Commonwealth legislation

AD/SF340/59 Amdt 1 - Flap Support Strap

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

What it does: Requires operators of specified SAAB SF340A/340B aeroplanes to inspect and, if necessary, repair or modify the flap support strap and the forward spar per SAAB Service Bulletin 340-57-033 Revision 2.

Who it affects and why it matters: CASA enforces this airworthiness directive for aircraft listed by serial number because cracking was found in the flap spar and support strap; operators pay for inspections, repairs and any resulting downtime. Compliance deadlines depend on scheduled inspections and accumulated flight counts.

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Current sections

Direct links to the current provisions in AD/SF340/59 Amdt 1 - Flap Support Strap.

AD/SF340/59 Amdt 1 - Flap Support Strap

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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SAAB SF340 Series Aeroplanes

AD/SF340/59

Amdt 1

Flap Support Strap 6/98

Applicability: Model SF340A with serial numbers SF340A-004 through -159.

Model 340B with serial numbers 340B-160 through -384, -386 through -404, -406

through -408, and -410 through -413.

Requirement: Action in accordance with SAAB Service Bulletin 340-57-033 Revision 2.

Note: LFV AD 1-117R1 refers.

Compliance: At the next scheduled structural inspection of the flap (refer to the MRB report), or within 3000 flights after 21 May 1998, whichever occurs later.

For flaps that have accumulated more than 16,000 flights (inspection threshold in the MRB) an external and internal visual inspection has to be performed within 1500 flights after 21 May 1998, unless the flap has been modified within that period.

This amendment becomes effective on 21 May 1998.

Background: During a scheduled inspection of the flap structure of an aircraft, it was found that the forward lower spar cap had cracked at WS 142. The crack was discovered in the radius of the spar cap extending in a spanwise direction. When the spar was being repaired, it was found that the support strap connecting the flap actuator fitting to the forward spar web, was cracked.

Amendment 1 is issued in response to a revision of the related LFV AD which introduces a later issue of the Requirement document, which clarifies the procedure and the AD compliance times.

The original issue of the airworthiness directive became effective on 14 August 1997.

Source text

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

1 AD/SF340/59 Amdt 1 - Flap Support Strap