71-25-07 PRATT & WHITNEY AIRCRAFT: Amdt. 39-1354. Applies to all JT8D-1, JT8D-1A, JT8D-7, JT8D-7A, JT8D-9, JT8D-11 turbofan engines which incorporate the following part numbers: 480735, 493332, 501725 and 523476 fuel nozzle support assemblies.
To prevent failure of the fuel nozzle support assemblies from fatigue cracking in the base fillet accomplish the following:
Within the next 6000 hours' time in service after the effective date of this AD unless already accomplished alter all fuel nozzle support assembly part numbers 480735, 493332, 501725 or 523476 in accordance with P&WA Service Bulletin No. 3536 or equivalent method approved by the Chief, Engineering & Manufacturing Branch, FAA, Eastern Region, or replace with superseding part number fuel nozzle support assembly.
Upon submission of substantiating data through an FAA Maintenance Inspector by an owner or operator, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region may adjust the compliance time.
This amendment is effective December 14, 1971.