Learjet 55 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 2009-03-01

  Effective 2009-03-05

  Learjet Model 55, 55B, and 55C Airplanes

  We are issuing this AD to detect and correct improper installation of the lavatory light assembly, which could result in contact between the electrical terminals of the light assembly and an adjacent oxygen supply line, and consequent short circuit or fire hazard.

  This AD applies to Learjet Model 55, 55B, and 55C airplanes, certificated in any category; serial numbers 002 through 147 inclusive.

• 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 2005-13-07

  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 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 2001-12-02

  Effective 2001-07-18

  Learjet Model 55 Series Airplanes and Model 60 Airplanes

  Model 55 series airplanes, serial numbers 55-003 through 55-147 inclusive, and Model 60 airplanes, serial numbers 60- 002 through 60-189 inclusive; certificated in any category.

• 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 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 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 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 95-07-02

  Effective 1995-06-19

  AlliedSignal Inc. TFE731-3 Series Turbofan Engines

  To prevent a low pressure turbine (LPT) disk web separation, which may result in an uncontained engine failure and damage to the aircraft.

  AlliedSignal Inc. (formerly Garrett Turbine Engine Company) TFE731-3, -3A, -3AR, -3B, -3BR, and -3R turbofan engine models installed on but not limited to Avions Marcel Dassault Falcon 50, Lockheed 1329-23, -25 series (731 Jetstar, Jetstar II), Israel Aircraft Industries (IAI) Ltd. 1124 (Westwind), Raytheon Corporate J...

• 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...

Learjet 55: price, specs and every tail

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