Type Record · As of May 3, 2026
CESSNA 421A
Fixed Wing Multi Engine · CONT MOTOR GTSI0-520-F-K
Registered
21
Year Range
1968–1969
NTSB Events
4
Airworthiness Directives
32
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered CESSNA 421A aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- LA 5.0% 1
- WV 5.0% 1
- IN 5.0% 1
- DE 5.0% 1
- NC 5.0% 1
- OR 5.0% 1
- CA 5.0% 1
- TX 5.0% 1
- ND 5.0% 1
- TN 5.0% 1
+10 more states
By Decade of Manufacture
- 1960s 76.2% 16
- Unknown 23.8% 5
02 / NTSB Records
Events involving CESSNA 421A aircraft
4 event(s) on file. Showing the most recent 4.
-
Nov 7, 1997
N2957QTOMAHAWK, Wisconsin
NTSB Docket → -
Jul 21, 1983
N6272TISSAQUAH, Washington Minor
NTSB Docket → -
Jul 10, 1981
N2235QEL RENO, Oklahoma
NTSB Docket → -
Sep 12, 1976
N2235QINTL FALLS, Minnesota
NTSB Docket →
03 / Airworthiness Directives
FAA directives applicable to CESSNA 421A
32 directive(s) on file. Showing the most recent 25 · 7 more in the Federal Register.
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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…
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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…
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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…
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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…
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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…
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Sep 9, 2005
Airworthiness Directives; Goodrich De-icing and Specialty Systems “FASTprop” Propeller De-icers
The FAA is adopting a new airworthiness directive (AD) for Goodrich De-icing and Specialty Systems "FASTprop" propeller de- icers, part numbers P4E1188 series, P4E1601 series, P4E2200 series, P4E2271-10, P4E2575-7, P4E2575-10, P4E2598-10, P5855BSW, P6199SW, P6592SW, P6662SW, and P6975-11, installed. This AD requires i…
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Sep 9, 2005
Airworthiness Directives; Hartzell Propeller Inc. Propellers
The FAA is adopting a new airworthiness directive (AD) for certain Hartzell Propeller Inc. propellers. This AD requires inspecting the propeller blades and other critical propeller parts for corrosion and mechanical damage. This AD results from two events where a "Z- shank" blade failed and separated and the results o…
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Jun 9, 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 proposes to adopt 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 proposed AD would requi…
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May 6, 2005
Airworthiness Directives; Kelly Aerospace Power Systems Part Number (P/N) 14D11, A14D11, B14D11, C14D11, 23D04, A23D04, B23D04, C23D04, or P23D04 Fuel Regulator Shutoff Valves (Formerly Owned by ElectroSystems, JanAero Devices, Janitrol, C&D Airmotive Products, FL Aerospace, and Midland-Ross Corporation)
The FAA is revising Airworthiness Directive (AD) 2004-25-16, which applies to aircraft equipped with a fuel regulator shutoff valve part number (P/N) 14D11, A14D11, B14D11, C14D11, 23D04, A23D04, B23D04, C23D04, or P23D04 used with B1500, B2030, B2500, B3040, B3500, B4050, or B4500 B-Series combustion heaters. AD 2004…
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Apr 6, 2005
Airworthiness Directives; Goodrich De-icing and Specialty Systems “FASTprop” Propeller De-icers
The FAA proposes to adopt a new airworthiness directive (AD) for Goodrich De-icing and Specialty Systems "FASTprop" propeller de- icers, part numbers P4E1188 series, P4E1601 series, P4E2200 series, P4E2271-10, P4E2575-7, P4E2575-10, P4E2598-10, P5855BSW, P6199SW, P6592SW, P6662SW, and P6975-11, installed. This propose…
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Mar 9, 2005
Airworthiness Directives; Kelly Aerospace Power Systems Part Number (P/N) 14D11, A14D11, B14D11, C14D11, 23D04, A23D04, B23D04, C23D04, or P23D04 Fuel Regulator Shutoff Valves (formerly owned by ElectroSystems, JanAero Devices, Janitrol, C&D Airmotive Products, FL Aerospace, and Midland-Ross Corporation)
The FAA proposes to revise Airworthiness Directive (AD) 2004- 25-16, which applies to aircraft equipped with a fuel regulator shutoff valve part number (P/N) 14D11, A14D11, B14D11, C14D11, 23D04, A23D04, B23D04, C23D04, or P23D04 used with B1500, B2030, B2500, B3040, B3500, B4050, or B4500 B-Series combustion heaters.…
