Type Record · As of May 3, 2026
CESSNA 421
Fixed Wing Multi Engine · CONT MOTOR GTSIO-520-C
Registered
29
Year Range
1967–1968
NTSB Events
6
Airworthiness Directives
49
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered CESSNA 421 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- TX 13.8% 4
- FL 13.8% 4
- KS 10.3% 3
- CA 10.3% 3
- NY 6.9% 2
- MI 6.9% 2
- DE 6.9% 2
- AZ 6.9% 2
- ID 3.4% 1
- TN 3.4% 1
+5 more states
By Decade of Manufacture
- 1960s 79.3% 23
- Unknown 20.7% 6
02 / NTSB Records
Events involving CESSNA 421 aircraft
6 event(s) on file. Showing the most recent 6.
-
Jun 24, 2023
N123SMRockport, Texas
NTSB Docket → -
Aug 14, 2012
N863CPEverett, Washington
NTSB Docket → -
Feb 24, 1983
N123SMDAYTON, Tennessee
NTSB Docket → -
May 4, 1979
N123SMSEVIERVILLE, Tennessee
NTSB Docket → -
Sep 27, 1975
N25FEWARWICK, Rhode Island
NTSB Docket → -
Jun 14, 1974
N4572LSPRINGFIELD, Missouri
NTSB Docket →
03 / Airworthiness Directives
FAA directives applicable to CESSNA 421
49 directive(s) on file. Showing the most recent 25 · 24 more in the Federal Register.
-
Jun 12, 2023
Airworthiness Directives; Various Airplanes, Helicopters, and Engines
The FAA is adopting a new airworthiness directive (AD) for turbocharged, reciprocating engine-powered airplanes and helicopters and turbocharged, reciprocating engines with a certain v-band coupling installed. This AD was prompted by multiple failures of spot-welded, multi-segment v-band couplings at the tailpipe to t…
-
Jul 27, 2022
Airworthiness Directives; Various Airplanes, Helicopters, and Engines
The FAA proposes to adopt a new airworthiness directive (AD) for turbocharged, reciprocating engine-powered airplanes and helicopters and turbocharged, reciprocating engines with a certain v- band coupling installed. This proposed AD was prompted by multiple failures of spot-welded, multi-segment v-band couplings at t…
-
Feb 22, 2021
Airworthiness Directives; Textron Aviation Inc. (Type Certificate previously held by Cessna Aircraft Company) Airplanes
The FAA is withdrawing a notice of proposed rulemaking (NPRM) and supplemental notice of proposed rulemaking (SNPRM) that proposed to supersede airworthiness directive (AD) 72-14-08 R1 for Cessna Aircraft Company (now Textron Aviation Inc.) Models 310, 320, 401, 402, 411, and 421 airplanes. AD 72-14-08 R1 requires rep…
-
May 8, 2018
Airworthiness Directives; Textron Aviation Inc. Airplanes
We are revising Airworthiness Directive (AD) 2018-03-03 for certain Textron Aviation Inc. Models 401, 401A, 401B, 402, 402A, 402B, 402C, 411, 411A, 414, 414A, 421, 421A, 421B, 421C, and 425 airplanes. AD 2018-03-03 required repetitively inspecting the left and the right forward lower carry through spar cap for cracks…
-
Feb 13, 2018
Airworthiness Directives; Textron Aviation Inc. Airplanes
We are adopting a new airworthiness directive (AD) for certain Textron Aviation Inc. Models 401, 401A, 401B, 402, 402A, 402B, 402C, 411, 411A, 414, 414A 421, 421A, 421B, 421C, and 425 airplanes. This AD requires repetitively inspecting the left and the right forward lower carry through spar cap for cracks and replacin…
-
Aug 26, 2016
Airworthiness Directives; Textron Aviation, Inc. Airplanes
We are superseding Airworthiness Directive (AD) 2016-07-24 for all Textron Aviation, Inc. Models 310 through 310R, E310H, E310J, T310P through T310R, 310J-1, 320 through 320F, 320-1, 335, 340, 340A, 401 through 401B, 402 through 402C, 411, 411A, 414, 414A, and 421 through 421C airplanes (type certificates 3A10, 3A25,…
-
Apr 11, 2016
Airworthiness Directives; Textron Aviation, Inc. Airplanes
