AD/LJ45/7 - Main Landing Gear Trunnion Shear Pins (Cth)

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Learjet 45 Series Aeroplanes

AD/LJ45/7 Main Landing Gear Trunnion Shear Pins 11/2003 DM

Applicability: Model 45 aircraft, serial numbers 45-005 through 45-208, 45-210 through 45-222, 45- 224, 45-225, 45-227, and 45-229 through 45-231.

Requirement: 1. Revise the airworthiness limitations (AWL) section of the Instructions for Continued Airworthiness by inserting the instructions for Inspection Reference Numbers (IRN) J3220041, J3220042, and J3220043 (shear pins); as specified on page 2 of Chapter 4-11-00, Revision 32, dated 13 June 2003, of the Learjet 45 Maintenance Manual; into the AWL section. Thereafter, unless FAA approved, no alternative replacement interval may be approved for the shear pins in the trunnion assemblies of the main landing gears.

2. Replace the shear pins, having part number 4532103015-001V1088, 4532103015-003, 4532103025-001V1088, or 4532103026-001V1088, located in the trunnion assemblies of the main landing gears with new, improved shear pins (including re-identifying the trunnion assemblies); in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 45-57-6, dated 9 June 2003.