SECTION I INTRODUCTIONGENERAL INFORMATION - TM-1-1520-265-23_29Table 1-1. Supporting Technical DocumentationSpecial Terms, Abbreviations, and Acronyms1.1.3. Inspection Item CodeMETHOD OF INSPECTION USED IN ILLUSTRATIONS TO IDENTIFY THE TYPE OF INSPECTION METHODS BEING ILLUSTRATEDFigure 1-2. General Configuration of UH-60A HelicopterFigure 1-3. Stations, Waterlines, and Buttlines (Sheet 1 of 2)Figure 1-3. Stations, Waterlines, and Buttlines (Sheet 2 of 2)TYPE OF CONSTRUCTIONFlight Control System.Figure 1-4. Access and Inspection Provisions (Sheet 1 of 2)Figure 1-4. Access and Inspection Provisions (Sheet 2 of 2)Table 1-2. Access Panels and FairingTable 1-2. Access Panels and Fairing - ContinuedMARKING AND/OR RECORDING OF INSPECTION RESULTSSelecting the NDI Method.NDI General Safety PrecautionsFigure 1-5. Bond Testing Reference Block DisplaysFluorescent Penetrant (PT) MethodTable 1-3. Penetrant Procedure (Type I, Method A)Table 1-4. Penetrant Procedure (Type I, Method B)Table 1-5. Penetrant Procedure-Portable or Field Application (Type I, Method C)Table 1-6. Penetrant Procedure (Type I, Method D)Safety Precautions During Fluorescent Penetrant InspectionMagnetic Particle (MT) MethodMagnetic Particle Inspection EquipmentFigure 1-6. Portable Magnetic Particle Inspection EquipmentDemagnetization of Inspection PartsRadiation HazardSafety Precautions During Eddy Current Inspection Bolthole InspectionFigure 1-7. Signatures of EDM Notches in Test BlockFigure 1-8. Typical Metal Sorting DisplayUltrasonic Instrument Standardization.Acceptance/Rejection CriteriaTable 1-7. Equipment Used for NDITable 1-8. M aterials Used for NDITable 1-8. M aterials Used for NDI - Continued - TM-1-1520-265-23_67Table 1-8. M aterials Used for NDI - Continued - TM-1-1520-265-23_68SECTION II ROTOR SYSTEMTable 2-1. Rotor System Inspection Index - ContinuedFigure 2-1. Rotor System (Sheet 1 of 2)Figure 2-1. Rotor System (Sheet 2 of 2)SPLIT CONES (PT)FERROUS ROTOR SYSTEM BOLTS AND PINS (MT)NONFERROUS ROTOR SYSTEM BOLTS AND PINSMAIN ROTOR SHAFT NUT (MT)MAIN ROTOR HUB (ET)2.6.3.2 Preparation of HelicopterFigure 2-6. M ain Rotor Hub2.7.3.2 Preparation of HelicopterFigure 2-7. SpindleANTIFLAP BRACKET (ET)2.8.3.5 NDI Equipment SettingsFigure 2-8. Antiflap BracketPrimary Method. Eddy Current.2.9.3.6 Inspection ProcedureBALANCE WEIGHT BRACKET (MT)Figure 2-10. Balance Weight BracketMarking and Recording of Inspection Results 2.11.3.2 Preparation of HelicopterFigure 2-11. Spindle HornAircraft Marking Pencil, refer to Table 1-8Figure 2-12. Droop Stop CamNDI Equipment and Materials. (Refer to Appendix B.)PITCH CONTROL RODS (ET)Figure 2-13. Damper AssemblyPreparation of PartFigure 2-14 Pitch