AC 43.13-1B

Change 1, editorial update

Advisory circular · Acceptable Methods, Techniques, and Practices—Aircraft Inspection and Repair

Approved
September 27, 2001
Last reviewed
May 10, 2024
This change
Editorial Update to AC 43.13-1B CHG 1.
Family
AC 43.13-1 · 7 versions
Revision
B, change 1
14 CFR parts
43, 65, 23, 105, 25, 91
Cited by
95 ADs

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 21, 2025.

Show pages 1–12
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SECTION 12. PLATED PARTS6-45

6-193. CHROMIUM AND NICKEL-PLATED PARTS6-45

6-194. CADMIUM AND ZINC-PLATED PARTS6-45

6-195.–6-205. [RESERVED.]6-45

SECTION 13. CORROSION PROOFING OF LAND PLANES CONVERTED TO

SEAPLANES6-46

6-206. GENERAL6-46

6-207. NECESSARY MINIMUM PRECAUTIONS6-46

6-208. RECOMMENDED PRECAUTIONS6-46

6-209.–6-219. [RESERVED.]6-47

SECTION 14. HANDLING AND CARE OF AIRCRAFT RECOVERED FROM WATER

IMMERSION6-48

6-220. GENERAL6-48

6-221. INITIAL FRESHWATER OR DETERGENT WASH6-48

6-222. RECIPROCATING ENGINES AND PROPELLERS6-48

6-223. AIRFRAME6-49

6-224.–6-234. [RESERVED.]6-49

CHAPTER 7. AIRCRAFT HARDWARE, CONTROL CABLES, AND TURNBUCKLES7-1

SECTION 1. RIVETS7-1

7-1. GENERAL7-1

7-2. MATERIAL APPLICATIONS7-1

7-3.–7-13. [RESERVED.]7-2

SECTION 2. SCREWS7-3

7-14. GENERAL7-3

7-15. STRUCTURAL SCREWS7-3

7-16. MACHINE SCREWS7-3

7-17. PAN HEAD SCREWS (NAS600 THROUGH NAS606, NAS610 THROUGH

NAS616, NAS623, AND NAS1402 THROUGH NAS1406)7-3

7-18. SELF-TAPPING SCREWS7-4

7-19. WOOD SCREWS7-4

7-20.–7-33. [RESERVED.]7-4

SECTION 3. BOLTS7-5

7-34. GENERAL7-5

7-35. BOLTS7-5

7-36. IDENTIFICATION7-5

7-37. GRIP LENGTH7-6

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7-38. LOCKING OR SAFETYING OF BOLTS7-6

