Commonwealth legislation

AD/SF340/76 - Aft Attachment Lug of Flap Fittings at WS 123.38

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Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires operators of certain SAAB SF340A and 340B aircraft with specified flap assemblies to inspect and, if necessary, repair the aft attachment lug of flap fittings at wing station 123.38. It mandates visual inspections every 800 flight hours until a non‑destructive (NDT) inspection is performed within 6,000 flight cycles, and requires following SAAB Mandatory Service Bulletin 340‑57‑037 (with SB 340‑57‑038 as terminating action). Operators pay for inspections and repairs; the CASA delegate enforces compliance.

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Direct links to the current provisions in AD/SF340/76 - Aft Attachment Lug of Flap Fittings at WS 123.38.

AIRWORTHINESS DIRECTIVE

View image in the official source

View image in the official source
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 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.

AD/SF340/76 Aft Attachment Lug of Flap F

AD/SF340/76 Aft Attachment Lug of Flap Fittings at WS 123.38 3/2000

Applicability: Model SF340A aircraft, serial numbers 004 through 159, and Model 340B aircraft, serial numbers 160 through 459; with flap assemblies 7257800-501 through -508, and

-851 through -856 installed.

Requirement: Action in accordance with SAAB Aircraft Mandatory Service Bulletin 340-57-037, dated 18 January 2000.

Incorporation of Service Bulletin 340-57-038 is considered terminating action for the inspection requirements of this Directive.

Note 1: LFV AD 1-153 refers.

Compliance: Visual inspection to be accomplished within 800 hours time in service after 23 March 2000. Thereafter at intervals not to exceed 800 hours time in service until the NDT inspection is accomplished.

NDT inspection to be accomplished within 6000 flight cycles after 23 March 2000, thereafter at intervals not to exceed 6000 flight cycles.

This Airworthiness Directive becomes effective on 23 March 2000.

Background: A report was received of the failure of the L-shaped flap fittings due to fatigue. The initial failure occurred in the aft lug where the swaged bushing is installed. Some time after this, a consequent failure occurred in the bottom radius of the adjacent L- shaped fitting, which resulted in a jammed flap condition.

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

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 10 February 2000

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 23 February 2000.

Source text

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

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE

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 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.

AD/SF340/76 Aft Attachment Lug of Flap F AD/SF340/76 Aft Attachment Lug of Flap Fittings at WS 123.38 3/2000

AD/SF340/76 Aft Attachment Lug of Flap Fittings at WS 123.38 3/2000

Applicability: Model SF340A aircraft, serial numbers 004 through 159, and Model 340B aircraft, serial numbers 160 through 459; with flap assemblies 7257800-501 through -508, and

-851 through -856 installed.

Requirement: Action in accordance with SAAB Aircraft Mandatory Service Bulletin 340-57-037, dated 18 January 2000.

Incorporation of Service Bulletin 340-57-038 is considered terminating action for the inspection requirements of this Directive.

Note 1: LFV AD 1-153 refers.

NDT inspection to be accomplished within 6000 flight cycles after 23 March 2000, thereafter at intervals not to exceed 6000 flight cycles.

This Airworthiness Directive becomes effective on 23 March 2000.

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 10 February 2000

The above AD is notified in the Commonwealth of Australia Gazette on 23 February 2000.