This manual covers the Pratt & Whitney APU PW901A and PW901C models, with part numbers including 3910001-01, 3910001-02, 3910001-03, and 3902712-01. These Auxiliary Power Units are designed for reliable operation and have been current as of 2009. Their robust engineering ensures consistent performance in demanding aviation environments.

The purpose of this document is to provide comprehensive guidance for the maintenance and servicing of the PW901A and PW901C APUs. It includes detailed procedures, technical specifications, and essential information to support owners, technicians, and maintenance personnel in ensuring the optimal functionality and longevity of these units. Adherence to the information within this manual is crucial for safe and effective operation.