AD/LJ45/4 Amdt 1 - Cockpit Foot Warmer (Cth)

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/LJ45/4 and issues the following 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/LJ45/4 Amdt 1

Cockpit Foot Warmer 3/2004

Applicability: Model 45 aeroplanes, serial numbers 45-005 through 45-213 inclusive.

Requirement: 1. Unless already accomplished in accordance with AD/LJ45/4 original issue, pull (open) the FOOT WARM circuit breaker, located on the copilot's circuit breaker panel, and install a collar on the FOOT WARM circuit breaker, per Bombardier Aerospace Learjet Alert Service Bulletin SB A45-21-14, dated 3 May 2002.

2. Reactivate the foot warmer system by removing the collar and closing the FOOT WARM circuit breaker.

Note 1: FAA AD 2002-17-01 Amdt 39-12866 and FAA Small Airplane Directorate Alternate Method of Compliance (AMOC) letter dated 5 November 2003 refer. The FAA AMOC letter is included in Bombardier Aerospace Advisory Wire 21-006.

Compliance: For Requirement 1 - As of the effective date of this Amendment.

For Requirement 2 - Following the optional replacement/modification of the pilot and co-pilot heel plate assemblies in accordance with Bombardier Aerospace Learjet Service Bulletin SB 45-21-15.