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Jan 19, 2005
Airworthiness Directives; GARMIN International Inc. GTX 33, GTX 33D, GTX 330, and GTX 330D Mode S Transponders
The FAA is adopting a new airworthiness directive (AD) to supersede Airworthiness Directive 2004-10-15, which applies to certain GTX 330 and GTX 330D Mode S transponders that are installed on airplanes. AD 2004-10-15 currently requires you to install GTX 330/330D Software Upgrade Version 3.03, 3.04, or 3.05. This AD a…
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Dec 29, 2004
Airworthiness Directives; Hartzell Propeller Inc. Propellers
The FAA proposes to adopt a new airworthiness directive (AD) for certain Hartzell Propeller Inc. propellers. This proposed AD would require inspecting the propeller blades and other critical propeller parts for corrosion and mechanical damage. This proposed AD results from two events where a "Z-shank" blade failed and…
-
Dec 16, 2004
Airworthiness Directives; Kelly Aerospace Power Systems Part Number (P/N) 14D11, A14D11, B14D11, C14D11, 23D04, A23D04, B23D04, C23D04, or P23D04 Fuel Regulator Shutoff Valves (Formerly Owned by ElectroSystems, JanAero Devices, Janitrol, C&D, FL Aerospace, and Midland-Ross Corporation)
The FAA is adopting a new airworthiness directive (AD) to supersede AD 2001-17-13, which applies to aircraft equipped with a Kelly Aerospace Power Systems (Kelly Aerospace) part number (P/N) 14D11, A14D11, B14D11, C14D11, 23D04, A23D04, B23D04, C23D04, or P23D04 fuel regulator shutoff valve used with Kelly Aerospace B…
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Oct 22, 2004
Airworthiness Directives; Kelly Aerospace Power Systems B-Series Combustion Heaters Models B1500, B2030, B2500, B3040, B3500, B4050, and B4500 (Formerly Owned by JanAero Devices, Janitrol, C&D, FL Aerospace, and Midland-Ross Corporation)
The FAA is superseding Airworthiness Directive (AD) 96-20-07, which applies to certain B-Series Combustion Heaters Models B1500, B2030, B3040, and B4050 that are installed on airplanes. AD 96-20-07 currently requires you to repetitively test (pressure decay) the combustion tube and overhaul any heater that does not pa…
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Oct 7, 2004
Airworthiness Directives; GARMIN International Inc. GTX 33, GTX 33D, GTX 330, and GTX 330D Mode S Transponders
The FAA proposes to supersede Airworthiness Directive (AD) 2004-10-15, which applies to certain GTX 330 and GTX 330D Mode S transponders that are installed on airplanes. AD 2004-10-15 currently requires you to install GTX 330/330D Software Upgrade Version 3.03, 3.04, or 3.05. This proposed AD applies to certain GTX 33…
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May 21, 2004
Airworthiness Directives; GARMIN International Inc. GTX 330 Mode S Transponders and GTX 330D Diversity Mode S Transponders
The FAA adopts a new airworthiness directive (AD) for certain GARMIN International Inc. GTX 330/GTX 330D Mode S transponders that are installed on aircraft. This AD requires you to install GTX 330/330D Software Upgrade Version 3.03, 3.04, or 3.05. This AD is the result of observations that the GTX 330 and GTX 330D may…
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Apr 20, 2004
Airworthiness Directives; Engine Components Incorporated (ECi) Reciprocating Engine Cylinders
The FAA is adopting a new airworthiness directive (AD) for Teledyne Continental Motors (TCM) models 520 and 550 series engines with certain ECi cylinders installed. This AD requires replacing certain serial-numbered (SN) cylinders supplied by ECi before further flight. This AD results from reports of 34 failures of cy…
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Dec 30, 2003
Airworthiness Directives; GARMIN International Inc. GTX 330 Mode S Transponders and GTX 330D Diversity Mode S Transponders
The FAA proposes to adopt a new airworthiness directive (AD) for certain GARMIN International Inc. GTX 330/GTX 330D Mode S transponders. This proposed AD would require you to install GTX 330/ 330D Software Upgrade Version 3.03. This proposed AD is the result of observations that the GTX 330 and GTX 330D may detect, fr…
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Dec 3, 2001
Airworthiness Directives; GARMIN International GNS 430 Units
This amendment adopts a new airworthiness directive (AD) that applies to certain GARMIN International (GARMIN) GNS 430 units that are installed on aircraft. This AD requires you to modify the unit to incorporate circuitry changes to the GNS 430 unit's deviation and flag outputs. This AD is the result of reports of ina…
