TM 55-1520-228-10
Change 11 i
TECHNICAL MANUAL HEADQUARTERS
NO. 55-1520-228-10 DEPARTMENT OF THE ARMY
WASHINGTON, D.C., 17 JANUARY 1989
OPERATORS MANUAL
FOR
ARMY MODEL OH-58A/C HELICOPTER
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
You can improve this manual. If you find any mistakes or if you know of a way to improve these
procedures, please let us know. Mail your letter, or DA Form 2028 (Recommended Changes to
Publications and Blank Forms), located in the back of this manual, directly to: Commander, U.S. Army
Aviation and Missile Command, ATTN: AMSAM-MMC-MA-NP, Redstone Arsenal, AL 35898-5000.
A reply will be furnished to you. You may also provide DA Form 2028 information to AMCOM via e-mail,
fax, or the World Wide Web. Our fax number is: DSN 788-6546 or Commercial 256-842-6546. Our
e-mail address is: 2028@redstone.army.mil. Instructions for sending an electronic 2028 may be found
at the back of this manual immediately preceding the hard copy 2028. For the World Wide Web use:
https://amcom2028.redstone.army.mil.
TABLE OF CONTENTS
Chapter/Section Page
CHAPTER 1 INTRODUCTION 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHAPTER 2 HELICOPTER AND SYSTEMS DESCRIPTION AND OPERATION
Section I Helicopter 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
II Emergency Equipment 2-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
III Engines and Related Systems 2-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IV Fuel System 2-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V Flight Controls 2-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VI Hydraulic System 2-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VII Power Train System 2-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VIII Main and Tail Rotor Groups 2-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IX Utility System 2-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
X Heating and Ventilation 2-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
XI Electrical Power Supply and Distribution System 2-40. . . . . . . . . . . . . . . . . . . . . . . . . . . .
XII Lighting 2-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
XIII Flight Instruments 2-45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
XIV Servicing, Parking, and Mooring 2-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHAPTER 3 AVIONICS
Section I Communications 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
II Navigation 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
III Transponder and Radar 3-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IV Sincgars AN/ARC-201 Radio Set 3-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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