Commonwealth legislation

AD/JT9D/14 Amdt 1 - Diffuser Case Rear Rail Cracking

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Commonwealth

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legislative instrument

Plain English Summary

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This directive requires operators of JT9D-7, -7A, -7H, -7AH, -7F and -7J engines to inspect the diffuser-case rear rail for cracking per Pratt & Whitney Service Bulletin 5591 Revision 7, effective 27 May 1993. It amends the earlier directive to adopt a new eddy‑current inspection probe and to reduce inspection intervals for diffuser cases with weld repairs in certain locations and for various crack lengths. Operators and maintenance organisations must follow the manufacturer's service bulletin to comply.

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AD/JT9D/14 Amdt 1 - Diffuser Case Rear Rail Cracking

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Pratt and Whitney Turbine Engines - JT9D Series

AD/JT9D/14

Amdt 1

Diffuser Case Rear Rail Cracking 6/93

Applicability: JT9D-7, 7A, -7H, -7AH, -7F, -7J.

Requirement: Inspect the diffuser case rear rail for cracking in accordance with Pratt and Whitney Service Bulletin 5591 Revision 7.

Note: FAA AD 86-11-04 refers.

Compliance: Effective 27 May 1993: As detailed in the requirement document.

Background: This Directive has been amended to reflect the manufacturer's latest revision to the requirement document. The revision, in part, introduces a new Eddy Current Inspection (ECI) probe and reduced inspection intervals for diffuser cases with weld repairs in certain locations and various crack lengths.

Source text

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