We are adopting a new airworthiness directive (AD) for all Textron Aviation, Inc. Models 310 through 310R, E310H, E310J, T310P through T310R, 310J-1, 320 through 320F, 320-1, 335, 340, 340A, 401 through 401B, 402 through 402C, 411, 411A, 414, 414A, and 421 through 421C airplanes (type certificates 3A10, 3A25, and A7CE…
-
Mar 3, 2014
Airworthiness Directives; Cessna Aircraft Company Airplanes
We are adopting a new airworthiness directive (AD) for certain Cessna Aircraft Company (Cessna) Models 310, 320, 340, 401, 402, 411, 414, and 421 airplanes. This AD was prompted by an investigation of recent and historical icing-related accidents and incidents for the products listed above. This AD requires either hav…
-
Oct 1, 2012
Airworthiness Directives; Cessna Aircraft Company Airplanes; Initial Regulatory Flexibility Analysis
This document announces the availability of and request for comments on the Initial Regulatory Flexibility Analysis for the previously published proposed airworthiness directive (AD) on Cessna Aircraft Company 310, 320, 340, 401, 402, 411, 414, and 421 airplanes regarding the installation of placards requiring flight…
-
Jun 3, 2011
Airworthiness Directives; Cessna Aircraft Company 310, 320, 340, 401, 402, 411, 414, and 421 Airplanes
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD would require you to install a placard that prohibits flight into known icing conditions and install a placard that increases published speed on approach 17 mph (15 knots) in case of an inadvertent encounter with ici…
-
Dec 31, 2009
Airworthiness Directives; Engine Components, Inc. (ECi) Reciprocating Engine Cylinder Assemblies
The FAA is superseding an existing airworthiness directive (AD) for Lycoming Engines (formerly Textron Lycoming) models 320, 360, and 540 series, "Parallel Valve" reciprocating engines, with certain Engine Components, Inc. (ECi) cylinder assemblies, part number (P/N) AEL65102 series "Titan," installed. That AD current…
-
Jul 30, 2009
Airworthiness Directives; Engine Components, Inc. (ECi) Reciprocating Engine Cylinder Assemblies
The FAA proposes to supersede an existing airworthiness directive (AD) for Lycoming Engines (formerly Textron Lycoming) models 320, 360, and 540 series, "Parallel Valve" reciprocating engines, with certain Engine Components, Inc. (ECi) cylinder assemblies, part number (P/N) AEL65102 series "Titan," installed. That AD…
-
Sep 15, 2008
Airworthiness Directives; Engine Components, Inc. (ECi) Reciprocating Engine Cylinder Assemblies
The FAA is adopting a new airworthiness directive (AD) for Lycoming Engines (formerly Textron Lycoming) models 320, 360, and 540 series, "Parallel Valve" reciprocating engines, with certain Engine Components, Inc. (ECi) cylinder assemblies, part number (P/N) AEL65102 series "Titan", installed. This AD requires initial…
-
May 19, 2008
Airworthiness Directives; Engine Components Inc. (ECi) Reciprocating Engine Cylinder Assemblies
The FAA proposes to adopt a new airworthiness directive (AD) for Lycoming Engines (formerly Textron Lycoming) models 320, 360, and 540 series, "Parallel Valve" reciprocating engines, with certain Engine Components Inc. (ECi) cylinder assemblies, part number (P/N) AEL65102 series "Titan", installed. This proposed AD wo…
-
Apr 21, 2008
Airworthiness Directives; Kelly Aerospace Power Systems Turbochargers
The FAA is adopting a new airworthiness directive (AD) for certain Kelly Aerospace Power Systems turbochargers. This AD requires a onetime visual inspection of suspect turbochargers for an excessive gap between the turbocharger turbine housing flange and the exhaust tube flange, and replacement of turbochargers that f…
-
Apr 2, 2007
Airworthiness Directives; Superior Air Parts, Inc. (SAP), Cylinder Assemblies Part Numbers Series: SA47000L, SA47000S, SA52000, SA55000, SL32000W, SL32000WH, SL32006W, SL36000TW, SL36000W, and SL36006W
