Learjet 31 (certified family) airworthiness directives

• 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 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 2005-13-36

  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 2000-15-09

  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 99-23-19

  Effective 1999-12-21

  Learjet Model 31, 31A, 35, 35A, and 60 Airplanes

  To prevent failure of the spoiler actuator, which could result in the spoiler panel floating and inducing an uncommanded roll of the airplane.

  Model 31 and 31A airplanes, serial numbers 31- 033, 31-105, 31-114, 31-126, and 31-150 through 31-161 inclusive; Model 35 and 35A airplanes, serial numbers 35-065, 35-242, 35-300, 35-323, 35-447, 35-622, and 35-670; and Model 60 airplanes, serial numbers 60-029, 60-050, 60-120 through 60-139 inclusive; certificated in ...

• 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 99-16-03

  Effective 1999-09-07

  Learjet Model 23, 24, 25, 28, 29, 31, 55, and 60 Series Airplanes

  To prevent undetected accretion of ice on the leading edge of the horizontal stabilizer, which could result in the loss of pitch control and consequent reduced controllability of the airplane.

  Model 23, 24, 25, 28, 29, 31, 55, and 60 series airplanes; as listed in Learjet Service Bulletins SB 23/24/25-30-3, SB 28/29-30-3, SB 31-30-05, SB 55-30-3, and SB 60-30-4, all dated October 27, 1998; certificated in any category.

• AD 98-06-28

  Effective 1998-04-24

  Learjet Model 31 and 35A Airplanes

  To prevent electrical arcing and consequent fire hazard.

  Model 31 airplanes having serial numbers 31-002 through 31-029 inclusive, and Model 35A airplanes having serial numbers 35-647 through 35-670 inclusive; certificated in any category.

• 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 96-11-07

  Effective 1996-06-28 · superseded or removed

  Learjet Model 31 and 35A Airplanes

  To prevent electrical arcing and subsequent fire hazard.

  Model 31 airplanes having serial numbers 31-002 through 31-029 inclusive, and Model 35A airplanes having serial numbers 35-647 through 35-670 inclusive; certificated in any category.

• 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 95-20-03

  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 94-01-06

  Airworthiness Directives: Rockwell International, Collins Air Transport Division, Traffic Alert and Collision Avoidance System II Processors

  To prevent collisions or near misses caused by incompatibility between the traffic alert and collision avoidance system (TCAS) II processors and the current air traffic control system.

  Traffic Alert and Collision Avoidance System II processors that are installed on, but not limited to the following airplanes (all serial numbers), certificated in any category: General Aviation Airplanes Astra Model 1125 airplanes BAC Model 1-11 airplanes British Aerospace Model 125-800 airplanes Beech Models C90A, B20...

• 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 31 (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.