T63-A-5A / T63-A-700 Turboshaft Engine Aviation Unit and Intermediate Maintenance Manual (TM 55-2840-231-23)

Description

T63-A-5A / T63-A-700 Turboshaft Engine Maintenance Manual (TM 55-2840-231-23)

This T63-A-5A / T63-A-700 Turboshaft Engine Aviation Unit and Intermediate Maintenance Manual is the complete 564-page technical manual (TM 55-2840-231-23) covering the Allison T63 series engine assembly fitted to the OH-6A (Hughes) and OH-58A observation helicopters. Originally dated 27 February 1981 and reproduced here as the reprint incorporating Change 1 through Change 13, this maintenance manual takes a technician from general engine data through every major section, system and troubleshooting procedure needed to service the T63-A-5A (NSN 2840-00-923-6023) and T63-A-700 (NSN 2840-00-179-5536).

File Details

• Manual type: Aviation Unit and Aviation Intermediate Maintenance Manual (Technical Manual)
• Document number: TM 55-2840-231-23
• Models covered: T63-A-5A (NSN 2840-00-923-6023) and T63-A-700 (NSN 2840-00-179-5536)
• Original date: 27 February 1981, reprint with Change 1 through Change 13
• Language: English
• Page count: 564 pages
• File format: PDF, instant download

Chapters Covered

• Chapter 1 – Engine, General
  • Section I: General Information
  • Section II: Equipment Description and Data
  • Section III: Repair Parts, Special Tools, Measurement/TMDE and Support Equipment
  • Section IV: Service Upon Receipt
  • Section V: Preventive Maintenance Inspections
  • Section VI: Troubleshooting
  • Section VII: General Maintenance Procedures
  • Section VIII: Engine Testing in Mobile or Fixed Facilities
• Chapter 2 – Compressor Section
• Chapter 3 – Combustion Section
• Chapter 4 – Power Turbine
• Chapter 5 – Accessory Gearbox
• Chapter 6 – Fuel System
• Chapter 7 – Electrical System
• Chapter 8 – Oil System
• Chapter 9 – Miscellaneous Equipment/Air System
• Appendix A – References
• Appendix B – Maintenance Allocation Chart
• Appendix C – Special Tools and Test Equipment
• Appendix D – Expendable Supplies and Materials List
• Appendix G – Torque Values and Dimensional Limits, Overhaul and Retirement Schedule
• Appendix H – General Maintenance Practices
• Glossary and Index

Together these chapters walk a technician through the full engine assembly as installed on the OH-6A and OH-58A airframes: the compressor, combustion, power turbine and accessory gearbox sections, plus the fuel, electrical and oil systems that keep the T63 running, with troubleshooting and testing procedures tying it all together.

Technical Data Included

The T63-A-5A / T63-A-700 engine maintenance manual documents the leading particulars technicians actually reference in the shop: engine dimensions of 40.4 inches length, 22.5 inches height and 19.0 inches width, a dry weight of 138.5 pounds for the T63-A-700, maximum oil consumption of 0.05 gal/hr, and approved lubricating oil specifications MIL-L-23699 or MIL-L-7808. Fuel specifications are listed for primary (MIL-T-5624 JP-4), alternate (MIL-T-5624 JP-5/JP-8/JET-A/JETA-1) and emergency (MIL-G-5572) fuels. Design power output is rated at 317 shp with a 335 shp ram power rating, and gas producer (N1), power turbine (N2) and power output shaft design speeds are all tabulated. A full performance ratings table covers takeoff, normal, 90% normal, 75% normal, start and idle, and flight autorotation conditions with shaft horsepower, net jet thrust, gas producer speed, output shaft rpm, specific fuel consumption, ram power rating torque and measured gas temperature limits for each.

Illustrations and Schematics

The manual is heavily illustrated with fold-out and full-page figures, including the T63-A-700 turboshaft engine overview, engine fuel and control system, fuel control system schematic, compressor assembly, power turbine section, combustion section, power and accessory gearbox, fuel pump and filter assembly, a two-sheet engine lubrication schematic, oil pump schematic, fuel nozzle, ignition system, anti-icing system, compressor bleed control valve and operation diagrams, shipping container stenciling and labeling, universal fittings, pressure oil tube and filtering screen, bleed valve operation, and idle/flight autorotation GFTOT limits — giving a technician a genuine visual reference alongside every written procedure.

Why Technicians Rely on This T63-A-5A / T63-A-700 Manual

This T63-A-5A / T63-A-700 Turboshaft Engine Maintenance Manual gives a technician the correct Army-published procedures for inspecting, troubleshooting, servicing and testing the T63 engine assembly rather than relying on guesswork. Because the manual documents official leading particulars, performance ratings, torque values, dimensional limits and a symptom index, following it helps avoid the costly mistakes that come from using outdated or incorrect specifications on a turboshaft engine. As an instant PDF download, this T63-A-5A / T63-A-700 manual is delivered immediately after purchase — no shipping, no waiting. It can be viewed on a phone, tablet, laptop or shop computer, and printed in whole or in relevant sections whenever a hard copy is more convenient at the workbench.