Control Rods2.15.3.5 NDI Equipment SettingsFigure 2-15. Rotating SwashplateLOWER LINK (ET)NDI Equipment Settings - TM-1-1520-265-23_103BIFILAR VIBRATION ABSORBER (ET).NDI Equipment Settings - TM-1-1520-265-23_105Figure 2-17. Bifilar Vibration AbsorberBIFILAR WEIGHT (UT)(SETUP - DEFAULT SETTINGS)Ultrasonic MethodFigure 2-18. Bifilar Weight (Sheet 1 of 3)Bifilar Weight Bushings (PT)BIFILAR WEIGHT TAPERED WASHERS (PT) MAIN ROTOR BLADE TIP CAP FAIRING (ET).Backup MethodFigure 2-19. Main Rotor Blade Tip Cap FairingFigure 2-20. Main Rotor Blade (Voids)Maintenance Platforms/Workstands - TM-1-1520-265-23_118MAIN ROTOR BLADE CUFF ASSEMBLY (ET).NDI Equipment and MaterialsInspection Procedure - TM-1-1520-265-23_121Defects.Attach cable and probe to BondmasterFigure 2-22. Tail Rotor Blade (Voids)TAIL ROTOR BLADE (FLUID) (RT)Inspection Procedure - TM-1-1520-265-23_126Figure 2-23. Tail Rotor Blade (Fluid) (Sheet 1 of 2)Figure 2-23. Tail Rotor Blade (Fluid) (Sheet 2 of 2)Maintenance Platforms/Workstands - TM-1-1520-265-23_129Figure 2-24. Tail Rotor Blade Tip CapAccess. Not applicableTAIL ROTOR PITCH CONTROL ROD ENDS (MT)Figure 2-25. Tail Rotor Pitch HornPreparation of Part.Figure 2-26. Tail Rotor Pitch Control Rod EndsPITCH BEAM WASHER (MT).Figure 2-27. Pitch Beam WasherPITCH BEAM RETAINING NUT (MT) - TM-1-1520-265-23_138 Preparation of Part The part shall be thoroughly cleanedFigure 2-28. Pitch Beam Retaining NutPrimary MethodTAIL ROTOR INBOARD/OUTBOARD RETENTION PLATES (ET)Figure 2-29. Pitch BeamNORTEC-19eFigure 2-30 Tail Rotor Inboard/Outboard Retention PlatesSystem SecuringSECTION III DRIVE SYSTEMFigure 3-1. Transmission/Drive SystemMAIN TRANSMISSION (ET)INTERMEDIATE GEARBOX (ET)Figure 3-2. Main TransmissionAccessFigure 3-3. Intermediate GearboxTAIL ROTOR DRIVE SHAFT (ET)System SecuringFigure 3-4. Tail Rotor Drive ShaftTAIL ROTOR DRIVE SHAFT SUPPORTS (ET)Inspect the partTAIL ROTOR DRIVE SHAFT COUPLING (PT) - TM-1-1520-265-23_159Figure 3-6. Tail Rotor Drive Shaft Coupling Eddy Current MethodFigure 3-7. O il Cooler Drive ShaftHand-held magnetic coil may be used - TM-1-1520-265-23_163OIL COOLER FAN BLADES (ET)Make the following initial settings on the Eddy Current Inspection Unit, NORTEC-1 9eTAIL GEARBOX (ET)Preparation of Helicopter - TM-1-1520-265-23_167Figure 3-10. Tail GearboxTAIL GEARBOX MOUNT FITTING (ET)Refer to Eddy Current Method, paragraph Figure 3-11. Tail Gearbox Mount FittingFigure 3-12. Tail Rotor Gearbox Inner/Outer Split ConesSECTION IV AIRFRAME AND LANDING GEAR SYSTEMTable 4-1. Airframe and Landing Gear System Inspection Index - ContinuedFigure 4-1. Airframe and Landing Gear SystemAIRFRAME SKIN, PANELS, DOORS, COVERS, AND FAIRINGS - METAL (ET)System Securing.Figure 4-2. Airframe Skin, Panels, Doors, Covers, and Fairings - MetalHONEYCOMB AND COMPOSITE STRUCTURES (BT)Press SET and select DISPLAY - PHASE.Figure 4-3. Honeycomb and Composite StructuresFLUID IN HONEYCOMB CORE PANELS AND STRUCTURES (RT)Figure 4-4. Fluid in Honeycomb Core Panels and Structures (Sheet 1 of 2)Figure 4-4. Fluid in Honeycomb Core Panels and Structures (Sheet 2 of 2)VIBRATION ABSORBER SPRINGS (MT)DemagnetizationFigure 4-5. Vibration Absorber SpringsVIBRATION ABSORBER STRUCTURAL FITTINGS (ET) - TM-1-1520-265-23_188Null probe on test block - TM-1-1520-265-23_189Figure 4-6. Vibration Absorber Structural FittingsALUMINUM STRUCTURAL BEAMS AND FRAMES (ET) - TM-1-1520-265-23_191Figure 4-7. Roll Vibration AbsorberEddy Current InspectionFigure 4-8. Aluminum Structural Beams and FramesPILOT/COPILOT SEAT MIDFRAME SUPPORT (MT)Figure 4-9. Pilot/Copilot Seat Midframe SupportAircraft Marking PencilFigure 4-10. Troop/Cargo Door Upper TrackGUNNER'S WINDOW LOWER TRACK (ET)GUNNER'S WINDOW UPPER TRACK (ET)Figure 4-11. Gunner's Window Lower TrackNull probe on test block - TM-1-1520-265-23_202Figure 4-12. Gunner's Window Upper TrackTROOP/CARGO DOOR LOWER TRACK (ET)OIL COOLER COMPARTMENT ACCESS DOOR (PT)Figure 4-13. Troop/Cargo Door Lower TrackFigure 4-14. Oil Cooler Compartment Access DoorTAIL PYLON ATTACH FITTING (ET)TAIL ROTOR PYLON SKIN, STATION 200 (ET) - TM-1-1520-265-23_209Figure 4-15. Tail Pylon Attach FittingPreparation of PartFigure 4-16. Tail Rotor Pylon Skin, Station 200TAIL ROTOR PYLON ATTACHING HARDWARE (PT)Figure 4-17. Tail Rotor Pylon Attaching HardwareTAIL PYLON LOWER STEP (ET)STABILATOR ATTACH FITTING (ET).Figure 4-18. Tail Pylon Lower Step4.19.3.2. Preparation of HelicopterFigure 4-19. Stabilator Attach FittingHand-held magnetic coil may be used - TM-1-1520-265-23_220Figure 4-20. Stabilator Actuator Attach FittingsSTABILATOR ACTUATOR HOUSING (PT)Figure 4-21. Stabilator Actuator HousingPreparation of Helicopter - TM-1-1520-265-23_224Figure 4-22. Drag Beam Support FittingMAIN LANDING GEAR DRAG BEAM (MT)4.23.3.2. Preparation of HelicopterFigure 4-23. Main Landing Gear Drag Beam4.24.3. Primary Method4.24.3.6. Inspection ProcedureFigure 4-24. Main Landing Gear Shock Strut Upper Cylinder4.25.3.2. Preparation of HelicopterFigure 4-25. Main Landing Gear Shock Strut Lower Stage Piston4.26.3. Primary Method. Eddy Current4.26.3.6. Inspection ProcedureMAIN LANDING GEAR BRAKE (MT).Figure 4-27. Main Landing Gear Brake4.28. MAIN LANDING GEAR BRAKE HOUSING (ET)4.28.3.5. NDI Equipment SettingsFigure 4-28. Main Landing Gear Brake Housing4.29 PARKING BRAKE VALVE COMPONENTS (PT)4.30 SLAVE MIXER VALVE PARTS (PT)Figure 