7-39. BOLT FIT7-6

7-40. TORQUES7-7

7-41. STANDARD AIRCRAFT HEX HEAD BOLTS (AN3 THROUGH AN20)7-10

7-42. DRILLED HEAD BOLTS (AN73 THROUGH AN81)7-10

7-43. ENGINE BOLTS7-10

7-44. CLOSE-TOLERANCE BOLTS7-10

7-45. INTERNAL WRENCHING BOLTS

(NAS144 THROUGH NAS158 AND NAS172 THROUGH NAS176)7-10

7-46. INTERNAL WRENCHING BOLTS (MS20004 THROUGH MS20024) AND SIX HOLE, DRILLED SOCKET HEAD BOLTS (AN148551 THROUGH

AN149350)7-11

7-47. TWELVE-POINT, EXTERNAL WRENCHING BOLTS

(NAS624 THROUGH NAS644)7-11

7-48. CLOSE-TOLERANCE SHEAR BOLTS (NAS464)7-11

7-49. NAS6200 SERIES BOLTS7-11

7-50. CLEVIS BOLTS (AN21 THROUGH AN36)7-11

7-51. EYEBOLTS (AN42 THROUGH AN49)7-11

7-52.–7-62. [RESERVED.]7-11

SECTION 4. NUTS7-12

7-63. GENERAL7-12

7-64. SELF-LOCKING NUTS7-12

7-65. NUT IDENTIFICATION FINISHES7-13

7-66. CASTLE NUT (AN310)7-14

7-67. CASTELLATED SHEAR NUT (AN320)7-14

7-68. PLAIN NUT (AN315 AND AN335)7-14

7-69. LIGHT HEX NUTS (AN340 AND AN345)7-14

7-70. CHECKNUT (AN316)7-15

7-71. WINGNUTS (AN350)7-15

7-72. SHEET SPRING NUTS (AN365)7-15

7-73.–7-84. RESERVED7-15

SECTION 5. WASHERS7-16

7-85. GENERAL7-16

7-86. PLAIN WASHERS (AN960 AND AN970)7-16

7-87. LOCK WASHERS (AN935 AND AN936)7-16

7-88. BALL SOCKET AND SEAT WASHERS (AN950 AND AN955)7-16

7-89. TAPER PIN WASHERS (AN975)7-16

7-90.–7-100. [RESERVED.]7-16

SECTION 6. PINS7-17

7-101. TAPER PINS7-17

7-102. FLATHEAD PINS (AN392 THROUGH AN406)7-17

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7-103. COTTER PINS (AN380)7-17

