Dec 1981 Flight Readiness Verification Plan for Shuttle Auxiliary Power Unit (APU), 20pp. — A collection of testing and verification documents in support of the Shuttle APU system.  

This example comes from the collection of Stan Barauskas, CSM Propulsion Test and Checkout engineer for Apollo, ASTP, and Skylab.  Barauskas later went on to work on Shuttle, focusing his efforts on the APU system.  

Condition is fine.

A great vintage Shuttle document straight from the engineer who worked on the APU sustem!