Type Record · As of May 3, 2026
GATES LEARJET CORP 55C
Fixed Wing Multi Engine · HONEYWELL TFE-731-SER
Registered
6
Year Range
1979–1990
NTSB Events
0
Airworthiness Directives
2
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered GATES LEARJET CORP 55C aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- SC 16.7% 1
- UT 16.7% 1
- FL 16.7% 1
- IN 16.7% 1
- MN 16.7% 1
- PA 16.7% 1
By Decade of Manufacture
- 1970s 16.7% 1
- 1980s 33.3% 2
- 1990s 16.7% 1
- Unknown 33.3% 2
02 / NTSB Records
Events involving GATES LEARJET CORP 55C aircraft
No NTSB-recorded events match GATES LEARJET CORP 55C in the indexed corpus.
03 / Airworthiness Directives
FAA directives applicable to GATES LEARJET CORP 55C
2 directive(s) on file. Showing the most recent 2.
-
Sep 12, 1995
Airworthiness Directives; Learjet Model 35, 35A, 36, 36A, 55, 55B, and 55C Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Learjet Model 35, 35A, 36, 36A, 55, 55B, and 55C airplanes, that requires installation of a placard on the instrument panel in the cockpit to advise the flightcrew that the Omega navigation system may be inoperative at certain engine speed…
-
May 16, 1995
Airworthiness Directives; Learjet Model 35, 35A, 36, 36A, 55, 55B, and 55C Airplanes
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Learjet Model 35, 35A, 36, 36A, 55, 55B, and 55C airplanes. This proposal would require installation of a placard on the instrument panel in the cockpit to advise the flightcrew that the Omega navigation system may…
04 / Type Certificate Data Sheets
FAA TCDS for GATES LEARJET CORP 55C
The TCDS is the legal certification document — weight limits, performance, equipment, AD compliance times, operating limitations. 1 match in the FAA catalog.
- A10CE Historical Rev 64 · 12/28/2010
Learjet Inc.
Models: 25B, 24F-A, 36A, 24A + 25 more
06 / Supplemental Type Certificates
Modifications approved for GATES LEARJET CORP 55C
171 STCs on file — every FAA-approved modification, alteration, or installation for this aircraft. STOL kits, avionics, fuel systems, floats, engine swaps, you name it.
-
03/06/2026
STC SA2622NM
Installation of Precise Flight Pulselite Control Unit in landing/taxi system. (767-200 B17) (DHC-8 101)
Precise Flight Inc.
-
09/26/2025
STC ST03885AT
Installation of an Avionica, Inc. avCM Cellular Module
Aircraft Systems and Manufacturing Inc.
-
09/15/2025
STC ST12087CH
Installation replacement Cabin/Cockpit Handheld Fire Extinguishers
Avcon Industries Inc.
-
03/24/2025
STC ST02472AT
Installation of a mini Quick Access Recorder (QAR) model MKI, MKII, or MKIII
Aircraft Systems and Manufacturing Inc.
-
03/24/2025
STC ST03885AT
Installation of an Avionica, Inc. avCM Cellular Module
Aircraft Systems and Manufacturing Inc.
-
08/27/2024
STC ST01936WI
Installation of LED lights
AeroLED's Holdings LLC
-
07/27/2024
STC ST01138DE
Installation of MidContinent MD23 standby altimeter and/or attitude indicators
Butler National Corporation
-
07/02/2024
STC ST01138DE
Installation of MidContinent MD23 standby altimeter and/or attitude indicators
Cert Works LLC
-
05/13/2024
STC ST03424CH
Certification of Automatic Dependent Surveillance - Broadcast (ADS-B) Out System with Rockwell Collins TDR-94/-94D Transponders
CMD Flight Solutions LLC
-
01/10/2024
STC ST04393CH
Avionics upgrade installation of a Garmin GTN (TM) 750 Touchscreen Navigator interfaced to existing pilot side instruments and existing FC-200 or FC-530/-550 Autopilot and added GW…
Royal Air Inc.