The FAA is revising an existing airworthiness directive (AD) for certain SAP cylinder assemblies installed in Teledyne Continental Motors (TCM) 470, 520, and 550 series reciprocating engines, Lycoming Engines (LE) 320, 360, and 540 series reciprocating engines, Avco Lycoming (AL) 540 series reciprocating engines, and…
-
Mar 12, 2007
Airworthiness Directives; Teledyne Continental Motors GTSIO-520 Series Reciprocating Engines
The FAA is superseding an existing airworthiness directive (AD) for Teledyne Continental Motors (TCM) GTSIO-520 series reciprocating engines. That AD currently requires initial and repetitive visual inspections of the starter adapter assembly and crankshaft gear and unscheduled visual inspections of the starter adapte…
-
Feb 23, 2007
Airworthiness Directives; Superior Air Parts, Inc. (SAP), Cast Cylinder Assemblies Part Numbers Series: SA47000L, SA47000S, SA52000, SA55000, SL32000W, SL32000WH, SL32006W, SL36000TW, SL36000W, and SL36006W
The FAA is adopting a new airworthiness directive (AD) for certain SAP cast cylinder assemblies installed in Teledyne Continental Motors (TCM) 470, 520, and 550 series reciprocating engines, Lycoming Engines (LE) 320, 360, and 540 series reciprocating engines, Avco Lycoming (AL) 540 series reciprocating engines, and S…
-
Oct 26, 2006
Airworthiness Directives; Teledyne Continental Motors GTSIO-520 Series Reciprocating Engines
The FAA proposes to supersede an existing airworthiness directive (AD) for Teledyne Continental Motors (TCM) GTSIO-520 series reciprocating engines. That AD currently requires initial and repetitive visual inspections of the starter adapter assembly and crankshaft gear and unscheduled visual inspections of the starter…
-
Jun 6, 2006
Airworthiness Directives; Engine Components Inc. (ECi) Reciprocating Engine Cylinder Assemblies
The FAA is superseding an existing airworthiness directive (AD) for Lycoming Engines (formerly Textron Lycoming) models 320, 360, and 540 series, "Parallel Valve" reciprocating engines, with certain Engine Components Inc. (ECi) cylinder assemblies, part number (P/N) AEL65102 series "Classic Cast", installed. That AD c…
-
May 18, 2006
Airworthiness Directives; Engine Components Incorporated (ECi) Reciprocating Engine Connecting Rods
The FAA is adopting a new airworthiness directive (AD) for certain Lycoming Engines (formerly Textron Lycoming) 360 and 540 series reciprocating engines with ECi connecting rods, part number (P/N) AEL11750, installed. The Airmotive Engineering Corp, Division of Engine Components Incorporated (ECi), holds the Parts Man…
-
Feb 24, 2006
Airworthiness Directives; Engine Components Inc. (ECi) Reciprocating Engine Cylinder Assemblies
The FAA proposes to supersede an existing airworthiness directive (AD) for Lycoming Engines (formerly Textron Lycoming) models 320, 360, and 540 series, "Parallel Valve" reciprocating engines, with certain Engine Components Inc. (ECi) cylinder assemblies, part number (P/N) AEL65102 series "Classic Cast", installed. Th…
-
Dec 27, 2005
Airworthiness Directives; Engine Components Inc. (ECi) Reciprocating Engine Cylinder Assemblies
The FAA is adopting a new airworthiness directive (AD) for Lycoming Engines (formerly Textron Lycoming) models 320, 360, and 540 series, "Parallel Valve" reciprocating engines, with certain Engine Components Inc. (ECi) cylinder assemblies, part number (P/N) AEL65102 series "Classic Cast", installed. This AD requires r…
-
Nov 30, 2005
Airworthiness Directives; McCauley Propeller Systems Propeller Assemblies Models 2D34C53/74E-X; D2A34C58/90AT-X; 3AF32C87/82NC-X; D3AF32C87/82NC-X; D3A32C88/82NC-X; D3A32C90/82NC-X; and 3AF34C92/90LF-X.