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Aug 22, 2001
Airworthiness Directives; JanAero Devices Part Number (P/N) 14D11, A14D11, B14D11, C14D11, 23D04, A23D04, B23D04, and C23D04 Fuel Regulator Shutoff Valves
This amendment supersedes Airworthiness Directive (AD) 2001- 08-01, which applies to certain JanAero Devices (JanAero) 14D11 and 23D04 series fuel regulator shutoff valves used with certain JanAero combustion heaters that are installed on aircraft. AD 2001-08-01 currently requires you to visually inspect and pressure…
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Aug 6, 2001
Airworthiness Directives; GARMIN International GNS 430 Units
This document proposes to adopt a new airworthiness directive (AD) that would apply to certain GARMIN International (GARMIN) GNS 430 units that are installed on aircraft. The proposed AD would require you to modify the unit to incorporate circuitry changes to the GNS 430 unit's deviation and flag outputs. The proposed…
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Apr 17, 2001
Airworthiness Directives; JanAero Devices 14D11 and 23D04 Series Fuel Regulator and Shutoff Valves
This amendment adopts a new airworthiness directive (AD) that applies to certain JanAero Devices (JanAero) fuel regulator and shutoff valves used with JanAero combustion heaters that are installed on airplanes. This AD requires you to visually inspect and pressure test for leaks, and, if leaks are found, replace the f…
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Jan 19, 2000
Airworthiness Directives; Cessna Aircraft Company 300 and 400 Series Airplanes
This amendment supersedes Airworthiness Directive (AD) 75-23- 08 R5, which currently requires repetitively inspecting and replacing or repairing the exhaust system on certain Cessna Aircraft Company (Cessna) 300 and 400 series airplanes. The requirements of this AD replace the inspections and replacements that are req…
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Jul 6, 1999
Airworthiness Directives; Cessna Aircraft Company 300 and 400 Series Airplanes
This document proposes to supersede Airworthiness Directive (AD) 75-23-08 R5, which currently requires repetitively inspecting and replacing or repairing the exhaust system on certain Cessna Aircraft Company (Cessna) 300 and 400 series airplanes. The proposed AD would replace the inspections and replacements that are…
04 / Type Certificate Data Sheets
FAA TCDS for CESSNA 421A
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 421A
433 STCs on file — every FAA-approved modification, alteration, or installation for this aircraft. STOL kits, avionics, fuel systems, floats, engine swaps, you name it.
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04/01/2025
STC SA02738CH (PAGE 5)
Installation of L-3 Communications Avionics Systems
Acron Aviation Inc.
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04/01/2025
STC SA04046CH Page 1
Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500)
Acron Aviation Inc.
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08/27/2024
STC SA04837NY
Installation of AeroLED's Holdings, LLC., position lights, navigation lights, strobe lights and beacon lights
AeroLED's Holdings, LLC
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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
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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.
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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
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12/12/2022
STC SA02738CH (PAGE 5)
Installation of L-3 Communications Avionics Systems
L3Harris Aviation Products Inc.
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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.
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07/06/2022
STC SA02203AK (PAGE 2)
Installation of FlightLogic Synthetic Vision Electronic Flight Information System (EFIS-SV).
Genesys Aerosystems Inc.
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06/16/2022
STC SA02254AK
Installation of "Single Screen", "2 or 3 Screen", "Dual Screen", or "4 or 6 screen"
Genesys Aerosystems Inc.
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06/06/2022
STC SA02203AK (PAGE 2)
Installation of FlightLogic Synthetic Vision Electronic Flight Information System (EFIS-SV).
Genesys Aerosystems Inc.
