Commonwealth legislation

AD/JT8D/36 - Compressor Disks

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This Airworthiness Directive requires operators of Pratt & Whitney JT8D engines that have specific compressor disks (identified by part and serial number in FAA AD 98‑21‑24) to inspect those disks using the FAA’s technical requirements. Inspections must be done at the next shop visit or within 3,000 cycles in service, or within 10 years, whichever is earlier. The directive places compliance responsibility on operators and maintenance organisations and responds to reports of arc burns that can lead to disk fracture and uncontained engine failure.

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AD/JT8D/36 - Compressor Disks

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 - JT8D Series

AD/JT8D/36 Compressor Disks 2/99

Applicability: Pratt and Whitney JT8D series engines that have a compressor disk installed identified by part and serial number in Table 1 of FAA AD 98-21-24.

Requirement: Inspect affected compressor disks in accordance with the technical requirements of FAA AD 98-21-24.

Note: GE Engine Services - Dallas, LP, Engineering Bulletin (EB) JT8D-025, dated 27 March 1998 also refers.

Compliance: At the next shop visit, or within 3000 cycles in service after the effective date of this Directive, or within 10 years after the effective date of this Directive, whichever occurs first.

This Airworthiness Directive becomes effective on 25 February 1999.

Background: This airworthiness directive is prompted by reports of improper fixturing during the electrolytic cleaning of certain compressor discs that can result in arc burns in disk tiebolt holes, pressure balance holes and shielding holes. Arc burns in these areas could lead to a disk fracture and uncontained engine failure.

Source text

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

1 AD/JT8D/36 - Compressor Disks