7-104. SPRING PINS7-17

7-105. QUICK-RELEASE PINS7-17

7-106.–7-121. [RESERVED.]7-17

SECTION 7. SAFETYING7-18

7-122. GENERAL7-18

7-123. SAFETY WIRE7-18

7-124. SAFETY-WIRING PROCEDURES7-20

7-125. TWISTING WITH SPECIAL TOOLS7-21

7-126. SECURING OIL CAPS, DRAIN COCKS, AND VALVES7-21

7-127. SECURING WITH COTTER PINS7-25

7-128.–7-139. [RESERVED.]7-26

SECTION 8. INSPECTION AND REPAIR OF CONTROL CABLES AND

TURNBUCKLES7-27

7-140. GENERAL7-27

7-141. CABLE DEFINITIONS7-27

7-142. FLEXIBLE CABLES7-27

7-143. NYLON-COATED CABLES7-29

7-144. NONFLEXIBLE CABLES7-30

7-145. CABLE SPECIFICATIONS7-31

7-146. CABLE PROOF LOADS7-31

7-147. REPLACEMENT OF CABLES7-31

7-148. MECHANICALLY-FABRICATED CABLE ASSEMBLIES7-32

7-149. CABLE SYSTEM INSPECTION7-39

7-150. CORROSION AND RUST PREVENTION7-44

7-151. WIRE SPLICES7-45

7-152. CABLE MAINTENANCE7-45

7-153. CABLE TENSION ADJUSTMENT7-45

7-154.–7-164. [RESERVED.]7-46

SECTION 9. TURNBUCKLES7-47

7-165. GENERAL7-47

7-166. TURNBUCKLE INSTALLATION7-47

7-167. WITNESS HOLE7-48

7-168.–7-178. [RESERVED.]7-48

SECTION 10. SAFETY METHODS FOR TURNBUCKLES7-49

7-179. GENERAL7-49

7-180. DOUBLE-WRAP METHOD7-49

7-181. SINGLE-WRAP METHOD7-50

7-182. SAFETY WIRE SECURED TURNBUCKLES7-50

7-183. SPECIAL LOCKING DEVICES7-52

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7-184. ASSEMBLING AND SECURING CLIP-LOCKING TURNBUCKLES7-52

7-185.–7-195. [RESERVED.]7-53

SECTION 11. HARDWARE IDENTIFICATION TABLES7-54

7-196.–7-206. [RESERVED.]7-83

CHAPTER 8. ENGINES, FUEL, EXHAUST, AND PROPELLERS8-1

SECTION 1. ENGINES8-1

8-1. GENERAL8-1

8-2. SPECIAL INSPECTION8-1

8-3. CRANKSHAFT INSPECTION AND REPAIR REQUIREMENTS8-3

8-4. REPLACEMENT PARTS IN CERTIFICATED ENGINES8-4

8-5. OIL SYSTEM LINES INSPECTION8-4

8-6. OIL FILTER INSPECTION8-4

8-7. CYLINDER HOLD-DOWN NUTS AND CAP SCREWS8-4

8-8. REUSE OF SAFETYING DEVICES8-5

8-9. SELF-LOCKING NUTS FOR AIRCRAFT ENGINES AND ACCESSORIES8-5

8-10. METALLIZING8-5

8-11. PLATING8-5

8-12. CORROSION8-7

8-13. ENGINE RUN-IN8-7

8-14. COMPRESSION TESTING OF AIRCRAFT ENGINE CYLINDERS8-7

8-15. SPARK PLUGS8-10

8-16. OPERATIONAL PROBLEMS8-14

8-17. SPARK PLUG PRE-RECONDITIONING INSPECTION8-19

8-18. IGNITION HARNESSES INSPECTION8-19

8-19. MAGNETO INSPECTION8-20

8-20. MAGNETO-TO-ENGINE TIMING8-22

8-21.–8-29. [RESERVED.]8-22

SECTION 2. FUEL SYSTEMS8-23

8-30. GENERAL8-23

8-31. FUEL LINES AND FITTINGS8-23

8-32. FUEL TANKS AND CELLS8-24

8-33. FUEL TANK CAPS, VENTS, AND OVERFLOW LINES8-25

8-34. FUEL CROSS-FEED, FIREWALL SHUTOFF, AND TANK SELECTOR

VALVES8-25

8-35. FUEL PUMPS8-26

8-36. FUEL FILTERS, STRAINERS, AND DRAINS8-26

8-37. INDICATOR SYSTEMS8-26

8-38. FUEL SYSTEM PRECAUTIONS8-26

8-39.–8-44. [RESERVED.]8-27

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SECTION 3. EXHAUST SYSTEMS8-28

8-45. GENERAL8-28

8-46. MUFFLER/HEAT EXCHANGER FAILURES8-28

8-47. MANIFOLD/STACK FAILURES8-30

8-48. INTERNAL MUFFLER FAILURES8-31

8-49. INSPECTION8-33

8-50. REPAIRS8-35

8-51. TURBOSUPERCHARGER8-36

8-52. AUGMENTER SYSTEMS8-36

8-53.–8-70. [RESERVED.]8-36

SECTION 4. REPAIR OF METAL PROPELLERS8-37

8-71. GENERAL8-37

8-72. STEEL BLADES8-37

8-73. ALUMINUM PROPELLER REPAIRS8-37

8-74. REPAIR LIMITS8-40

8-75. STEEL HUBS AND HUB PARTS8-42

8-76. PROPELLER HUB AND FLANGE REPAIR8-42

8-77. CONTROL SYSTEMS8-43

8-78. DEICING SYSTEMS8-44

8-79.–8-90. [RESERVED.]8-44

SECTION 5. INSPECTION OF PROPELLERS8-45

8-91. GENERAL8-45

8-92. WOOD OR COMPOSITION PROPELLERS AND BLADES8-45

8-93. METAL PROPELLERS AND BLADES8-47

8-94. PROPELLER HUB8-48

8-95. TACHOMETER INSPECTION8-49

8-96.–8-106. [RESERVED.]8-49

SECTION 6. PROPELLER TRACKING AND VIBRATION8-50

8-107. GENERAL8-50

8-108. PROPELLER TRACKING CHECK8-50

8-109. VIBRATION8-51

8-110.–8-129. [RESERVED.]8-51

CHAPTER 9. AIRCRAFT SYSTEMS AND COMPONENTS9-1

SECTION 1. INSPECTION AND MAINTENANCE OF LANDING GEAR9-1

9-1. GENERAL9-1

9-2. GENERAL INSPECTION9-1

9-3. CLEANING AND LUBRICATING9-1

9-4. FIXED-GEAR INSPECTION9-2

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9-5. INSPECTION OF RETRACTABLE LANDING GEAR9-3