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03/30/2022
STC SA02444AK (PAGE 1)
Approval of the L-3 Communications NGT 9000/9000R ADS-B system installed
ADS-B Technologies LLC
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02/02/2022
STC SA4270SW
Mount collision avoidance lights in engine nacelle.
Johnson Aviation Products
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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)
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07/21/2021
STC SA02430SE
Fabrication and installation of a camera housing
Airborne Sensor LLC
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06/23/2021
STC SA01316LA
Installation of Sandel Avionics Terrain Awareness and Warning System.
Sandel Avionics LLC
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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
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07/17/2020
STC SA10236SC (2 OF 4)
Installation of a GDC 31 Roll Steering Converter
DAC International Inc
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06/04/2020
STC SA02268CH (PAGE 3)
Installation of Airwolf Filter Corp. Air Oil Separator
Airwolf Filter Corporation
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06/04/2020
STC SA02268CH (PAGE 2)
Installation of Airwolf Filter Corp. Air Oil Separator
Airwolf Filter Corporation
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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
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07/16/2019
STC SA01861SE (PAGE 2)
Fabrication and installation of Landing Light Controller
Seaton Engineering Corp.
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07/16/2019
STC SA01800SE (PG 2)
Fabrication and installation of new or replacement of existing instrument panel lights dimmer control.
Seaton Engineering Corp.
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07/02/2019
STC SA2091WE
Installation of air conditioning system
Air Comm Corporation
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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
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06/19/2019
STC SA00344BO PAGE 1
Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights.
Whelen Aerospace Technologies
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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
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05/24/2019
STC SA02019SE-D (1 OF 3)
Installation of Garmin GTN 6XX/7XX Navigation System
Garmin International Inc
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05/24/2019
STC SA02019SE-D (1 OF 2)
Installation of Garmin GTN 6XX/7XX Navigation System
Garmin International Inc
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05/24/2019
STC SA02019SE-D (3 OF 3)
Installation of Garmin GTN 6XX/7XX Navigation System
Garmin International Inc
+ 403 more STCs on file
07 / PMA replacement parts
FAA-approved replacement parts for CESSNA 421A
26 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.
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470830-0010#https://drs.faa.gov/browse/excelExternalWindow/0DD5D38A67474D0F86257B63006943BF.0001##
Bypass Valve
Hartzell Engine Technologies LLC replaces Cessna Aircraft C165006-0401
PMA holder → -
470830-0010#https://drs.faa.gov/browse/excelExternalWindow/61D69FE9601BB106862577FB00551122.0001##
Bypass Valve
Hartzell Engine Technologies LLC replaces Cessna Aircraft C165006-0401
PMA holder → -
1009-7#https://drs.faa.gov/browse/excelExternalWindow/FD1A5FD156AF47CA862573690070E9AB.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces Cessna Baffle Seal, P/N 5155117-64
PMA holder → -
1009-14#https://drs.faa.gov/browse/excelExternalWindow/D6F9A5D9653DC88C862573690070EA14.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5155117-3
PMA holder → -
1009-23#https://drs.faa.gov/browse/excelExternalWindow/DC0E01B6EBDB78A0862573690070EAB9.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5050101-86
PMA holder → -
1009-9#https://drs.faa.gov/browse/excelExternalWindow/D1987716811A7DA1862573690070E9C7.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces Cessna Baffle Seal, P/N 5155117-69
PMA holder → -
1009-26#https://drs.faa.gov/browse/excelExternalWindow/D25D2A8E08E77D9E862573690070EB27.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5155120-6
