HEADQUARTERS OH-58A User Manual

TM 55-1520-228-10
TECHNICAL MANUAL
OPERATOR’S MANUAL
ARMY MODEL OH-58A/C
HELICOPTER
This manual supersedes TM 55-1520-228-10 and TM 55-1520-
236-10, 7 April 1978, including all changes.
HEADQUARTERS, DEPARTMENT OF THE ARMY
17 JANUARY 1989

HEADQUARTERS OH-58A Specifications

General

Brand	HEADQUARTERS
Model	OH-58A
Category	Toy
Language	English

Summary

PRECAUTIONARY DATA

WARNING

Highlights essential operating or maintenance procedures that could result in injury or loss of life if not followed.

CAUTION

Highlights essential operating or maintenance procedures that could result in damage or destruction of equipment if not observed.

CHAPTER 1 INTRODUCTION

1-2. WARNINGS, CAUTIONS, AND NOTES DEFINED

Definitions of warning, caution, and note usage within the manual.

CHAPTER 2 HELICOPTER AND SYSTEMS DESCRIPTION AND OPERATIONS

SECTION I. HELICOPTER

Detailed description of the helicopter.

2-1. GENERAL

General description of the OH-58A/C helicopter's design and components.

SECTION III. ENGINES AND RELATED SYSTEMS

2-9. ENGINE

Description of the T63-A-720 turbine engine and its major components.

SECTION VII. POWER TRAIN SYSTEM

2-35. TRANSMISSION

SECTION VIII. MAIN AND TAIL ROTOR GROUPS

2-42. MAIN ROTOR

SECTION XI. ELECTRICAL POWER SUPPLY AND DISTRIBUTION SYSTEM

2-49. DIRECT CURRENT PRIMARY POWER

Description of the DC power system.

SECTION XIII. FLIGHT INSTRUMENTS

2-62. AAU-31/A PNEUMATIC ALTIMETER

CHAPTER 3 AVIONICS

SECTION I. COMMUNICATIONS

3-6. COMMUNICATIONS SYSTEM CONTROL, C-6533/ARC

Description of the communications system control unit.

3-10. VHF/FM RADIO SET

Description of the VHF/FM radio set.

3-14. VHF/AM RADIO SET (AN/ARC-115)

3-18. UHF/AM RADIO SET (AN/ARC-116 or AN/ARC-164)

Description of the UHF/AM radio set.

SECTION III. TRANSPONDER AND RADAR

3-55. A TRANSPONDER SET – AN/APX-72

Description of the transponder set.

3-59. C TRANSPONDER SET – AN/APX-100

3-68. RADAR SIGNAL DETECTING SET (AN/APR-39A(V)1)

SECTION IV. AN/ARC-201 SINCGARS RADIO SET

3-71. VHF/FM RADIO SET AN/ARC-201

CHAPTER 5 OPERATING LIMITS AND RESTRICTIONS

SECTION II. SYSTEMS LIMITS

Limits related to aircraft systems.

5-5. INSTRUMENT MARKINGS

Description of instrument markings and their meanings.

SECTION III. POWER LIMITS

5-11. ENGINE LIMITATIONS

Operational limits for the aircraft engine.

5-12. FUEL OPERATION LIMITS

Operational limits for different fuel types.

SECTION IV. LOAD LIMITS

5-17. CENTER OF GRAVITY LIMITATIONS

5-18. WEIGHT LIMITATIONS

SECTION V. AIRSPEED LIMITS

5-19. AIRSPEED LIMITS

SECTION VI. MANEUVERING

5-24. HOVERING LIMITATIONS

Limitations for hovering operations.

CHAPTER 6 WEIGHT/BALANCE AND LOADING

SECTION I. GENERAL

General information on weight, balance, and loading.

6-4. LOADING CHARTS

6-5. CENTER OF GRAVITY LIMIT CHART (Figure 6-2)

Chart for determining the approximate center of gravity.

CHAPTER 7 PERFORMANCE DATA

SECTION X. TORQUE AVAILABLE

7-37. DESCRIPTION

7-38. CHART DIFFERENCES

SECTION XI. HOVER

7-41. DESCRIPTION

7-42. USE OF CHART

SECTION XIII. CRUISE

7-47. DESCRIPTION

7-48. USE OF CHARTS

SECTION XV. CLIMB - DESCENT

7-53. DESCRIPTION - CLIMB - DESCENT CHART

7-54. USE OF CLIMB-DESCENT CHART

SECTION XVI. IDLE FUEL FLOW

7-59. DESCRIPTION

7-60. USE OF CHART

CHAPTER 8 NORMAL PROCEDURES

SECTION I. MISSION PLANNING

8-1. MISSION PLANNING

SECTION II. OPERATING PROCEDURES AND MANEUVERS

8-4. OPERATING PROCEDURES AND MANEUVERS

SECTION IV. FLIGHT CHARACTERISTICS

8-27. OPERATING CHARACTERISTICS

SECTION V. ADVERSE ENVIRONMENTAL CONDITIONS

8-34. COLD WEATHER OPERATIONS

CHAPTER 9 EMERGENCY PROCEDURES

SECTION I. AIRCRAFT SYSTEMS

Emergencies related to aircraft systems.

9-1. HELICOPTER SYSTEMS

Description of helicopter system emergencies.

9-2. IMMEDIATE ACTION EMERGENCY STEPS

Critical immediate actions for emergencies.

9-11. ENGINE FAILURE – LOWER ALTITUDE/LOW AIRSPEED OR CRUISE