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TM 55-1520-228-BD
FLIGHT CONTROLS
BDAR FIXES SHALL BE USED ONLY IN COMBAT OR FOR TRAINING
AT THE DISCRETION OF THE COMMANDER.
(AUTHORIZED TRAINING FIXES ARE LISTED IN APPENDIX E.)
IN EITHER CASE, DAMAGES SHALL BE REPAIRED BY STANDARD
PROCEDURES AS SOON AS PRACTICABLE.
Section I. INTRODUCTION
13-1. GENERAL.
and tail rotor controls to the aft
flight control components. Refer to
a. The flight control system is made
Figure 13-1 for a schematic of the
up of the main rotor collective controls,
system.
cyclic controls, and the tail rotor con-
trols. The tail rotor pedals are con-
13-2. ASSESSMENT PROCEDURES. Refer to
nected to the tail rotor assembly.
b.
This chapter contains some BDAR
13-3. REPAIR PROCEDURE INDEX.
procedures which may be used to
accomplish repairs to the flight control
tubes.
Flight control tubes connect the
copilot’s and pilot’s cyclic, collective,
Tubes,
Section II. TUBES, FLIGHT
13-4. SUBSYSTEMS AND ASSEMBLIES. There
are various subsystems and assemblies
within the flight control system that
are vital for combat aircraft maneuvera-
bility and control but are not neces-
sarily essential for basic flight capa-
bilities. Refer to Table 13-1 for
assessment procedures.
a. Force Trim System. If the force
trim system is malfunctioning, the
aircraft is still fully mission capable
with no limitations presented.
b.
Control Rods.
(1) Copilot to Pilot. If any
control rods, bell-cranks, or linkages
connecting the copilot controls to the
pilot controls break or otherwise become
inoperable, the pilot may assume full
control for the particular function
which has been damaged, provided that
the damaged part does not become jammed
in the surrounding aircraft structure.
Once the
PARA.
CONTROL
aircraft is on the ground, if
no replacement parts are available, the
control tube may be splice-repaired
(refer to paragraph 13-4) or removed to
avoid any possibility of the control
tube getting jammed. If the tube is
removed, the pilot assumes full control
of the function that has been lost to
the copilot.
(2) If any flight control systems,
including control rods, bell-cranks,
linkages, hydraulic cylinders, etc.,
which lie between the pilot and the main
rotor blade or tail rotor blade sustain
damage during flight, the aircraft will
be uncontrollable and forced to crash
land.
GENERAL INFORMATION: The following
repair procedures may be used to
accomplish repairs to flight control
tubes.
Flight control tubes connect the
Summary of Contents for OH-58 C
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Page 36: ...TM 55 1520 228 BD ASSESSING BATTLEFIELD DAMAGE Table 2 2 General Assessment Cont 2 4...
Page 37: ...TM 55 1520 228 BD ASSESSING BATTLEFIELD DAMAGE Table 2 2 General Assessment Cont 2 5...
Page 38: ...TM 55 1520 228 BD ASSESSING BATTLEFIELD DAMAGE Table 2 2 General Assessment Cont 2 6...
Page 39: ...Table 2 2 General Assessment Cont TM 55 1520 228 BD ASSESSING BATTLEFIELD DAMAGE 2 7...
Page 40: ...I 2 8 TM 55 1520 228 BD ASSESSING BATTLEFIED DAMAGE Table 2 2 General Assessment Cont...
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Page 46: ...TM 55 1520 228 BD AIRFRAME 4 2 Table 4 1 Aircraft Structure Damage Assessment Prodecures...
Page 47: ...TM 55 1520 228 BD AIRFRAME Figure 4 1 Aircraft Sections 4 3...
Page 50: ...TM 55 1520 228 BD AIRFRAME Figure 4 2 DA Form 2404 4 6...
Page 52: ...TM 55 1520 228 BD AIRFRAME Figure 4 3 Evaluating Damage to Angles Channels and Z Angles 4 8...
Page 53: ...TM 55 1520 228 BD AIRFRAME Figure 4 4 Damaged Cross Section 4 9...