The FAA is adopting a new airworthiness directive (AD) for McCauley Propeller Systems propeller assemblies, models 2D34C53/74E-X; D2A34C58/90AT-X; 3AF32C87/82NC-X; D3AF32C87/82NC-X; D3A32C88/82NC-X; D3A32C90/82NC-X; and 3AF34C92/90LF-X. This AD requires, within 10 flight hours or 10 days after the effective date of th…
-
Oct 12, 2005
Airworthiness Directives; The Cessna Aircraft Company Models 401, 401A, 401B, 402, 402A, 402B, 402C, 404, 411, 411A, 414, 414A, 421, 421A, 421B, 421C, 425, and 441 Airplanes
The FAA adopts a new airworthiness directive (AD) for certain The Cessna Aircraft Company (Cessna) Models 401, 401A, 401B, 402, 402A, 402B, 402C, 404, 411, 411A, 414, 414A, 421, 421A, 421B, 421C, 425, and 441 airplanes equipped with certain avionics bus circuit breaker switches. This AD requires you to inspect the avi…
04 / Type Certificate Data Sheets
FAA TCDS for CESSNA 421
The TCDS is the legal certification document — weight limits, performance, equipment, AD compliance times, operating limitations. 1 match in the FAA catalog.
- A7CE Historical Rev 46 · 11/24/2004
Cessna Aircraft Company
Models: 421C, 425, 402C, 402B + 12 more
06 / Supplemental Type Certificates
Modifications approved for CESSNA 421
496 STCs on file — every FAA-approved modification, alteration, or installation for this aircraft. STOL kits, avionics, fuel systems, floats, engine swaps, you name it.
-
05/27/2025
STC SA5581SW
Installation of ALCOR true-flow/ totalizer system
Alcor LLC
-
04/01/2025
STC SA02738CH (PAGE 5)
Installation of L-3 Communications Avionics Systems
Acron Aviation Inc.
-
04/01/2025
STC SA04046CH Page 1
Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500)
Acron Aviation Inc.
-
08/27/2024
STC SA04837NY
Installation of AeroLED's Holdings, LLC., position lights, navigation lights, strobe lights and beacon lights
AeroLED's Holdings, LLC
-
08/27/2024
STC SA02386AK
Replacement of existing landing and/or taxi light reflector and bulbs with Light Emitting Diode (LED) lighting systems
AeroLED's Holding LLC
-
11/16/2023
STC SA02532AT
Installation of subject Michelin tires on appropriate aircraft. For Michelin 5, 6, 8, and 10-inch rim diameter tires on General Aviation Aircraft.
Michelin North America Inc.
-
04/05/2023
STC SA00756DE
Installation of Automatic Dependent Surveillance Broadcast (ADS-B) Out Equipment using a Trig Avionics TT22 Transponder and an approved Global Positioning System (GPS) Position Se…
Peregrine
-
12/12/2022
STC SA02738CH (PAGE 5)
Installation of L-3 Communications Avionics Systems
L3Harris Aviation Products Inc.
-
12/12/2022
STC SA04046CH Page 1
Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500)
L3Harris Aviation Products Inc.
-
07/06/2022
STC SA02203AK (PAGE 2)
Installation of FlightLogic Synthetic Vision Electronic Flight Information System (EFIS-SV).
Genesys Aerosystems Inc.
-
06/16/2022
STC SA02254AK
Installation of "Single Screen", "2 or 3 Screen", "Dual Screen", or "4 or 6 screen"
Genesys Aerosystems Inc.
-
06/06/2022
STC SA02203AK (PAGE 2)
Installation of FlightLogic Synthetic Vision Electronic Flight Information System (EFIS-SV).
Genesys Aerosystems Inc.
-
03/30/2022
STC SA02444AK (PAGE 1)
Approval of the L-3 Communications NGT 9000/9000R ADS-B system installed
ADS-B Technologies LLC
-
02/02/2022
STC SA4270SW
Mount collision avoidance lights in engine nacelle.