9-6. EMERGENCY SYSTEMS9-4

9-7. LANDING-GEAR COMPONENTS9-4

9-8. FLOATS AND SKIS9-6

9-9. INSPECTION AND REPAIR OF FLOATS AND SKIS9-8

9-10. TYPES OF LANDING-GEAR PROBLEMS9-9

9-11. SPECIAL INSPECTIONS9-11

9-12. RETRACTION TESTS9-11

9-13. TIRE AND TUBE MAINTENANCE9-11

9-14. TIRE INSPECTION AND REPAIR9-12

9-15. INFLATION OF TIRES9-13

9-16. PERSONAL SAFETY9-14

9-17. DISASSEMBLE THE WHEEL9-14

9-18. REASSEMBLING THE WHEEL9-15

9-19. SLIPPAGE9-15

9-20. WHEEL INSPECTION9-15

9-21. WHEEL INSTALLATION9-15

9-22.–9-24. [RESERVED.]9-16

SECTION 2. HYDRAULIC SYSTEMS9-17

9-25. GENERAL9-17

9-26. PURPOSES OF HYDRAULIC SYSTEMS9-17

9-27. TYPES OF HYDRAULIC FLUID9-17

9-28. HANDLING HYDRAULIC FLUID9-18

9-29. HYDRAULIC SYSTEM MAINTENANCE PRACTICES9-19

9-30. HYDRAULIC LINES AND FITTINGS9-22

9-31.–9-36. [RESERVED.]9-34

SECTION 3. EMERGENCY EQUIPMENT9-35

9-37. LIFE RAFTS9-35

9-38. LIFE RAFT INSPECTIONS9-35

9-39. SURVIVAL KIT INSPECTION9-37

9-40. SPECIAL INSPECTIONS9-41

9-41. INSPECTION RECORD9-41

9-42. RAFT REPAIRS9-41

9-43. LIFE PRESERVERS9-44

9-44. LIFE PRESERVER INSPECTION9-45

9-45. REPAIR OF LIFE PRESERVERS9-46

9-46. MISCELLANEOUS EQUIPMENT9-46

9-47. OXYGEN SYSTEMS9-47

9-48. INSPECTION9-48

9-49. MAINTENANCE9-49

9-50. FUNCTIONAL TESTING AFTER REPAIR9-51

9-51. REQUIREMENTS FOR REQUALIFICATION OF OXYGEN CYLINDERS9-52

9-52.–9-59. [RESERVED.]9-55

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SECTION 4. CABIN INTERIOR9-56

