COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety 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 revokes Airworthiness Directive (AD) AD/B737/200 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.
Boeing 737 Series Aeroplanes
AD/B737/200
Amdt 1
Outboard Mid-Flap Carriage Spindle 2/2004
Applicability: All Model 737-100, -200, -200C, -300, -400, and -500 series aircraft.
Requirement: Inspect in accordance with the technical requirements of FAA AD 2003-24-08 Amdt 39-13377.
Note: Boeing Alert Service Bulletins 737-57A1277 and 737-57A1277 Revision 1 refer.
Compliance: As specified in the Requirement document, with a revised effective date of 19 February 2004.
This Amendment becomes effective on 19 February 2004.
Background: The FAA has received reports of fractures of the carriage spindles of the outboard mid-flaps on certain Model 737 aircraft. The fractures resulted from stress-corrosion cracking. In a recent incident, dual failure of the carriage spindles occurred and one of the spindles failed at a location critical for continued flap functionality. If both the inboard and outboard spindles fracture in the critical section on an outboard flap, it could result in loss of controllability of the aircraft.
Amendment 1 is issued in response to a new FAA AD, which requires repetitive gap checks of the inboard and outboard carriage of the outboard mid-flaps; and also reduces the interval for the existing inspections and revises the overhaul procedures.
David Villiers
Delegate of the Civil Aviation Safety Authority 7 January 2004
The above AD is notified in the Commonwealth of Australia Gazette on 28 January 2004.
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