AD/B737/199 - Aileron Transfer Mechanism Lower Bearing Support at First Officer Position (Cth)

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES

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 CAR 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.

Boeing 737 Series Aeroplanes

AD/B737/199 Aileron Transfer Mechanism Lower Bearing Support at First Officer Position

12/2002

Applicability: Model 737-100, -200, -200C, -300, -400, and -500 series aircraft, line numbers 1 through 3132.

Requirement: Inspect in accordance with the technical requirements of FAA AD 2002-18-02 Amdt 39-12874.

Note: Boeing Alert Service Bulletin 737-27A1238 refers.

Compliance: As specified in the Requirement document.

This Airworthiness Directive becomes effective on 28 November 2002.

Background: This Directive requires a one-time inspection to determine whether the lo wer bearing support of the aileron transfer mechanism directly below the first officer's control column has a 'pocket', and follow-on corrective actions, if necessary. The actions specified by this Directive are intended to prevent jamming of the first officer's control wheel due to the presence of a foreign object on the lower bearing support of the transfer mechanism, which could result in reduced controllability of the aeroplane.