9-60. GENERAL9-56

9-61. CAR 3 AIRCRAFT INTERIOR9-56

9-62. PART 23 AIRCRAFT INTERIOR9-56

9-63. SOURCE OF INFORMATION9-57

9-64. UPHOLSTERY AND/OR BELTS9-57

9-65.–9-70. [RESERVED.]9-57

CHAPTER 10. WEIGHT AND BALANCE10-1

SECTION 1. TERMINOLOGY10-1

10-1. GENERAL10-1

10-2. TERMINOLOGY10-1

10-3.–10-13. [RESERVED.]10-9

SECTION 2. WEIGHING PROCEDURES10-10

10-14. GENERAL10-10

10-15. PROCEDURES10-10

10-16. REPAIRS AND ALTERATIONS10-11

10-17. ANNUAL OR 100-HOUR INSPECTION10-11

10-18. W&B COMPUTATIONS10-12

10-19. W&B EXTREME CONDITIONS10-13

10-20. LOADING CONDITIONS AND/OR PLACARDS10-16

10-21. EQUIPMENT LIST10-19

10-22. EQUIPMENT CHANGE10-20

10-23. SAMPLE W&B REPORT10-21

10-24. INSTALLATION OF BALLAST10-24

10-25. LOADING SCHEDULE10-25

10-26.–10-34. [RESERVED.]10-25

CHAPTER 11. AIRCRAFT ELECTRICAL SYSTEMS11-1

SECTION 1. INSPECTION AND CARE OF ELECTRICAL SYSTEMS11-1

11-1. GENERAL11-1

11-2. INSPECTION AND OPERATION CHECKS11-1

11-3. FUNCTIONAL CHECK OF STAND-BY OR EMERGENCY EQUIPMENT11-2

11-4. CLEANING AND PRESERVATION11-2

11-5. BATTERY ELECTROLYTE CORROSION11-2

11-6. ADJUSTMENT AND REPAIR11-2

11-7. INSULATION OF ELECTRICAL EQUIPMENT11-3

11-8. BUS BARS11-3

11-9. ASTM INTERNATIONAL11-3

11-10.–11-14. [RESERVED.]11-4

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SECTION 2. STORAGE BATTERIES11-5

