Bell UH-1B/1C/1H/1M/EH-1H/UH-1V Utility-Tactical Transport Helicopter Aviation Unit & Intermediate Maintenance Repair Parts & Special Tools Lists- 3 Vols.
TM 55-1520-210-23P-1, February 27, 1981
NSN 1520-00-713-9912 (UH-1B)
NSN 1520-00-997-8862 (UH-1C)
NSN 1520-00-087-7637 (UH-1H)
NSN 1520-00-809-2631 (UH-1M)
NSN 1520-00-368-8442 (EH-1H)
NSN 1520-01-043-4949 (UH-1V)
Table of Contents:
Section 1: Introduction
Section 2: Repair Parts List
Functional Group 02 Airframe
 Functional Group 03 Alighting Gear
Functional Group 04 Powerplant Installation
Functional Group 05 Rotors 
Functional Group 06 Drive Train
Functional Group 07 Hydraulic & Pneumatic System
Functional Group 08 Instrument System
Functional Group 09 Electrical System
Functional Group 10: Fuel System
Functional Group 11: Flight Control Systems
Functional Group 12 Utility Systems
Functional Group 13 Environmental Control System
Functional Group 14: Hoist & Winches
Functional Group 16: Mission Equipment
Functional Group 17: Emergency Equipment
Functional Group 50 Repair Kits 
Functional Group 60 Bulk Materials 
Section III: Functional Group 80 Special Tools, Test & Support Equipment
Section IV: National Stock Number & Part Number Index
Manual is an original.