Commonwealth legislation

AD/DHC-3/34 Amdt 1 - Tailplane Main Rib Forward Flange and Forward Lower Flange

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Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

This amendment requires all DHC‑3 (Otter) operators to inspect the tailplane main rib forward flange and forward lower flange following Bombardier Service Bulletin 3/46 Rev E. Inspections must be completed by 7 October 2000 (unless done within the prior 12 months) and then every two years until Modification 3/935 (SB 3/50) is installed as terminating action to prevent rib failure that could compromise the tailplane attachment.

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AD/DHC-3/34 Amdt 1 - Tailplane Main Rib Forward Flange and Forward Lower Flange

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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DHC-3 (Otter) Series Aeroplanes

AD/DHC-3/34

Amdt 1

Tailplane Main Rib Forward Flange and Forward Lower Flange

10/99

Applicability: All Model DHC-3 aircraft.

Requirement: Action in accordance with Bombardier Regional Aircraft Service Bulletin (SB) 3/46 Revision E.

Compliance: Unless accomplished in the 12 months prior to 7 October 1999, before 7 October 2000; thereafter at intervals not to exceed 2 calendar years, until Modification 3/935 (SB 3/50) is incorporated.

This Amendment becomes effective on 7 October 1999.

Background: The manufacturer received reports of the tailplane centre section main rib cracking at the main rib forward and forward lower flange radii. Such cracking could lead to failure of the rib structure supporting the tailplane front attachment fitting.

Amendment 1 is issued to introduce a modification which constitutes terminating action to the repetitive inspection requirements of this Directive.

The original issue of this Airworthiness Directive became effective on 17 May 1990.

Source text

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

1 AD/DHC-3/34 Amdt 1 - Tailplane Main Rib Forward Flange and Forward Lower Flange