Johnson Aviation Products
-
09/01/2021
STC SA11174SC PAGE 1
Installation of BendixKing by Honeywell KSN 770 and KSN 765 WAAS LPV approach capable nav/comm systems
Honeywell International Inc (Bendix King)
-
07/21/2021
STC SA02430SE
Fabrication and installation of a camera housing
Airborne Sensor LLC
-
06/23/2021
STC SA01316LA
Installation of Sandel Avionics Terrain Awareness and Warning System.
Sandel Avionics LLC
-
03/30/2021
STC SA02386AK
Replacement of existing landing and/or taxi light reflector and bulbs with Light Emitting Diode (LED) lighting systems
Aero LEDs LLC
-
07/17/2020
STC SA10236SC (2 OF 4)
Installation of a GDC 31 Roll Steering Converter
DAC International Inc
-
06/04/2020
STC SA02268CH (PAGE 3)
Installation of Airwolf Filter Corp. Air Oil Separator
Airwolf Filter Corporation
-
06/04/2020
STC SA02268CH (PAGE 2)
Installation of Airwolf Filter Corp. Air Oil Separator
Airwolf Filter Corporation
-
03/07/2020
STC SA00079NY
Installation of Airwolf remote mounted engine oil filter kit AFC-K008 on single and multi engine fixed wing light aircraft incorporating Teledyne Continental reciprocating engines …
Airwolf Filter Corporation
-
07/16/2019
STC SA01861SE (PAGE 2)
Fabrication and installation of Landing Light Controller
Seaton Engineering Corp.
-
07/16/2019
STC SA01800SE (PG 2)
Fabrication and installation of new or replacement of existing instrument panel lights dimmer control.
Seaton Engineering Corp.
-
07/02/2019
STC SA2091WE
Installation of air conditioning system
Air Comm Corporation
-
06/19/2019
STC SA800EA
Installation of Whelen Anti-Collision, Position, or Anti-Collision/Position Light System, and applicable associated power supplies
Whelen Aerospace Technologies
-
06/19/2019
STC SA00344BO PAGE 1
Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights.
Whelen Aerospace Technologies
-
05/30/2019
STC SA615EA (PAGE 2)
Installation of a Whelen Anti-Collision Strobe Light System as replacement for originally installed anti-collision lights.
Whelen Aerospace Technologies
-
05/24/2019
STC SA02019SE-D (1 OF 3)
Installation of Garmin GTN 6XX/7XX Navigation System
Garmin International Inc
-
05/24/2019
STC SA02019SE-D (1 OF 2)
Installation of Garmin GTN 6XX/7XX Navigation System
Garmin International Inc
+ 466 more STCs on file
07 / PMA replacement parts
FAA-approved replacement parts for CESSNA 421
47 parts on file from the FAA Parts Manufacturer Approval database. Each is a non-OEM part the FAA has authorized for use as a replacement on this aircraft type.
-
2307490-1#https://drs.faa.gov/browse/excelExternalWindow/DF4F9687613DED27862581F70079C019.0001##
LED Landing/ Recognition Light
Teledyne Reynolds replaces MS25241-4553, 4553
PMA holder → -
2307490-1#https://drs.faa.gov/browse/excelExternalWindow/4AB78E091CB1F8E186258175006DBFE4.0001##
LED Landing/ Recognition Light
Teledyne Reynolds replaces MS25241-4553, 4553
PMA holder → -
2307490-1#https://drs.faa.gov/browse/excelExternalWindow/F736EB58A886678486257E7A005579FE.0001##
LED Landing/ Recognition Light
Teledyne Reynolds replaces MS25241-4553, 4553
PMA holder → -
30010-1026WE#https://drs.faa.gov/browse/excelExternalWindow/35EFA3975F14CD24862582280078876D.0001##
Brush
Wencor LLC replaces 30010-1026
PMA holder → -
30010-1026WE#https://drs.faa.gov/browse/excelExternalWindow/93F7E5D1E36F5F4186257E2E005D3515.0001##
