Commonwealth legislation

AD/APU/14 - TSCP700 First Stage LPC Disc

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legislative instrument

Plain English Summary

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This airworthiness directive requires operators of AlliedSignal TSCP700 APUs with stage‑one low pressure compressor disc P/No 3606429-1 to remove affected LPC1 discs and follow AlliedSignal Service Bulletin TSCP700-49-7266 (Requirement; Applicability). CASA set an effective compliance date of 26 February 1998 and enforces the removal (Compliance). Operators bear the cost of inspection, removal and replacement; the action follows reported LPC1 rim separations and a manufacturer-imposed reduction in LPC1 life limit (Background).

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Current sections

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AD/APU/14 - TSCP700 First Stage LPC Disc

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Auxiliary Power Units

AD/APU/14 TSCP700 First Stage LPC Disc 3/98

Applicability: AlliedSignal Inc. TSCP700 series auxiliary power units (APUs) incorporating stage one low pressure compressor (LPC1) disc, P/No 3606429-1.

Requirement: Remove from service affected TSCP700 LPC1 discs in accordance with AlliedSignal Service Bulletin TSCP700-49-7266.

Note: FAA AD 97-19-18 also refers

Compliance: As specified in the requirement document, with a revised effective date of 26 February 1998.

This airworthiness directive becomes effective 26 February 1998.

Background: The manufacturer has advised there has been LPC1 disc rim separation events.

Subsequent investigation has resulted in a reduction in the LPC1 life limit.

Source text

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