Learjet 36 (certified family) airworthiness directives

• AD 2022-05-01

  Effective 2022-03-09

  Learjet, Inc., Airplanes

  This AD was prompted by a report indicating that a repair station performed a life extension program on spoiler assemblies that had reached or were close to reaching their life limit.

  This AD applies to Learjet, Inc., Model 35, 35A (C-21A), 36, 36A, 55, 55B, 55C, and 60 airplanes, certificated in any category, with any spoiler assembly that meets any of the criteria identified in paragraph (c)(1) or (2) of this AD. (1) The spoiler assembly's life limit was extended by Restored Aircraft Sales and Ser...

• AD 2010-06-11

  Effective 2010-04-21

  Honeywell International Inc. TFE731 Series Turbofan Engines

  We are issuing this AD to prevent an uncontained failure of a second stage LPCR disc and/or a third stage LPCR disc due to cracks in the bore, which could result in damage to the airplane.

  This AD applies to Honeywell International Inc. TFE731-2, TFE731-2A, TFE731-2C, TFE731-3, TFE731-3A, TFE731-3AR, TFE731-3B, TFE731-3BR, TFE731-3C, TFE731-3CR, TFE731-3D, TFE731-3DR, TFE731-3R, TFE731-4, TFE731-4R, TFE731-5, TFE731-5AR, TFE731-5BR, and TFE731-5R series turbofan engines with certain second stage low-pres...

• AD 2006-16-18

  Effective 2008-07-18

  Sandel Avionics Incorporated Model ST3400 Terrain Awareness Warning System/Radio Magnetic Indicator (TAWS/RMI) Units Approved Under Technical Standard Order(s) C113, C151a, or C151b; Installed on Various Small and Transport Category Airplanes

  We are issuing this AD to prevent a bearing error, which could lead to an airplane departing from its scheduled flight path, which could result in a reduction in separation from, and a possible collision with, other aircraft or terrain.

  This AD applies to Sandel Avionics Incorporated (Sandel) Model ST3400 terrain awareness warning system/radio magnetic indicator (TAWS/RMI) units approved under Technical Standard Order(s) C113, C151a, or C151b; as identified in Sandel ST3400 Service Bulletin SB3400-01, Revision B, dated September 15, 2004; as installed...

• AD 2008-02-19

  Effective 2008-03-06

  Honeywell International Inc. TFE731-2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, -20R, -20AR, -20BR, -40, -40AR, -40R, and -60 Series Turbofan Engines

  We are issuing this AD to prevent uncontained failure of the HP turbine rotor assembly, which could result in damage to the airplane.

  This AD applies to Honeywell International Inc. (Honeywell) TFE731-2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, - 20R, -20AR, -20BR, -40, -40AR, -40R, and -60 series turbofan engines with certain high pressure (HP) turbine rotor discs part numbers and serial numbers. These engines are installed on, but no...

• AD 2007-17-17

  Effective 2007-10-02

  Learjet Model 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C Airplanes, and Model 45 Airplanes

  We are issuing this AD to prevent penetration of flammable liquids or fire through the engine firewall into the engine pylon, which could lead to fire inside the airplane.

  This AD applies to Learjet Model 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C airplanes, and Model 45 airplanes; certificated in any category; as identified in the service information specified in Table 1 of this AD. Table 1.--Applicable Service Information Learjet airplane model Service Bulletin Revision level ...

• AD 2007-04-18

  Effective 2007-03-23

  Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C Airplanes

  We are issuing this AD to prevent this inadvertent operation, which could result in inadvertent fuel transfer by the left or right wing fuel system and subsequent over-limit fuel imbalance between the left and right wing fuel loads.

  This AD applies to the Learjet models identified in the applicable Bombardier service bulletin listed in Table 1 of this AD. Table 1.--Applicability by Service Bulletin Bombardier service bulletin Revision level Date Learjet model(s) SB 23-28-6: Original: April 21, 1998: 23. SB 24/25-28-3: 2: February 21, 1998: 24, 24A...

• AD 2005-16-09

  Effective 2005-09-13 · recurring

  Learjet Model 23, 24, 25, 35, and 36 Airplanes

  We are issuing this AD to prevent significant reduction in the lateral control of the airplane due to imbalance of the fuel loads in the wings of the airplane.

  This AD applies to the airplanes in Table 1 of this AD, certificated in any category. Table 1.--Applicability Learjet-- Serial numbers-- Model 23 airplanes: 23-003 through 23-090 inclusive. Model 24 airplanes: 24-100 through 24-357 inclusive. Model 25 airplanes: 25-002 through 25-373 inclusive. Model 35 airplanes: 35-0...

• AD 2005-13-36

  Effective 2005-08-09

  Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), and 36 Airplanes

  This AD was prompted by a report indicating that an aileron cable failed on one affected airplane when the cable underwent a tension check.

  This AD applies to Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), and 36 airplanes; certificated in any category; as identified in the Bombardier alert service bulletins in Table 1 of this AD. Table 1.--Service Bulletins Bombardier...