11-15. GENERAL11-5

11-16. BATTERY CHARGING11-5

11-17. BATTERY FREEZING11-5

11-18. TEMPERATURE CORRECTION11-6

11-19. BATTERY MAINTENANCE11-7

11-20. ELECTROLYTE SPILLAGE11-10

11-21. NOXIOUS FUMES11-10

11-22. INSTALLATION PRACTICES11-10

11-23.–11-29. [RESERVED.]11-12

SECTION 3. INSPECTION OF EQUIPMENT INSTALLATION11-13

11-30. GENERAL11-13

11-31. INSTALLATION CLEARANCE PROVISIONS11-13

11-32. WIRES, WIRE BUNDLES, AND CIRCUIT PROTECTIVE DEVICES11-13

11-33. ALTERNATOR DIODES11-13

11-34. STATIC ELECTRICAL POWER CONVERTERS11-13

11-35. ACCEPTABLE MEANS OF CONTROLLING OR MONITORING THE

ELECTRICAL LOAD11-14

11-36. ELECTRICAL LOAD DETERMINATION11-14

11-37. JUNCTION BOX CONSTRUCTION11-15

11-38.–11-46. [RESERVED.]11-15

SECTION 4. INSPECTION OF CIRCUIT-PROTECTION DEVICES11-16

11-47. GENERAL11-16

11-48. DETERMINATION OF CIRCUIT BREAKER RATINGS11-16

11-49. DC CIRCUIT PROTECTOR CHART11-16

11-50. RESETTABLE CIRCUIT PROTECTION DEVICES11-17

11-51. CIRCUIT BREAKER USAGE11-17

11-52. CIRCUIT BREAKER MAINTENANCE11-18

11-53. SWITCHES11-18

11-54. RELAYS11-22

11-55. LOAD CONSIDERATIONS11-23

11-56. OPERATING CONDITIONS FOR SWITCHES AND RELAYS11-23

11-57.–11-65. [RESERVED.]11-23

SECTION 5. ELECTRICAL WIRE RATING11-24

11-66. GENERAL11-24

11-67. METHODS FOR DETERMINING CURRENT CARRYING CAPACITY OF

WIRES11-28

11-68. INSTRUCTIONS FOR USE OF ELECTRICAL WIRE CHART11-29

11-69. COMPUTING CURRENT CARRYING CAPACITY11-33

11-70.–11-75. [RESERVED.]11-40

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SECTION 6. AIRCRAFT ELECTRICAL WIRE SELECTION11-41

11-76. GENERAL11-41

11-77. AIRCRAFT WIRE MATERIALS11-41

11-78. SUBSTITUTIONS11-43

11-79.–11-84. [RESERVED.]11-43

SECTION 7. TABLE OF ACCEPTABLE WIRES11-44

11-85. AIRCRAFT WIRE TABLE11-44

11-86. OPEN AIRFRAME INTERCONNECTING WIRE11-47

11-87. PROTECTED WIRE11-47

11-88. SEVERE WIND AND MOISTURE PROBLEMS (SWAMP)11-47

11-89. SHIELDED WIRE11-47

11-90.–11-95. [RESERVED.]11-48

SECTION 8. WIRING INSTALLATION INSPECTION REQUIREMENTS11-49

11-96. GENERAL11-49

11-97. WIRING REPLACEMENT11-52

11-98. TERMINALS AND TERMINAL BLOCKS11-53

11-99. FUSES AND FUSE HOLDERS11-53

11-100. CONNECTORS11-54

11-101. JUNCTION BOXES, PANELS, SHIELDS, AND

MICRO-SWITCH HOUSINGS11-55

11-102. RIGID METALLIC, FLEXIBLE METALLIC AND RIGID NONMETALLIC

CONDUIT11-55

11-103. JUNCTIONS11-55

11-104. CIRCUIT BREAKERS11-56

11-105. SYSTEM SEPARATION11-56

11-106. ELECTROMAGNETIC INTERFERENCE (EMI)11-56

11-107. INTERFERENCE TESTS11-56

11-108. IDENTIFICATION STENCILS AND PLACARDS ON ELECTRICAL

EQUIPMENT11-57

11-109.–11-114. [RESERVED.]11-57

SECTION 9. ENVIRONMENTAL PROTECTION AND INSPECTION11-58

11-115. MAINTENANCE AND OPERATIONS11-58

11-116. GROUP AND BUNDLE TIES11-58

11-117. MINIMUM WIRE BEND RADII11-59

11-118. SLACK11-59

11-119. DRIP LOOP IN WIRE BUNDLE11-60

11-120. POWER FEEDERS11-61

11-121. RF CABLE11-61

11-122. PRECAUTIONS11-61

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11-123. MOISTURE PROTECTION, WHEEL WELLS, AND

LANDING GEAR AREAS11-62

11-124. PROTECTION AGAINST PERSONNEL AND CARGO11-62

11-125. HEAT PRECAUTIONS11-62

11-126. MOVABLE CONTROLS WIRING PRECAUTIONS11-62

11-127. FLAMMABLE FLUIDS AND GASES11-62

11-128.–11-134. [RESERVED.]11-63

SECTION 10. SERVICE LOOP HARNESSES (PLASTIC TIE STRIPS)11-64

11-135. GENERAL11-64

11-136. SUPPORT11-64

11-137. ANTI-CHAFING MATERIAL11-64

11-138. STRAIN RELIEF11-64

11-139. “SERVICE LOOP”11-64

11-140.–11-145. [RESERVED.]11-65

SECTION 11. CLAMPING11-66

11-146. GENERAL11-66

11-147. WIRE AND CABLE CLAMPS INSPECTION11-66

11-148.–11-154. [RESERVED.]11-69

SECTION 12. WIRE INSULATION AND LACING STRING TIE11-70

11-155. GENERAL11-70

11-156. INSULATION MATERIALS11-70

11-157. STRIPPING INSULATION11-70

11-158. LACING AND TIES11-71

11-159. INSULATION TAPE11-74

11-160.–11-166. [RESERVED.]11-74

SECTION 13. SPLICING11-75

11-167. GENERAL11-75

11-168.–11-173. [RESERVED.]11-75

SECTION 14. TERMINAL REPAIRS11-76

11-174. GENERAL11-76

11-175. ATTACHMENT OF TERMINALS TO STUDS11-77

11-176. STUDS AND INSULATORS11-77

11-177. WIRE TERMINALS AND BINDING POSTS11-78

11-178. CRIMP ON TERMINAL LUGS AND SPLICES (pre-insulated crimp type)11-78

11-179. LOCK WASHERS FOR TERMINALS ON EQUIPMENT11-79

11-180.–11-184. [RESERVED.]11-79

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SECTION 15. GROUNDING AND BONDING11-80

