Commonwealth legislation

AD/JT9D/15 - High Pressure Turbine Airseal

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Commonwealth

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legislative instrument

Plain English Summary

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This AD requires owners/operators of Pratt & Whitney JT9D-7R4D and -7R4E engines to carry out the Accomplishment Instructions in P&W Service Bulletin JT9D-7R4-72-318 for inspection and modification of the stage 1–2 high‑pressure turbine airseal. Compliance, scheduled under a program agreed with the Secretary, is intended to prevent airseal cracking; implementation costs and downtime fall to the operators.

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AD/JT9D/15 - High Pressure Turbine Airseal

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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/15 High Pressure Turbine Airseal 12/86

Applicability: JT9D-7R4D, E models.

Requirement: Carry out the requirements of Pratt and Whitney ASB JT9D-7R4-72-318, Paragraph 2 "Accomplishment Instructions".

Compliance: According to a program agreed to by the Secretary. Effective: 1 December 1986.

Background: This Directive has been issued to require compliance with the Accomplishment Instructions of P.W.A. A.S.B. JT9D-7R4-72-318. The A.S.B. details inspection and modification of the high pressure turbine to preclude cracking of the stage 1-2 airseal.

Source text

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