• AD 2005-13-07

  Effective 2005-07-27

  Honeywell International Inc. (Formerly AlliedSignal Inc. and Garrett Turbine Engine Co.) TFE731-2 and -3 Series Turbofan Engines

  We are issuing this AD to prevent LP turbine rotor disk separation, which could result in an uncontained engine failure and damage to the airplane.

  This AD applies to Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Co.) TFE731-2 and -3 series turbofan engines with the following low pressure (LP) 1st and 2nd stage turbine rotor disc part numbers (P/Ns), with serial numbers (SNs) listed in Tables 1, 2, and 3 of Honeywell Internati...

• AD 2005-05-15

  Effective 2005-04-18 · recurring

  Honeywell International Inc. TFE731-2 and -3 Series Turbofan Engines

  We are issuing this AD to prevent uncontained failure of the LPT stage 1 disk, and possible damage to the airplane.

  This AD applies to Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Co.) TFE731-2 and -2C series, and TFE731-3, -3A, -3AR, -3B, -3BR, and -3R series turbofan engines, with low pressure turbine (LPT) stage 1 disks, part numbers (P/Ns) 3072070-All, 3072351-All, 3073013-All, 3073113-All,...

• AD 2004-03-08

  Effective 2004-03-15 · recurring

  Learjet Model 31, 31A, 35, 35A (C-21A), 36, and 36A Airplanes

  To prevent significant structural damage to the engine pylons, possible separation of the engines from the fuselage, and consequent reduced controllability of the airplane.

  The following airplanes, certificated in any category, as applicable: Table 1.--Applicability As Listed in Bombardier Service Bulletin-- Model-- 31 and 31A Airplanes: 31-51-2, dated February 1, 2001; and 31- 51-3, Revision 1, dated August 2, 2001. 35, 35A (C-21A), 36 and 36A 35/36-51-3, dated February 1, 2001; and Airp...

• AD 2001-23-09

  Effective 2001-12-21

  Honeywell International Inc. TFE731-2, -3, and -4 Series Turbofan Engines

  To prevent failure of the fan rotor disc due to fatigue cracking in the dovetail slots, which could result in in-flight engine shutdown, uncontained engine failure, and damage to the airplane.

  This airworthiness directive (AD) is applicable to Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Co.) TFE731-2, -3, and -4 series turbofan engines, with fan rotor discs part numbers (P/N's) 3072162-All, 3072816-All, 3073436- All, 3073539-All, and 3074529-All (where All denotes all ...

• AD 2001-07-11

  Effective 2001-05-01

  Learjet Model 23, 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes

  All Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D- A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A military), 36, 36A, 55, 55B, and 55C airplanes; certificated in any category.

• AD 2000-24-19

  Effective 2001-01-04

  Learjet Model 35, 35A, 36, and 36A Series Airplanes

  To prevent incapacitation of the flightcrew and consequent loss of control of the airplane due to delays in donning oxygen masks in response to the activation of the cabin altitude warning horn.

  Model 35, 35A, 36, and 36A series airplanes, certificated in any category.

• AD 2000-15-09

  Effective 2000-10-10 · recurring

  Honeywell International Inc. TFE731-2, -3, -4, and -5 Series Turbofan Engines

  To prevent failure of the HPC impeller due to fatigue cracking.

  Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Company) TFE731-2, -3, -4, and -5 series turbofan engines with high pressure compressor (HPC) impeller part numbers (P/Ns) 3073393-1, 3073394-1, 3073433-1, 3073434-1, 3073398- All (All denotes all dash numbers), 3073435-All, and 3075171...

• AD 98-17-01

  Effective 1999-11-29

  AlliedSignal Inc. TFE731 Series Turbofan Engines

  To prevent cracked fuel tubes and the subsequent leakage of fuel on and around electrical components, which can cause an engine fire.

  AlliedSignal Inc. (formerly Allied-Signal Aerospace Company, Garrett Engine Division and Garrett Turbine Engine Co.) TFE731-2, -3, and -4 series turbofan engines with fuel tubes, part numbers (P/Ns) 3071051-1, 3073729-1, or 3072886-1, installed. These engines are installed on but not limited to the following airplanes:...

• AD 96-19-13

  Effective 1996-10-22

  Gates Learjet Model 35 and 36 Series Airplanes Modified by Raisbeck Supplemental Type Certificate (STC) SA766NW

  To prevent deterioration of the airplane's lateral control characteristics as a result of aileron buffet or buzz.

  Model 35, 35A, 36, and 36A series airplanes; certificated in any category; that have been modified in accordance with Raisbeck Group Supplemental Type Certificate (STC) SA766NW, and that do not have one of the airplane serial numbers listed in Table 1 of this AD. Table 1.--Serial Numbers* NOT affected by this AD 35-023...

