Document ID: chunk:federal_register_of_legislation:F2006B06306:body:0
Version: federal_register_of_legislation:F2006B06306
Segment Type: other
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Character Range: 0–1199

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

 Porsche Piston Engines

AD/PORSCHE/3 Valve Springs 13/98 TX

 Applicability: Porsche PFM 3200 N01 and N03 engines.

 Requirement: To address a report of a broken valve spring resulting in a complete engine failure:

              A: By reviewing engine records, determine the operating hours of the cylinder heads, and

              B: in accordance with the instructions detailed in Porsche PFM 3200 Service Bulletin Number N/105-036, replace engine valve springs installed in cylinder heads which have a time in service greater than 500 hours .

            Note: German LBA Airworthiness Directive AD 1998-436 refers.

 Compliance: Unless previously accomplished; before further flight.

            This Airworthiness Directive becomes effective on 19 October 1998.

            Background:  This directive has been issued to require the replacement of cylinder head valve springs which have been in service for greater than 500 hours. The requirement reflects a report of an engine failure in flight which resulted from a broken valve spring.