Brush
Wencor LLC replaces 30010-1026
PMA holder → -
EH30010-1026#https://drs.faa.gov/browse/excelExternalWindow/D2766058009112BB862581A100771C9B.0001##
Brush
Seginus Inc replaces Goodrich Power Systems P/N 30010-1026
PMA holder → -
EH30010-1026#https://drs.faa.gov/browse/excelExternalWindow/FD6BA0BB6749B3938625797300520831.0001##
Brush
Seginus Inc replaces Goodrich Power Systems P/N 30010-1026
PMA holder → -
EH30010-1026#https://drs.faa.gov/browse/excelExternalWindow/10765523232AE3B286257871006AEE85.0001##
Brush
Seginus Inc replaces Goodrich Power Systems P/N 30010-1026
PMA holder → -
EH30010-1026#https://drs.faa.gov/browse/excelExternalWindow/24DF07B03389B30B862578720061F050.0001##
Brush
Seginus Inc replaces Goodrich Power Systems P/N 30010-1026
PMA holder → -
R1224B#https://drs.faa.gov/browse/excelExternalWindow/0167381973CEF8E486257F5C005EE6BB.0001##
Alternator Controller (Voltage Regulator)
Hartzell Engine Technologies LLC replaces 991026-3
PMA holder → -
CD22185#https://drs.faa.gov/browse/excelExternalWindow/4008BDC26A1A505786257FBD006B5214.0001##
Fuel Kit
Hartzell Engine Technologies LLC replaces 5100106-24, 5100106-204, 5100106-223, 5100106-305, MS9024-03, MS27039-1-08, NAS679A3, AN816-4D, 9910004-3, 9910004-12, MS29512-04, 0850475-8, MS27039-0828, NAS43003-16, MS21042-6, MS20823-4D, AN815-4D, MS29512-04, 9910004-4, 5126203-1, 0851566-2, MS27039-0805, MS35333-38, MS27039-0806, MS20822-4D, 9910088-4
PMA holder → -
H13239#https://drs.faa.gov/browse/excelExternalWindow/6DF577C5D8BBC25F86257BBF0062D279.0001##
Discharge Valve
HRD Aerosystems Inc replaces 13239
PMA holder → -
H13239#https://drs.faa.gov/browse/excelExternalWindow/72A4B5497D82BCF186257C4700712100.0001##
Discharge Valve
HRD Aerosystems Inc replaces 13239
PMA holder → -
TR-30010-1026#https://drs.faa.gov/browse/excelExternalWindow/AF6F2DBD287396A686257E1B00638186.0001##
Brush
Aerospace Turbine Rotables replaces Goodrich 30010-1026
PMA holder → -
30111102-1#https://drs.faa.gov/browse/excelExternalWindow/5499A47CE102516A86257E0E0056CE48.0001##
Fire Extinguisher
Meggitt Safety Systems Inc replaces 9910445-1
PMA holder → -
213421#https://drs.faa.gov/browse/excelExternalWindow/E9C23D25D80FC414862573CA0059360F.0001##
Synchronizer Kits
Woodward Inc replaces -
PMA holder → -
AK279#https://drs.faa.gov/browse/excelExternalWindow/70446F7F6DCE39F686257513005D50E6.0001##
Mitchell Kit
Century Flight Systems Inc replaces -
PMA holder → -
2307490-1#https://drs.faa.gov/browse/excelExternalWindow/37A0BBCBB91F767486257DBE006BCB9E.0001##
LED Landing/ Recognition Light
Teledyne Reynolds replaces MS25241-4553
PMA holder → -
R1224B#https://drs.faa.gov/browse/excelExternalWindow/D513EEE770D4B59886257888005989E3.0001##
Alternator Controller (Voltage Regulator)
Plane Power, Ltd. replaces 991026-3 *Note both regulators must be replaced
PMA holder → -
Kit FF with latest revision#https://drs.faa.gov/browse/excelExternalWindow/305F100BBBEE8F57862573690047DC60.0001##
Installation of Symbolic Displays, Inc. CFS-2000 Electronic Fuel Flow Metering System
Ram Aircraft Limited Partnership replaces -
PMA holder → -
ST-237#https://drs.faa.gov/browse/excelExternalWindow/22F7002F4E184A8E862578ED006626AD.0001##
System 60 Two Axis Automatic Flight Guidance System
S-TEC Corporation replaces Modification Part
PMA holder → -