Page 55: ...TM 55 1520 228 BD AIRFRAME Figure 4 6 Measuring Damage in Webs and Panels 4 11...
Page 57: ...TM 55 1520 228 BD AIRFRAME Figure 4 7 Measuring Damage in Honeycomb Sandwich Panels 4 13...
Page 61: ...TM 55 1520 228 BD AIRFRAME Figure 4 8 OH 58 Helicopter 4 17...
Page 63: ...TM 55 1520 228 BD AIRFRAME Figure 4 10 Cockpit 4 19...
Page 64: ...TM 55 1520 228 BD AIRFRAME Figure 4 11 Fuselage Pylon Support Structure Sheet 1 of 5 4 20...
Page 65: ...TM 55 1520 228 BD AIRFRAME Figure 4 11 Fuselage Pylon Support Structure Sheet 2 of 5 4 21...
Page 66: ...TM 55 1520 228 BD AIRFRAME Figure 4 11 Fuselage Pylon Support Structure Sheet 3 of 5 4 22...
Page 68: ...TM 55 1520 228 BD AIRFRAME Figure 4 11 Fuselage Pylon Support Structure Sheet 5 of 5 4 24...
Page 69: ...TM 55 1520 228 BD AIRFRAME Figure 4 12 Upper and Lower Shell Structure 4 25...
Page 70: ...TM 55 1520 228 BD AIRFRAME Figure 4 13 Aft Fuselage Structure 4 26...
Page 71: ...TM 55 1520 228 BD AIRFRAME Figure 4 14 Tail Boom 4 27...
Page 72: ...TM 55 1520 228 BD AIRFRAME Figure 4 15 Cowling and Firewalls 4 28...
Page 94: ...4 50 Table 4 8 Metal Substitution Chart TM 55 1520 228 BD AIRFRAME...
Page 96: ...TM 55 1520 228 BD AIRFRAME Figure 4 16 Typical Former Repair Sheet 1 of 2 4 52...
Page 97: ...TM 55 1520 228 BD AIRFRAME Figure 4 16 Typical Former Repair Sheet 2 of 2 4 53...
Page 100: ...TM 55 1520 228 BD AIRFRAME Figure 4 19 Typical Patch Plate Repair 4 56...
Page 102: ...TM 55 1520 228 BD AIRFRAME Figure 4 20 Expedient Cap Longeron Repair 4 58...
Page 104: ...TM 55 1520 228 BD AIRFRAME Figure 4 21 Repair of Damaged Bulkhead Flange 4 60...
Page 105: ...TM 55 1520 228 BD AIRFRAME Figure 4 22 Typical Combination Repair Sheet 1 of 2 4 61...
Page 106: ...TM 55 1520 228 BD AIRFRAME Figure 4 22 Typical Combination Repair Sheet 2 of 2 4 62...
Page 113: ...TM 55 1520 228 BD AIRFRAME Figure 4 29 Fracture Lacing With Safety Wire 4 69...
Page 117: ...TM 55 1520 228 BD ALIGHTING GEAR Table 5 1 Assessment Procedure Logic 5 3...
Page 119: ...TM 55 1520 228 BD ALIGHTING GEAR Figure 5 3 Skid Repair Figure 5 4 Clamp Repair 5 5...
Page 120: ...TM 55 1520 228 BD ALIGHTING GEAR Figure 5 5 Fabricated Clamp 5 6...
Page 122: ...TM 55 1520 228 BD POWER PLANT Figure 6 1 T63 Series Engine 6 2...
Page 123: ...POWER PLANT Table 6 1 Engine BDAR Assessment Logic 6 3...
Page 127: ...TM 55 1520 228 BD POWER PLANT Figure 6 3 Double Check Valve System Possible Alternatives 6 7...
Page 136: ...TM 55 1520 228 BD ROTORS Table 7 1 Assessment Procedures 7 4...
Page 137: ...TM 55 1520 228 BD ROTORS Figure 7 3 Rotor Blades Damage Sensitive Areas 7 5...