4-30. Slave M ixer Valve Parts4.31.3.2. Preparation of HelicopterFigure 4-31. Tail Landing Gear YokeTAIL LANDING GEAR FORK (ET)4.32.3.6 Inspection ProcedureTAIL LANDING GEAR LOCK ACTUATOR ASSEMBLY (MT)TAIL LANDING GEAR WHEEL ASSEMBLY (ET)Figure 4-33. Tail Landing Gear Lock Actuator Assembly4.34.3.2. Preparation of HelicopterFigure 4-34. Tail Landing Gear Wheel Assembly4.35.3.2 Preparation of HelicopterFigure 4-35. Cargo HookTable 5-1. Power Plant System Inspection IndexFigure 5-1. Power Plant System5.2 DESWIRL DUCT VANES AND LOOP CLAMP (PT)Figure 5-2. Deswirl Duct Vanes and Loop Clamp5.4 AIR INLET ASSEMBLY AND BLEED-AIR EXHAUST SLOTS (ET).Figure 5-3. Engine Tubing, Couplings, Air Ducts, Fittings, Supports, Brackets, and ClipsFigure 5-4. Air Inlet Assembly and Bleed-Air Exhaust SlotsAFT ENGINE MOUNT STRUTS (IT).5.5.3.3 AccessFigure 5-5. Aft Engine Mount StrutsBackup Method. Fluorescent PenetranFigure 5-6. Aft Engine Mount FittingsAFT ENGINE MOUNT LINKS (PT)Figure 5-7. Aft Engine Mount Links5.8.3.2 Preparation of HelicopterFigure 5-8. Aft Engine Mount SupportCROTCH ASSEMBLY AND SEGMENT RING (PT)FORWARD SUPPORT TUBE (PT)Figure 5-10. Forward Support TubeEXHAUST EJECTOR AND ATTACHING ANGLES (PT)EXHAUST FAIRINGS (PT)HIRSS AND NACELLE FAIRING SUPPORT MOUNTS (PT)SUPPRESSOR CORE AND BAFFLE (PT) - TM-1-1520-265-23_277Figure 5-13. HIRSS and Nacelle Fairing Support M ountsHIRSS EXHAUST EXTENDER (PT)Figure 5-14. Suppressor Core and Baff leFigure 5-15. HIRSS Exhaust ExtenderROTARY INPUT ASSEMBLY (PT)ENGINE LOAD DEMAND CONTROL CABLE SUPPORT (PT)ENGINE AIR INLET V BAND CLAMP (PT)Figure 5-18. Engine Air I nlet V Band Clamp5.19.3.2 Preparation of HelicopterFigure 5-19. Starter FlangeENGINE LOAD DEMAND SPINDLE BELLCRANK SUPPORT (ET)5.21.3.1 NDI Equipment and MaterialsENGINE COMPONENTS (PT) - TM-1-1520-265-23_2905.22.2 Defects5.22.2 DefectsSECTION VI FLIGHT CONTROL SYSTEMTable 6-1. Flight Control System Inspection Index - ContinuedFigure 6-1. Flight Control System6.2 TOE PEDAL ACTUATOR (PT)6.3 TOE PEDAL ASSEMBLY (ET)6.3.4 Backup Method6.4 YAW PEDAL SUPPORT SHAFT (MT) YAW PEDAL BRAKE CYLINDER SUPPORTS (ET)6.5.3.3 AccessPEDAL ADJUSTER ARMS AND LINK (ET).6.6.3.5 NDI Equipment SettingsPILOT/COPILOT CYCLIC AND COLLECTIVE STICK SOCKET (ET)6.7.3.4 Preparation of PartFigure 6-7. Pilot/Copilot Cyclic and Collective Stick SocketFigure 6-8. Collective Boost and Yaw Boost Servo Input/Output Piston Shafts and CylindersYAW/PITCH COUPLING LINK (ET)6.9.3.4 Preparation of PartFigure 6-9. Yaw/Pitch Coupling Link6.10.3.2 Preparation of Helicopter NONFERROUS FLIGHT CONTROL SYSTEM PUSH-PULL RODS (ET)6.11.3.5 NDI Equipment SettingsPILOT COLLECTIVE STICK BELLCRANK SUPPORT (ET)6.12.3.4 