1960-1981 Piper PA-23-235 Apache & PA-23-250 Aztec Service Manual

1960–1981 Piper PA-23 Series Service and Maintenance Manual (Apache & Aztec)

• Covers 1960–1981 Piper PA-23-235 Apache and PA-23-250 Aztec variants, including 14-volt, 28-volt, and six-place configurations.
• Official Piper Aircraft publication (P/N 753-564, reissued February 1981), containing all interim updates for the production run, including specialized turbocharger and oxygen systems.
• 1,309 pages featuring 52 exploded-view diagrams, 35 fuel and hydraulic schematics, and 23 comprehensive torque and service-limit tables.
• Fully indexed, searchable PDF available for instant download to your account.
• Lifetime access ensures you can easily retrieve your files after a hard-drive failure or device change.

Documented Aircraft Systems

This comprehensive service manual details the inspection, handling, and maintenance requirements for the PA-23 series twin-engine monoplane. It outlines critical procedures for verifying structural integrity, landing gear hydraulic operation, fuel system management, and cabin environmental controls.

Mechanics and technicians will find in-depth power plant servicing data, including diagnostics for both carburetor and fuel injection setups. The electrical section thoroughly covers generator and alternator configurations across the entire Apache and Aztec airframe life cycle.

Specifications and Reference Data

For precise bench work and line maintenance, the manual provides essential tolerances and specifications. This includes engine oil sump capacities (12 U.S. quarts), multi-stage bolt torque values, and landing gear service limits, such as tire pressures for 4-ply and 6-ply configurations ranging from 27 to 46 psi.

Additional reference materials cover conversion tables, consumable material manufacturer listings, exact cable tension settings, and specific oxygen bottle pressures relative to ambient temperature. Reviewing what an OEM service publication covers in this extensive document is an essential step for maintaining ongoing airworthiness.

Because aviation safety is critical, this documentation is provided for reference purposes. Always consult certified A&P mechanics and verify against the latest FAA-mandated service bulletins before performing active maintenance on this aircraft.