-
12/05/2023
STC ST04575AT
Installation of the Rockwell Collins ALT-1000+/ -4000+ with 5G Filtering
Chippewa Aerospace Inc.
-
11/22/2023
STC ST03885AT
Installation of an Avionica, Inc. avCM Cellular Module
Archeion Holdings LLC
-
06/09/2023
STC ST02472AT
Installation of a mini Quick Access Recorder (QAR) model MKI, MKII, or MKIII
Archeion Holdings LLC
-
06/09/2023
STC ST02472AT
Installation of a mini Quick Access Recorder (QAR) model MKI, MKII, or MKIII
Archeion Holdings LLC
-
04/13/2023
STC ST01070DE
Installation of the Curtiss-Wright Fortress Flight Data Recorder (with Cockpit Voice Recorder)
Peregrine
-
02/22/2023
STC ST00098IB
Introduction of ADS-B Out
STC Twenty One Limited
-
12/02/2022
STC ST02004WI
Installation of the Garmin GI-275 Instantaneous Vertical Speed Indicators (IVSI)
Peregrine
-
07/22/2022
STC ST02893AT
Installation of a Boom Beam Taxi/Landing Light System
Whelen Aerospace Technologies
-
06/22/2022
STC ST02893AT
Installation of a Boom Beam Taxi/Landing Light System
Whelen Aerospace Technologies
-
02/17/2022
STC ST03885AT
Installation of an Avionica, Inc. avCM Cellular Module
Archeion Holdings LLC
-
02/17/2022
STC ST03885AT
Installation of an Avionica, Inc. avCM Cellular Module
Archeion Holdings LLC
-
02/17/2022
STC ST03885AT
Installation of an Avionica, Inc. avCM Cellular Module
Archeion Holdings LLC
-
12/16/2021
STC ST01936WI
Installation of LED lights
Aero LEDs LLC
-
05/14/2021
STC ST04208NY
Installation of LAI Windowshields
Lee Aerospace Inc.
-
04/23/2021
STC ST04177AT
Installation of a Talon Aerospace LED Replacement General Purpose Lamps
Aaxico Technical Services Inc.
-
04/03/2020
STC ST11069SC
Installation of Sky Connect Forte'/AirMail Wi-Fi (Wireless) communication system
Honeywell International Inc
-
02/28/2020
STC ST04447CH
Installation of Garmin GTS (TM) 8000 TCAS/ACAS II Traffic Surveillance system, dual GTX (TM) 3000 Mode-S Extended Squitter Transponders and GDL® 88 receiver for a complete ADS-B In…
Royal Air Inc
-
02/27/2020
STC ST04393CH
Avionics upgrade installation of a Garmin GTN (TM) 750 Touchscreen Navigator interfaced to existing pilot side instruments and existing FC-200 or FC-530/-550 Autopilot and added GW…
Royal Air Inc
-
01/31/2020
STC ST02635LA
Modification to replace the existing Mode S Transponder system with the ACSS NXT-600 Mode S Transponder with ADS-B Out
Aviation Communication and Surveillance Systems (ACSS) LLC
-
01/27/2020
STC ST04447CH
Installation of Garmin GTS (TM) 8000 TCAS/ACAS II Traffic Surveillance system, dual GTX (TM) 3000 Mode-S Extended Squitter Transponders and GDL® 88 receiver for a complete ADS-B In…
Royal Air Inc
+ 141 more STCs on file
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for GATES LEARJET CORP 55C
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 6 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 |
|---|---|---|---|---|
| N143LJ | SC | — | · | Look up ↗ |
| N178AM | UT | — | · | Look up ↗ |
| N263MS | FL | 1989 | · | Look up ↗ |
| N322GC | IN | 1990 | · | Look up ↗ |
| N518SB | MN | 1979 | · | Look up ↗ |
| N552TL | PA | 1989 | · | 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 →