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

1960–1981 Piper PA-23 Series Service and Maintenance Overview

• 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 18, 1981
• Contains 52 exploded-view diagrams, 35 fuel system/hydraulic schematics, and 23 comprehensive torque and service-limit tables
• Downloads to your account within seconds of checkout
• Indexed PDF search covers every chapter and appendix
• Stored against your account so you can retrieve it after a hard-drive loss
• This 1981 reissued edition contains all interim updates for the 1960–1981 PA-23 production run, including specialized turbocharger and oxygen system documentation

Documented Aircraft Systems

The 1960–1981 Piper PA-23-235 Apache and PA-23-250 Aztec service manual details the inspection, handling, and maintenance requirements for the PA-23 series twin-engine monoplane. This documentation defines technical procedures for structural integrity, landing gear hydraulic operation, fuel system management, and cabin environmental controls.

Sections within this publication address power plant servicing, including carburetor and fuel injection system diagnostics. The document also details the maintenance of electrical systems, covering both generator and alternator configurations for varying production serial ranges across the Apache and Aztec airframe life cycle.

Specification and Reference Data

This manual provides extensive technical data, including engine oil sump capacities of 12 U.S. quarts and multi-stage bolt torque values for airframe components. Landing gear service tolerances are documented for nose and main oleo struts, with specified tire pressures for 4-ply and 6-ply configurations ranging from 27 to 46 psi.

Additional reference materials include conversion tables, consumable material manufacturer listings, and detailed cable tension settings. System data includes specific oxygen bottle pressures relative to ambient temperature and fuel cell capacities. what an OEM service publication covers in this 1309-page document is critical for ongoing airworthiness.

Note: This publication is provided for reference only; always consult certified aviation maintenance technicians and the latest FAA-mandated service bulletins before performing any work on this aircraft. This official Piper Aircraft service manual provides complete maintenance, inspection, and handling data for the 1960–1981 Piper PA-23-235 Apache and PA-23-250 Aztec series, documenting systems from the power plant to the landing gear assembly.