PMA holder → -
1009-16#https://drs.faa.gov/browse/excelExternalWindow/BAD515E53E98AF41862573690070EA4B.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5155117-32
PMA holder → -
1009-27#https://drs.faa.gov/browse/excelExternalWindow/B71DD75715E25F6B862573690070EB46.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5050103-2
PMA holder → -
1009-15#https://drs.faa.gov/browse/excelExternalWindow/C083005FB2034315862573690070EA2A.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5155117-2
PMA holder → -
1009-25#https://drs.faa.gov/browse/excelExternalWindow/BEB358B50CDC7A40862573690070EB04.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5155117-1
PMA holder → -
1009-24#https://drs.faa.gov/browse/excelExternalWindow/AFF658834FC47448862573690070EAED.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5050101-81
PMA holder → -
1009-6#https://drs.faa.gov/browse/excelExternalWindow/9C9C9C1E939CB720862573690070E98D.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces Cessna Baffle Seal, P/N 5050101-71
PMA holder → -
1009-10#https://drs.faa.gov/browse/excelExternalWindow/8701C0FEA8E660CA862573690070E9DD.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5050101-70
PMA holder → -
1009-20#https://drs.faa.gov/browse/excelExternalWindow/731C9185DC74774C862573690070EA60.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 515174-1
PMA holder → -
1009-21#https://drs.faa.gov/browse/excelExternalWindow/4632CEDE5FBE5245862573690070EA81.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5050101-83
PMA holder → -
1009-5#https://drs.faa.gov/browse/excelExternalWindow/387481FE197293F8862573690070E968.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces Cessna Baffle Seal, P/N 5050101-72
PMA holder → -
1009-22#https://drs.faa.gov/browse/excelExternalWindow/28BADBAAF852E00C862573690070EA99.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5050101-88
PMA holder → -
1009-28#https://drs.faa.gov/browse/excelExternalWindow/12BE57A53593685A862573690070EB5C.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5050101-15
PMA holder → -
1009-11#https://drs.faa.gov/browse/excelExternalWindow/0F4FA64E343F0D28862573690070E9F3.0001##
Engine Baffle Seal
Ram Aircraft Limited Partnership replaces CESSNA BAFFLE SEAL, P/N 5050101-69
PMA holder → -
201B(H)#https://drs.faa.gov/browse/excelExternalWindow/4FC5B6FBE15E68DA86257425006B24AE.0001##
Transducer
Instrument Tech Corp. replaces Modification Part
PMA holder → -
201B(M)#https://drs.faa.gov/browse/excelExternalWindow/B575D66FE64D6EB886257425006B2498.0001##
Transducer
Instrument Tech Corp. replaces Modification Part
PMA holder → -
201B(L)#https://drs.faa.gov/browse/excelExternalWindow/DACF062115C8F46286257425006B2482.0001##
Transducer
Instrument Tech Corp. replaces Modification Part
PMA holder → -
201B(M)#https://drs.faa.gov/browse/excelExternalWindow/97AF32AF873C18CD862571C3006B1264.0001##
Transducer
Instrument Tech Corp. replaces 201B
PMA holder → -
201B(L)#https://drs.faa.gov/browse/excelExternalWindow/5654D16FE454EE98862571C3006B0ADF.0001##
Transducer
Instrument Tech Corp. replaces 201B
PMA holder → -
201B(H)#https://drs.faa.gov/browse/excelExternalWindow/AF7F7A90863F24B1862571C3006B037B.0001##
Transducer
Instrument Tech Corp. replaces 201B
PMA holder →
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for CESSNA 421A
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 21 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 |
|---|---|---|---|---|
| N114AJ | LA | 1969 | · | Look up ↗ |
| N2211Q | WV | 1968 | · | Look up ↗ |
| N2214Q | IN | 1968 | · | Look up ↗ |
| N2221Q | DE | 1968 | · | Look up ↗ |
| N2235Q | NC | 1968 | ● | Look up ↗ |
| N2236Q | OR | 1968 | · | Look up ↗ |
| N28835 | CA | 1969 | · | Look up ↗ |
| N2957Q | TX | 1969 | ● | Look up ↗ |
| N3398Q | ND | 1969 | · | Look up ↗ |
| N421RL | TN | 1968 | · | Look up ↗ |
| N421RM | SC | 1969 | · | Look up ↗ |
| N421SH | FL | — | · | Look up ↗ |
| N44SC | MN | 1969 | · | Look up ↗ |
| N53RR | WA | — | · | Look up ↗ |
| N6272T | ME | 1969 | ● | Look up ↗ |
| N639SC | AZ | 1969 | · | Look up ↗ |
| N712JW | NV | 1969 | · | Look up ↗ |
| N740AG | — | — | · | Look up ↗ |
| N790X | OK | — | · | Look up ↗ |
| N849JB | KS | — | · | Look up ↗ |
| N99VK | WY | 1969 | · | 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 →