Commonwealth legislation

AD/SF340/82 - DC Test Switches

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

Requires owners/operators of specified SAAB SF340A and 340B aeroplanes (S/N 004–159 and 160–379) to modify the DC electrical over‑voltage/feeder test circuit in accordance with Saab Mandatory Service Bulletin SAAB 340‑24‑023 Revision 2. The modification is intended to make the DC generator system more resistant to lightning strikes and reduce the need for manual resets. Compliance is required within 5000 hours time in service after the AD or by 21 February 2004.

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Current sections

Direct links to the current provisions in AD/SF340/82 - DC Test Switches.

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 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.

SAAB SF340 Series Aeroplanes

AD/SF340/82 DC Test Switches 2/2002

Applicability: Model SF340A aeroplanes, serial numbers (S/N) 004 through 159 inclusive and Model 340B aeroplanes S/N 160 through 379 inclusive.

Requirement: Modify the DC electrical over voltage/feeder test circuit in accordance with Saab Aircraft AB Mandatory Service Bulletin SAAB 340-24-023 Revision 2 dated 15 November 2001.

Note: LFV AD 1-169 refers.

Compliance: Within 5000 hours time in service after the effective date of this Directive, but no later than 21 February 2004.

This Airworthiness Directive becomes effective on 21 February 2002.

Background: The Swedish Luftfartsverket has advised there have been instances on Saab 340 aeroplanes where, during a lightning strike, the two DC generators have dropped off line. This has required the DC generators to be manually reset to bring them on line, which increases pilot workload. Additionally there have been some instances where manual reset did not appear to correct the malfunction.

This Directive introduces a modification that is intended to make the DC generator system more resistant to lightning strikes.

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

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 14 January 2002

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 30 January 2002.

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 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.

SAAB SF340 Series Aeroplanes