AD/APU/14 - TSCP700 First Stage LPC Disc

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Auxiliary Power Units

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

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

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

FAA AD 97-19-18 also refers

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

This airworthiness directive becomes effective 26 February 1998.

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

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