Page 139: ...TM 55 1520 228 BD ROTORS Figure 7 4 Rotor Blade Repair Application of Tape 7 7...
Page 143: ...TM 55 1520 228 BD DRIVE TRAIN SYSTEM 8 3 Figure 8 1 Drive Train System Sheet 2 of 4...
Page 144: ...TM 55 1520 228 BD DRIVE TRAIN SYSTEM Figure 8 1 Drive Train System Sheet 3 of 4 8 4...
Page 145: ...TM 55 1520 228 BD DRIVE TRAIN SYSTEM Figure 8 1 Drive Train System Sheet 4 of 4 8 5...
Page 149: ...TM 55 1520 228 BD DRIVE TRAIN SYSTEM Figure 8 3 Flex Duct Repair Sheet 1 of 2 8 9...
Page 150: ...TM 55 1520 228 BD DRIVE TRAIN SYSTEM Figure 8 3 Flex Duct Repair Sheet 2 of 2 8 10...
Page 156: ...TM 55 1520 228 BD HYDRAULIC Table 9 1 Assessment Logic Figure 9 3 Two Part Fitting 9 4...
Page 157: ...TM 55 1520 228 BD HYDRAULIC Figure 9 4 Four Part Fitting Figure 9 5 Using Tube Cutter 9 5...
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Page 180: ...TM 55 1520 228 BD ELECTRICAL AND AVIONICS SYSTEM Figure 11 2 Crimp Splice 11 8...
Page 192: ...TM 55 1520 228 BD ELECTRICAL AND AVIONICS SYSTEM Figure 11 15 Shielded Cable Repair 11 20...
Page 208: ...TM 55 1520 228 BD ELECTRICAL AND AVIONICS SYSTEM Figure 11 35 Circuit Breakers 11 36...
Page 219: ...TM 55 1520 228 BD ELECTRICAL AND AVIONICS SYSTEM Figure 11 45 Preparation of Coax 11 47...
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Page 225: ...TM 55 1520 228 BD FUEL SYSTEMS Table 12 1 Fuel System Assessment Procedures 12 3...
Page 227: ...TM 55 1520 228 BD FUEL SYSTEMS Figure 12 2 Emergency Mechanical Clamp Repair 12 5...
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Page 234: ...Figure 13 1 OH 58 Flight Controls Schematic 13 2 TM 55 1520 228 BD FLIGHT CONTROLS SYSTEM...
Page 237: ...TM 55 1520 228 BD FLIGHT CONTROLS SYSTEM Figure 13 2 Collective Flight Control 13 5...
Page 238: ...TM 55 1520 228 BD FLIGHT CONTROLS SYSTEM Figure 13 3 Cyclic Flight Control 13 6...
Page 239: ...TM 55 1520 228 BD FLIGHT CONTROLS SYSTEM Figure 13 4 Flight Control Actuators 13 7...
Page 248: ...TM 55 1520 228 BD UTILITY SYSTEMS Figure 14 1 Engine De Ice System 14 2...
Page 255: ...TM 55 1520 228 BD ENVIRONMENTAL CONTROL SYSTEM Table 15 1 Assessment Procedures 15 7...
Page 258: ...TM 55 1520 228 BD ENVIRONMENTAL CONTROL SYSTEM Figure 15 6 Bleed Air Line Installation 15 10...
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Page 288: ...TM 55 1520 228 BD APPENDIX F Figure F 1 Intercom System Sheet 1 of 2 F 2...
Page 298: ...TM 55 1520 228 BD APPENDIX F Figure F 6 Direction Finder Set AN ARN 89 Sheet 1 of 2 F 12...
Page 300: ...TM 55 1520 228 BD APPENDIX F Figure F 7 Radio Receiving Set AN ARN 123 V 1 Sheet 1 of 2 F 14...
Page 302: ...TM 55 1520 228 BD APPENDIX F Figure F 8 Radar Altimeter System AN APN 209 Sheet 1 of 2 F 16...
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Page 332: ...P I N 0 6 6 6 3 5 0 0 0...