Commonwealth legislation

AD/B747/250 Amdt 1 - Thrust Reverser

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive requires Boeing 747 operators to fit additional thrust-reverser locking systems or to rely on prior installations done under specified Boeing service bulletins as terminating compliance. It also mandates recurrent functional tests at intervals not exceeding 4,000 flight hours and sets specific deadlines for compliance (e.g. before issue of a Certificate of Airworthiness or before further flight) (see "Terminating Action" and "Compliance").

Operators and maintenance organisations bear the cost and operational impact of installations and recurring tests; the Civil Aviation Safety Authority enforces compliance. The stated purpose is to prevent inadvertent in-flight thrust-reverser deployment.

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Current sections

Direct links to the current provisions in AD/B747/250 Amdt 1 - Thrust Reverser.

Terminating Action

Installation of the additional locking systems accomplished prior to the effective date of this Directive in accordance with Boeing SB 747-78-2155, Revision 1. dated 30 January 1997, satisfy the requirements of Requirement 1(a).

Installation of the additional locking systems accomplished prior to the effective date of this Directive in accordance with Boeing SB 747-78-2154, Revision 1. dated 2 November 1995 and Revision 2, dated 31 October 1996, satisfy the requirements of Requirement 1(d).

Boeing 747 Series Aeroplanes

AD/B747/250 Amdt 1 (continued)

For aeroplanes having line numbers 1067 and higher on which the intent of Boeing SB 747-78- 2155, Revision 2. dated 5 November, 1998, was accomplished during production, accomplishment of the repetitive functional tests required by Requirement 4 of this Directive is terminating action for the repetitive inspections and functional tests required by Requirement 1 of AD/B747/277.

Accomplishment of the requirements of this Directive is also terminating action for the repetitive inspections and functional tests required by Requirement 1 of AD/B747/277.

Note: FAA AD 2001-12-21 Amendment 39-11799, and 94-15-05 Amendment 39-8976 refer.

Compliance: For Requirement 1: Prior to issue of Certificate of Airworthiness. For Requirement 2: Prior to issue of Certificate of Airworthiness. For Requirement 3: Prior to further flight.

For Requirement 4: At intervals not exceeding 4000 hours time- in-service. This Amendment becomes effective on 5 September 2002.

Background: This amendment includes a number of editorial and technical changes to better represent the requirements of FAA AD 2000-12-21. This Directive was issued to prevent inadvertent deployment of the thrust reverser during flight and consequent reduced controllability of the aeroplane.

The original issue of this Airworthiness Directive became effective on 9 August 2001.

Signature of Eugene Paul Holzapfel, Delegate of the Civil Aviation Safety Authority.

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 25 July 2002

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 14 August 2002.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

Terminating Action Terminating Action