Service bulletin · Pratt & Whitney

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OpenAirDocs holds no copy of this documentFAA or NTSB records cite it, as the list below shows. Service documents are published by their manufacturer, often to owners and operators only: ask Pratt & Whitney, a dealer or a repair station for the revision you need.
Manufacturer
Pratt & Whitney
Type
Service Bulletin
Number
72-450
Latest revision known
72-450, Revision 5, dated May 28, 1994

A newer revision may exist than any OpenAirDocs knows of: check with the manufacturer.

Also cited in 1 proposed AD.