ST-379#https://drs.faa.gov/browse/excelExternalWindow/AC91C42252A89A1F862578ED006623D8.0001##
System 65 Two Axis Automatic Flight Guidance System
S-TEC Corporation replaces Modification Part
PMA holder → -
ST-238#https://drs.faa.gov/browse/excelExternalWindow/766F1ED9B3DF01DD862578ED0066221B.0001##
Yaw Damper System
S-TEC Corporation replaces Modification Part
PMA holder → -
ASC400WL#https://drs.faa.gov/browse/excelExternalWindow/A102679558DA187786257744006812C5.0001##
Wing Locker Locks
Aircraft Security & Alert Systems LLC replaces F6500H lock
PMA holder → -
ASC400CD#https://drs.faa.gov/browse/excelExternalWindow/8F30DEEE2D24C8A0862577440068113D.0001##
Cabin Door Lock
Aircraft Security & Alert Systems LLC replaces F6500H lock 5011185-5 cam
PMA holder → -
42-0119#https://drs.faa.gov/browse/excelExternalWindow/5DEFC452B3BFD77A8625774B006A6B29.0001##
7th Seat
Aviation Fabricators Inc replaces Modification Part
PMA holder → -
42-0119#https://drs.faa.gov/browse/excelExternalWindow/03A2DEFDAB700FBD8625774B006A6AE9.0001##
7th Seat
Aviation Fabricators Inc replaces Modification Part
PMA holder → -
2176-200N#https://drs.faa.gov/browse/excelExternalWindow/FECDBA140DA1A90586257323004EC081.0001##
Wastegate Gasket
Ram Aircraft Limited Partnership replaces Cessna Part No. 24096-200N
PMA holder → -
2176-300N#https://drs.faa.gov/browse/excelExternalWindow/85D4FABB718A739986257305005473A7.0001##
Wastegate Gasket
Ram Aircraft Limited Partnership replaces CessnaPart No. 24096-300N
PMA holder → -
2176-200N#https://drs.faa.gov/browse/excelExternalWindow/7A884A21AC99E1C4862573050054737C.0001##
Wastegate Gasket
Ram Aircraft Limited Partnership replaces CessnaPart No. 24096-200N
PMA holder → -
2176-300N#https://drs.faa.gov/browse/excelExternalWindow/29779C8D7772A5AB86257323004EC0A0.0001##
Wastegate Gasket
Ram Aircraft Limited Partnership replaces Cessna Part No. 24096-300N
PMA holder → -
Dwg list No. 24 last rev. 12/10/85 24 Series Parts List dtd. 5/4/87 or later FAA approved revision#https://drs.faa.gov/browse/excelExternalWindow/E4EC34048FFECCA28625735C0053650A.0001##
STOL System Kit
Sierra Industries, Ltd. replaces -
PMA holder → -
Combs Aircraft, Inc. Dwg. List No. 060000 dtd 1-20-69, or P/N 42-0119, Av. Fab. Dwg. List AF-128, dtd 7-20-90 or later FAA-, Approved Rev.#https://drs.faa.gov/browse/excelExternalWindow/31F8E4FB1FB16D7C8625752F005670A7.0001##
7th Seat
Aviation Fabricators Inc replaces Modification Part
PMA holder → -
Combs Aircraft,Inc. Dwg. List No. 060000 dtd 1-20-69 or P/N 42-0119, Av. Fab. Dwg. List AF-128 dtd 7-20-90 or later FAA-approved rev.#https://drs.faa.gov/browse/excelExternalWindow/D31D3BBFD0B378E98625752F005670D3.0001##
7th Seat
Aviation Fabricators Inc replaces Modification Part
PMA holder → -
24 Series#https://drs.faa.gov/browse/excelExternalWindow/9CB9BE4CF52D5B8B862571B60063DB38.0001##
STOL System Kit
Sierra Industries, Ltd. replaces Modification Part
PMA holder → -
ASC400NB#https://drs.faa.gov/browse/excelExternalWindow/010B4008BBFCB99B86257744006811C5.0001##
Nose baggage lock
Aircraft Security & Alert Systems LLC replaces F6586H lock
PMA holder → -
8109-19 (LH) Rev. F Group List No. 8109-19 dtd. 11/13/85 or later FAA approved revision.#https://drs.faa.gov/browse/excelExternalWindow/29C34C9EC4A94381862573750069136F.0001##
Exhaust Manifold Assy.
