AD/B737/282 Outboard Midflap Carriage Spindles (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 39.001(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.

Boeing 737 Series Aeroplanes

AD/B737/282 Outboard Midflap Carriage Spindles 4/2006

Applicability:

Model 737-100, -200, and -200C series aircraft, without high gross weight flaps installed.

Requirement:

Action in accordance with the technical requirements of FAA AD 2001-16-11
Amdt 39-12380.

Note:  Boeing Alert Service Bulletin 737-57A1256 refers.

Compliance:

Before 13 May 2006, unless already accomplished.

This Airworthiness Directive becomes effective on 13 April 2006.

Background:

This Directive requires inspection of the carriage spindles on the outboard midflap for circumferential score marks, and any necessary rework or replacement.  The actions required by this Directive are intended to prevent severe flap asymmetry due to fractures of both carriage spindles at an outboard midflap, which could result in loss of controllability of the aircraft.

David Punshon
Delegate of the Civil Aviation Safety Authority

1 March 2006