Commonwealth legislation

AD/PA-38/27 Amdt 2 - Wing Fatigue

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This AD amendment tells owners/operators of Piper PA‑38 (Tomahawk) aeroplanes how to recalculate wing retirement life when an FAA‑approved Supplemental Type Certificate (STC) reinforcement strap is fitted, using a simple formula that deducts 30% of hours accumulated before modification from a 21,950‑hour baseline. It also requires an ongoing inspection every 100 flight hours after installation. The amendment adds contact details for the STC owner to assist with incorporation; it does not change existing technical requirements or compliance times.

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Current sections

Direct links to the current provisions in AD/PA-38/27 Amdt 2 - Wing Fatigue.

New retirement life = 21,950 hrs - ( 0.3

New retirement life = 21,950 hrs - ( 0.3 x hrs accumulated prior to modification )

Note 1: Example 1, an aircraft with 9,000 hours already accumulated without the modification:

New retirement life = 21,950 - (0.3 x 9,000) = 19,250 hours.

Example 2, an aircraft with 11,000 hours already accumulated without the modification:

New retirement life = 21,950 - (0.3 x 11,000) = 18,650 hours.

Note 2: For assistance with incorporating this STC, write to the STC owner, Mr Paul

M. Sterling, 13113 SE 228th Place, Kent, WA, USA, 98031.

Initially, at 100 flight hours after installation of the wing spar strap, then every 100 flight hours thereafter.

Piper PA-38 (Tomahawk) Series Aeroplanes

AD/PA-38/27 Amdt 2 (continued)

This Amendment becomes effective on 13 May 2004.

Background: This AD mandates the replacement requirements and schedule listed in the Maintenance Manual and the Country of Origin FAA Type Certificate Data Sheet.

This amendment includes a note with contact details for the STC owner, so that owners and operators may obtain assistance in incorporating the modification. There is no change to the requirements or compliance.

Amendment 1 provided an option for the incorporation of an FAA approved Supplemental Type Certificate (STC), which provides for a wing spar reinforcement strap to be installed to extend wing life. A formula is also provided so that a new retirement life can be calculated for aircraft that incorporate the modification listed in the STC. An ongoing inspection requirement, which is specified in the STC, is also added for aircraft that have the spar strap installed.

The original issue of this AD became effective on 26 February 1998.

Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.

David Villiers

Delegate of the Civil Aviation Safety Authority 2 April 2004

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 21 April 2004.

Source text

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

New retirement life = 21,950 hrs - ( 0.3 New retirement life = 21,950 hrs - ( 0.3 x hrs accumulated prior to modification )