Wall Colmonoy Corporation replaces Cessna Part No. 5155125-5
PMA holder → -
8108-19 (RH) Rev. E Group List No. 8108-19 dtd, 11/14/85 or later FAA approved revision#https://drs.faa.gov/browse/excelExternalWindow/CAD937CB21FBE01F8625737500691332.0001##
Exhaust Manifold Assy.
Wall Colmonoy Corporation replaces Cessna Part No. 5155125-6
PMA holder → -
1213-2#https://drs.faa.gov/browse/excelExternalWindow/C360B335DFE17B5F8625736A004A0336.0001##
Air Induction Duct
Ram Aircraft Limited Partnership replaces Teledyne Continenta1 P/N 641739
PMA holder → -
1213-1#https://drs.faa.gov/browse/excelExternalWindow/869FFF899899211E8625736A004A02FF.0001##
Air Induction Duct
Ram Aircraft Limited Partnership replaces Te1edyne Continental P/N 641738
PMA holder →
+ 7 more PMA parts on file
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for CESSNA 421
Advisory Circulars
No ACs explicitly mention this type. Showing universal operating-rule ACs that apply to all aircraft.
Recent Federal Register activity
Latest rulemakings touching general operating rules (Part 91) and maintenance rules (Part 43).
- 2026-04-17 Settlement Policy for Small Unmanned Aircraft System (UAS) Cases FR ↗
- 2026-02-10 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period; Denial of Extension FR ↗
- 2026-02-02 25-Hour Cockpit Voice Recorder (CVR) Requirement, New Aircraft Production FR ↗
- 2026-01-28 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period FR ↗
- 2026-01-07 Requirements for Interference-Tolerant Radio Altimeter Systems FR ↗
05 / Aircraft of this type
All 29 registered N-numbers
Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.
| N-number | St | Year | NTSB | FAA |
|---|---|---|---|---|
| N100JL | NY | — | · | Look up ↗ |
| N1027D | ID | 1968 | · | Look up ↗ |
| N123SM | TX | 1968 | ● | Look up ↗ |
| N12KN | MI | 1968 | · | Look up ↗ |
| N1421U | TN | 1967 | · | Look up ↗ |
| N18T | DE | 1968 | · | Look up ↗ |
| N25FE | KS | — | ● | Look up ↗ |
| N269F | DE | 1968 | · | Look up ↗ |
| N285N | WA | 1968 | · | Look up ↗ |
| N318TW | FL | — | · | Look up ↗ |
| N4070L | NM | 1968 | · | Look up ↗ |
| N4074L | FL | 1968 | · | Look up ↗ |
| N421BV | KS | 1968 | · | Look up ↗ |
| N421DN | TX | 1968 | · | Look up ↗ |
| N421MR | FL | 1968 | · | Look up ↗ |
| N421MW | TX | 1968 | · | Look up ↗ |
| N421RD | CA | 1968 | · | Look up ↗ |
| N421RR | MT | 1968 | · | Look up ↗ |
| N421Z | AZ | 1968 | · | Look up ↗ |
| N4572L | AR | 1968 | ● | Look up ↗ |
| N4AF | TX | 1968 | · | Look up ↗ |
| N52JR | KY | 1968 | · | Look up ↗ |
| N577SW | KS | — | · | Look up ↗ |
| N5874C | CA | — | · | Look up ↗ |
| N5CH | AZ | 1968 | · | Look up ↗ |
| N62DW | NY | — | · | Look up ↗ |
| N68WA | MI | 1968 | · | Look up ↗ |
| N70DC | CA | 1968 | · | Look up ↗ |
| N863CP | FL | 1968 | ● | Look up ↗ |
Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)
05 / Sources & Methodology
Every count traces back to a primary US-government source
- FAA Aircraft Registry →
Refreshed Apr 27, 2026
Available
- NTSB CAROL →
Refreshed Apr 27, 2026
Available
- Federal Register (FAA Airworthiness Directives) →
Refreshed Apr 27, 2026
Available
We render counts and lists as the agency publishes them. Read the methodology →