• AD 96-18-13

  Effective 1996-11-12

  AlliedSignal Inc. TFE731 Series Turbofan Engines

  To prevent uncontained failure of the fan rotor disk due to fatigue cracking in the dovetail slots, which can result in inflight engine shutdowns, severe secondary damage, and fan rotor assembly separation from the engine.

  AlliedSignal Inc. (formerly Garrett Engine Division) Models TFE731-2, -2A, -3, -3A, -3AR, -3B, -3BR, -3C, -3CR, -3D, -3DR, -3R, and -4R turbofan engines, installed on, but not limited to the following aircraft: Avions Marcel Dassault Falcon 10, 50, 100 series; Learjet 31, 35, 36, and 55 series; Lockheed-Georgia 1329-23...

• AD 96-05-03

  Effective 1996-04-02 · recurring

  AlliedSignal Inc. TFE731 Series Turbofan Engines

  To prevent uncontained failure of fan rotor disks due to fatigue cracking in the dovetail slots, which can result in inflight engine shutdowns, severe secondary damage, and fan rotor assembly separation from the engine.

  AlliedSignal Inc. (formerly Garrett Engine Division) TFE731-2, -2A, -3, -3A, -3AR, -3B, -3BR, -3C, -3CR, -3D, - 3DR, -3R, and -4R series turbofan engines with fan rotor disk part numbers (P/N's) 3072162-1 through -5, 3072816-1, -2, and -3, 3073436-1 through -5, 3073539-(All), and 3074529-(All), where (All) denotes any ...

• AD 96-04-01

  Effective 1996-03-15

  AlliedSignal Inc. TFE731 Series Turbofan Engines

  To prevent an uncontained failure of the fan rotor disk due to fatigue cracking in the dovetail slots, which can result in inflight engine shutdowns, severe secondary damage, and fan rotor assembly separation from the engine.

  AlliedSignal Inc. (formerly Garrett Engine Division) TFE731-2, -2A, -3, -3R series turbofan engines with fan rotor disks, part numbers (P/N's) 3072162-1 through -4, 3073436-1 through -4, 3073539-2, and 3074529-2, installed on, but not limited to: Avions Marcel Dassault Falcon 10, 50, 100 series; Learjet 31, 35, 36 seri...

• AD 95-25-03

  Effective 1995-12-27 · superseded or removed

  Learjet Model 23, 24, 25, 35, and 36 Airplanes

  To prevent imbalance of the fuel loads in the wings of the airplane, which can significantly reduce lateral control of the airplane.

  Model 23, 24, and 25 airplanes, as listed in Learjet Service Bulletin SB 23/24/25-28-2, dated October 6, 1995, and Model 35 and 36 airplanes, as listed in Learjet Service Bulletin 35/36-28-10, dated October 6, 1995; certificated in any category.

• AD 95-22-01

  Effective 1995-12-04 · recurring

  Aerospace Lighting Corporation Power Units and Power Supplies

  To prevent smoke, fire, electrical shock, and possible electromagnetic interference caused by high voltage arcing in the cabin which, if undetected, could result in personal hazard or loss of the aircraft.

  Aerospace Lighting Corporation (ALC) lamp connectors, Part Number (P/N) 31.85.1.A; Series 66 fluorescent lamps; power units, P/N's TR-991, TR-992, AL-0546, and AL-0514; and power supplies, P/N's 1895D and AL-0598. These products are utilized in cabin fluorescent lighting systems, and are installed on, but not limited t...

• AD 95-20-03

  Effective 1995-11-02

  Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes

  To prevent rapid decompression of the airplane due to cracking and subsequent failure of certain outflow/safety valves.

  Model 24, 25, 28, 29, 31, 35, 36, and 55 series airplanes having airplane serial numbers listed in the Learjet service bulletins listed below; and equipped with Allied Signal outflow/safety valves, number 130406-1 or 102850-5, as identified in Allied Signal Aerospace Alert Service Bulletin 130406-21-A4011, Revision 3, ...

• AD 95-19-04

  Effective 1995-10-12 · superseded or removed

  Learjet Model 35, 35A, 36, 36A, 55, 55B, and 55C Airplanes

  To prevent excessive deviation from the intended flight path which, if the aircraft is on an extended overwater operation, may lead to a potential low-fuel condition or a traffic conflict operation.

  This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is...

• AD 93-25-16

  Effective 1994-01-18 · superseded or removed

  Allied-Signal Aerospace Company, Garrett Engine Division, TFE731 Series Turbofan Engines

  To prevent an uncontained fan disk failure.

  Allied-Signal Aerospace Company, Garrett Engine Division, TFE731-2, -3, and -3R series turbofan engines installed on but not limited to Sabreliner NA-265-65 (Sabreliner 65); Israel Aircraft Industries 1124 series (Westwind); Avions Marcel Dassault Falcon 10, 50, 100 series; Learjet 35, 36, and 31 (M31) series; British ...

Learjet 36 (certified family): price, specs and every tail

AD data from the Federal Register and the FAA. Data: Radar, FAA aircraft registry file of 2026-10-09.