1977–1986 Cessna 172 N Skyhawk Factory Service Manual (P/N D2065-3-13)

• Service-manual coverage: 1977–1986 Cessna 172N/172P Skyhawk and Skyhawk II, Reims/Cessna F172N/F172P, and 1983–1984 172Q Cutlass/Cutlass II, with year-by-year serial applicability and landplane/floatplane distinctions where provided.
• Two Cessna publications: the 652-page Service Manual D2065-3-13, Revision 3, and the 662-page Illustrated Parts Catalog P696-12. The catalog extends parts identification to 1975–1986, including 172M/F172M and 1985 172Q applications.
• Covers wing and empennage removal, windshield and window repair, door-latch and seat-rail inspection, plus aileron, flap, elevator, trim, and rudder troubleshooting, component replacement, rigging, travel checks, and control-surface balancing.
• Details McCauley and Cleveland wheel configurations, axles, nose-strut and shimmy-damper repair, steering adjustment, brake and master-cylinder service, system bleeding, and serial-specific landing-gear procedures.
• Covers Lycoming O-320-H2AD, O-320-D2J, and O-360-A4N installations, including engine removal and installation, magneto timing, carburetor and control rigging, oil, induction, starting, exhaust, and standard, long-range, or integral wet-wing fuel systems.
• Includes pitot/static tests, vacuum and standby-vacuum diagnosis, fuel-quantity calibration, model-year electrical-system variants, alternator troubleshooting, ELT and lighting service, circuit-specific wiring diagrams, and serial-coded exploded parts views.

Manual Content and Overview

This digital PDF package pairs two Cessna factory publications. D2065-3-13 is the 20 March 1985 basic service manual incorporating Revision 2 dated 1 May 1992 and Revision 3 dated 1 July 1995. Temporary Revision 4 updates engine-mount-to-fuselage bolt torque data, while Temporary Revision 5 adds criteria for cracks at the trailing edges of corrugated control surfaces. P696-12, dated 1 August 1996, supplies illustrated parts breakdowns, usable-on codes, and serial-specific part listings.

The coverage is broader and more precise than a blanket “Cessna 172N” label. Service procedures cover the 172N through 1980, the 172P from 1981 through 1986, French-built F172N/F172P aircraft, and the 172Q for 1983–1984. The parts catalog reaches back to 1975–1976 172M/F172M aircraft and carries 172Q parts coverage through 1985. Year-by-year serial tables and usable-on codes separate assemblies that changed during production. Floatplane-related content includes dedicated parts figures for fittings, the rudder-aileron interconnect, and fuselage structure.

Ground-handling and inspection material covers towing, hoisting, jacking, leveling, weighing, tie-down, storage, return-to-service checks, cleaning, lubrication, cold-weather fuel-additive data, and Cessna inspection charts. The inspection section addresses pre-inspection operational checks, 50-, 100-, and 200-hour items, annual requirements, component time limits, and Progressive Care references.

Airframe chapters cover acrylic windshield and window repair, cabin and baggage doors, early and late latch arrangements, seats, upholstery, shoulder harnesses, cargo tie-downs, and seat-rail inspection. Wing, strut, fin, and stabilizer work is followed by separate troubleshooting and rigging sections for the aileron, electric flap, elevator, elevator-trim, rudder, and rudder-trim systems. Representative figures include Aileron Control System, Wing Flap Control System, Trim Tab Free-Play Inspection, Main Landing Gear Installation, Integral Fuel Bay Installation, and Control Surface Balancing.

Landing-gear coverage distinguishes McCauley and Cleveland wheel assemblies and documents main gear, axles, the nose-gear shock strut, torque links, shimmy damper, steering, brakes, and parking brake. The brake master cylinder changes at serials 17271035 and F17201750; the later design has its own disassembly and seal arrangement and calls out wrench No. 34-101. Fuel chapters separate removable standard and long-range tanks from the integral fuel-bay installation introduced at serials 17274010, F17202070, and 17275869 for the 172Q. Fuel-bay purging, leak classification, sealing after structural repair, curing, and testing are included.

The engine chapters provide airframe-side service for the three covered Lycoming installations: cowling, mounts, baffles, hoses, carburetor, ignition, magnetos, controls, starting, exhaust, oil cooling, engine removal, build-up, installation, and run-up checks. Electrical and instrument sections add pitot/static leakage tests, vacuum fault isolation, standby-vacuum service, fuel-quantity transmitter calibration, alternator and regulator diagnosis, lighting, and ELT configurations. The manual separates the 14-volt system used through 1977 from the 28-volt configuration introduced for 1978, with wiring sheets for battery, bus, magneto, engine instruments, wing flaps, pitot heat, air conditioning, vacuum warning, and standby vacuum systems.

Technical Data and Specifications

Reference data is tied to the applicable job: component torque tables, cable tensions, control travels, wheel-alignment checks, tire and strut servicing, fluid capacities, lubrication materials, inspection limits, electrical test data, and calibration information. Structural repair coverage includes repair-versus-replacement criteria for wing skins, stringers, ribs, spars, leading edges, fuselage structure, landing-gear bulkheads, firewall areas, engine mounts, fiberglass parts, and corrugated control surfaces. The parts catalog supports repair planning with exploded views keyed to part numbers, quantities, attaching hardware, and usable-on codes.

Several manual-specific details help prevent configuration and repair errors. The propeller spacer and propeller are a matched, balanced set, so their indexed relationship must be preserved. The fuselage must not be supported from its underside during structural work because the skin and bulkheads are not designed for that load. Temporary Revision 5 also treats stop-drilling as a limited crack disposition; a corrugated control-surface crack that continues beyond the stop hole requires repair rather than repeated stop-drilling.

Scope matters. D2065-3-13 covers installed-engine and airframe-system service, but directs internal engine, accessory, and propeller overhaul to the applicable manufacturer publications. Instrument troubleshooting continues to the defective instrument; internal instrument repair is outside this manual. STC installations require the maintenance data issued for the modification, and P696-12 is a parts-identification catalog rather than a replacement for repair procedures.

Maintenance involving fuel, brake hydraulics, jacking, electrical power, or propeller movement must follow the exact model- and serial-applicable procedure and be performed by appropriately qualified personnel.