Preparation of PartPILOT/COPILOT COLLECTIVE STICK SUPPORT (ET)6.13.3.5 NDI Equipment SettingsFigure 6-13. Pilot/Copilot Collective Stick Support6.14 PILOT COLLECTIVE STICK BELLCRANK (ET)Marking and Recording of Inspection ResultsFERROUS CONNECTING LINKS, ROD ENDS, CLEVISES, LEVERS, AND ATTACHING PARTS (MT)Figure 6-15. Ferrous Connecting Links, Rod Ends, Clevises, Levers, and Attaching PartsNONFERROUS CONNECTING LINKS, ROD ENDS, CLEVISES, LEVERS, AND ATTACHING PARTS (ET)6.16.3.5 NDI Equipment SettingsFigure 6-16. Nonferrous Connecting Links, Rod Ends, Clevises, Levers, and Attaching PartsSWASHPLATE LINKS (MT)Figure 6-17. Swashplate Links6.18.3.2 Preparation of HelicopterFigure 6-18. Walking Beam6.19.3.2 Preparation of HelicopterLATERAL BELLCRANK (MT)6.20.3.4 Preparation of PartAFT BELLCRANK (MT)Figure 6-21. Aft BellcrankHYDRAULIC/PNEUMATIC SYSTEM COMPONENTS (PT) - TM-1-1520-265-23_335Figure 6-22. Hydraulic/Pneumatic System ComponentsAPPENDIX A MAINTENANCE ALLOCATION CHART NONDESTRUCTIVE INSPECTIONAPPENDIX A MAINTENANCE ALLOCATION CHART NONDESTRUCTIVE INSPECTION CONT. - TM-1-1520-265-23_338APPENDIX A MAINTENANCE ALLOCATION CHART NONDESTRUCTIVE INSPECTION CONT. - TM-1-1520-265-23_339APPENDIX A MAINTENANCE ALLOCATION CHART NONDESTRUCTIVE INSPECTION CONT. - TM-1-1520-265-23_340APPENDIX A MAINTENANCE ALLOCATION CHART NONDESTRUCTIVE INSPECTION CONT. - TM-1-1520-265-23_341APPENDIX A MAINTENANCE ALLOCATION CHART NONDESTRUCTIVE INSPECTION CONT. - TM-1-1520-265-23_342APPENDIX A MAINTENANCE ALLOCATION CHART NONDESTRUCTIVE INSPECTION CONT. - TM-1-1520-265-23_343APPENDIX B EQUIPMENT LISTINGAPPENDIX B EQUIPMENT LISTING CONT. - TM-1-1520-265-23_346APPENDIX B EQUIPMENT LISTING CONT. - TM-1-1520-265-23_347APPENDIX B EQUIPMENT LISTING CONT. - TM-1-1520-265-23_348APPENDIX C ILLUSTRATED FIELD MANUFACTURE ITEMS LISTFigure C-1. Composite Test BlocksAluminum Structural Beams and Frames (ET) - TM-1-1520-265-23_352Crotch Assembly and Segment Ring (ET)Engine Components (PT) - TM-1-1520-265-23_354Ferrous Bolts and Pins Contained within the Airframe and Landing Gear System (MT)General Information - TM-1-1520-265-23_356Hydraulic/Pneumatic System Components (PT) - TM-1-1520-265-23_357Main Landing Gear Shock Strut Lower Stage Piston (MT)Main Rotor Shaft Nut (MT) Nonferrous Flight Control System Push-Pull Rods (ET)Pedal Adjuster Arms and Link (ET)Pitch Beam Retaining Nut (MT) - TM-1-1520-265-23_362Spindle (ET)Suppressor Core and Baffle (PT) - TM-1-1520-265-23_364Tail Landing Gear Yoke (ET)Tail Rotor Drive Shaft Coupling (PT) - TM-1-1520-265-23_366Tail Rotor Pylon Skin, Station 200 (ET) - TM-1-1520-265-23_367Vibration Absorber Structural Fittings (ET) - TM-1-1520-265-23_368