11-185. GENERAL11-80

11-186. GROUNDING11-80

11-187. BONDING11-82

11-188. BONDING INSPECTION11-82

11-189. BONDING JUMPER INSTALLATIONS11-84

11-190. CREEPAGE DISTANCE11-89

11-191. FUEL SYSTEMS11-89

11-192. ELECTRIC SHOCK PREVENTION BONDING11-89

11-193. LIGHTNING PROTECTION BONDING11-89

11-194. LIGHTNING PROTECTION FOR ANTENNAS AND AIR DATA PROBES . 11-90

11-195. STATIC-DISCHARGE DEVICE11-90

11-196. CLEANING11-90

11-197. HARDWARE ASSEMBLY11-90

11-198.–11-204. [RESERVED.]11-91

SECTION 16. WIRE MARKING11-92

11-205. GENERAL11-92

11-206. WIRE IDENTIFICATION11-92

11-207. IDENTIFICATION AND INFORMATION RELATED TO THE WIRE AND

WIRING DIAGRAMS11-92

11-208. PLACEMENT OF IDENTIFICATION MARKINGS11-92

11-209. TYPES OF WIRE MARKINGS11-93

11-210. HOT STAMP MARKING11-94

11-211. DOT MATRIX MARKING11-94

11-212. INK JET MARKING11-94

11-213. LASER MARKING11-95

11-214. IDENTIFICATION SLEEVES11-95

11-215. IDENTIFICATION TAPE11-95

11-216. OPERATING CONDITIONS11-96

11-217. INSTALLATION OF PRINTED SLEEVES11-96

11-218. IDENTIFICATION OF WIRE BUNDLES AND HARNESSES11-96

11-219. TERMINAL MARKING SLEEVE AND TAGS11-97

11-220. SLEEVES AND CABLE MARKERS SELECTION11-98

11-221. TEMPORARY WIRE AND CABLE MARKING PROCEDURE11-103

11-222. MARKER SLEEVE INSTALLATION AFTER PRINTING11-103

11-223.–11-229. [RESERVED.]11-104

SECTION 17. CONNECTORS11-105

11-230. GENERAL11-105

11-231. SELECTION11-105

11-232. TYPES OF CONNECTORS11-105

11-233. VOLTAGE AND CURRENT RATING11-111

11-234. SPARE CONTACTS (FUTURE WIRING)11-111

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11-235. INSTALLATION11-112

11-236. FEED-THROUGH BULKHEAD WIRE PROTECTION11-113

11-237. SPECIAL PURPOSE CONNECTOR11-113

11-238. POTTING COMPOUNDS11-113

11-239. POTTING CONNECTORS11-113

11-240. THROUGH BOLTS11-114

11-241.–11-247. [RESERVED.]11-114

SECTION 18. CONDUITS11-115

11-248. GENERAL11-115

11-249. SIZE OF CONDUIT11-115

11-250. CONDUIT FITTINGS11-115

11-251. CONDUIT INSTALLATION11-115

11-252. RIGID CONDUIT11-115

11-253. FLEXIBLE CONDUIT11-116

11-254.–11-259. [RESERVED.]11-117

SECTION 19. UNUSED CONNECTORS AND UNUSED WIRES11-118

11-260. GENERAL11-118

11-261. QUICK REFERENCE CHART11-118

11-262. UNPRESSURIZED AREA CONNECTORS11-118

11-263. PRESSURIZED AREAS11-120

11-264.–11-270. [RESERVED.]11-120

SECTION 20. ELECTRICAL AND ELECTRONIC SYMBOLS11-121

11-271. GENERAL11-121

11-272. SYMBOLS11-121

11-273.–11-283. [RESERVED.]11-134

CHAPTER 12. AIRCRAFT AVIONICS SYSTEMS12-1

SECTION 1. AVIONICS EQUIPMENT MAINTENANCE12-1

12-1. GENERAL12-1

12-2. HANDLING OF COMPONENTS12-1

12-3.–12-7. [RESERVED.]12-1

SECTION 2. GROUND OPERATIONAL CHECKS FOR AVIONICS EQUIPMENT

(ELECTRICAL)12-2

12-8. GENERAL12-2

12-9. INSPECTION OF AVIONICS SYSTEMS12-2

12-10. COMMUNICATION SYSTEMS12-4

12-11. VHF OMNI-DIRECTIONAL RANGE (VOR)12-4

12-12. DISTANCE MEASURING EQUIPMENT (DME)12-4