EASA Regulations for Learjet 55

3 airworthiness directives and regulations affecting Learjet 55.

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New ADs and bulletins for Learjet 55, summarized like the ones below, every Monday.

EASA SIB SAIB-2026-07

Mar 23, 2026

Main Landing Gear Attach Section - Trunnion Pins

The FAA Special Airworthiness Information Bulletin SAIB: 2026-07 addresses the potential improper installation of the aft trunnion pin in the main landing gear of Learjet Model 23, 24, 25, 28, 29, 31, 35, 36, 55, and 60 airplanes. This bulletin informs owners, operators, and maintainers about the risk of main landing gear collapse during taxi, takeoff, or landing due to this issue. It provides recommended inspections and maintenance manual revisions to mitigate the risk.

Safety Information Bulletin
  • Learjet, 23
  • Learjet, 24
  • Learjet, 25
  • Learjet, 28
  • Learjet, 29
  • Learjet, 31
  • Learjet, 35
  • Learjet, 36
  • Learjet, 55
  • Learjet, 60
  • Learjet 23
  • Learjet 24
  • Learjet 25
  • Learjet 28
  • Learjet 29
  • Learjet 31
  • Learjet 35
  • Learjet 36
  • Learjet 55
  • Learjet 60

EASA AD US-2022-05-01

Feb 24, 2022

Wings - Spoiler Assemblies - Removal

Federal Register Volume 87, Number 35 (February 22, 2022) - Airworthiness Directive 2022-05-01 issued by the FAA addresses certain Learjet, Inc. airplanes including Models 35, 35A (C-21A), 36, 36A, 55, 55B, 55C, and 60. This directive targets spoiler assemblies that had their FAA-approved life limits improperly extended by a repair station, posing a safety risk. The AD mandates removal of these spoiler assemblies from service and prohibits their reinstallation to ensure continued airworthiness.

Airworthiness Directive
  • Learjet, 31
  • Learjet, 35
  • Learjet, 36
  • Learjet, 55
  • Learjet, 60
  • Learjet 35
  • Learjet 35A
  • Learjet 36
  • Learjet 36A
  • Learjet 55
  • Learjet 55B
  • Learjet 55C
  • Learjet 60

EASA AD US-2018-19-04

Sep 20, 2018

Flight Controls - Flap Nose Roller Fitting, Nose Roller Support Bracket, and Adjacent Rib Support Structure - Replacement

Federal Aviation Administration Airworthiness Directive 2018-19-04 is a final rule addressing certain Learjet, Inc. Models 28, 29, 31, 31A, 35, 35A, 36, 36A, 55, 55B, 55C, and 60 airplanes. The directive mandates replacement of the flap nose roller fitting, nose roller support bracket, and adjacent rib support structure with improved components to prevent fatigue cracks caused by repetitive flap loads.

Airworthiness Directive
  • Learjet, 28
  • Learjet, 29
  • Learjet, 31
  • Learjet, 35
  • Learjet, 36
  • Learjet, 55
  • Learjet, 60
  • Learjet 28
  • Learjet 29
  • Learjet 31
  • Learjet 31A
  • Learjet 35
  • Learjet 35A
  • Learjet 36
  • Learjet 36A
  • Learjet 55
  • Learjet 55B
  • Learjet 55C
  • Learjet 60