Commonwealth legislation

AD/JT9D/19 Amdt 2 - Surge Margin Improvements

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Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

This AD requires operators of Pratt & Whitney JT9D-7R4D and -7R4E engines on Boeing 767s to comply with the actions in FAA AD 90-14-08 (paragraphs (a)–(i)) to improve engine surge margin. For one sub-item (FAA AD 90-14-08(d)(2)), compliance may alternatively follow Pratt & Whitney PWA SB JT9D-7R4-75-101. It took effect 4 March 1993 and places the compliance burden on operators.

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AD/JT9D/19 Amdt 2 - Surge Margin Improvements

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Pratt and Whitney Turbine Engines - JT9D Series

AD/JT9D/19

Amdt 2

Surge Margin Improvements 3/93

Applicability: JT9D-7R4D, E series engines installed in Boeing B767 aircraft.

Requirement: Action in accordance with FAA Airworthiness Directive 90-14-08, paragraphs (a), (b), (c), (d), (e), (f), (g), (h) and (i).

For the purpose of this Directive, compliance with the requirements of PWA SB JT9D-7R4-75-101 is deemed to be an alternative method of compliance with the requirements of FAA AD 90-14-08, paragraph (d), (2).

Compliance: As detailed in the requirement document, with an effective date of 4 March 1993.

Background: This Directive has been amended to reflect the release of an additional procedure which, if incorporated, will improve the JT9D-7R4 surge margin.

Source text

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

1 AD/JT9D/19 Amdt 2 - Surge Margin Improvements