BELL HELICOPTER 407 Series User Manual

BHT-407-MM-1
NOTICE
The instructions set forth in this manual, as supplemented or modified by Alert Service Bulletins (ASB) or
other directions issued by Bell Helicopter Textron Inc. and Airworthiness Directives (AD) issued by the
applicable regulatory agencies, shall be strictly followed.
Export Classification C, ECCN EAR99
22 FEBRUARY 1996
REVISION 47 — 2 MAY 2019
COPYRIGHT NOTICE
COPYRIGHT
201
BELL
® HELICOPTER TEXTRON INC.
AND BELL HELICOPTER TEXTRON
CANADA LTD.
ALL RIGHTS RESERVED
MAINTENANCE MANUAL
VOLUME 1
GENERAL INFORMATION

BELL HELICOPTER 407 Series Specifications

General

Brand	BELL HELICOPTER
Model	407 Series
Category	Toy
Language	English

Summary

MAINTENANCE MANUAL VOLUME 1

GENERAL INFORMATION

Provides general information and notices for the maintenance manual.

CUSTOMER SUPPORT AND SERVICES

SPARE PARTS WARRANTY

ONE YEAR/1,000 HOURS PRORATED

Details the warranty terms and conditions for spare parts.

CHAPTER 4 — AIRWORTHINESS LIMITATIONS SCHEDULE

AIRWORTHINESS LIMITATIONS SCHEDULE

Lists mandatory airworthiness limitations for components.

4-1. AIRWORTHINESS LIMITATIONS SCHEDULE

Table 4-1. Airworthiness Limitations Schedule

Table 4-1. Airworthiness Limitations Schedule (Cont)

Table 4-2. Inspection Limitations Schedule

Table 4-2. Inspection Limitations Schedule (Cont)

Figure 4-5. Tailboom Assembly — 300-Hour Inspection (Sheet 1 of 6)

Figure 4-5. Tailboom Assembly — 300 Hour Inspection (Sheet 2 of 6)

Figure 4-5. Tailboom Assembly — 300 Hour Inspection (Sheet 3 of 6)

Figure 4-5. Tailboom Assembly — 300 Hour Inspection (Sheet 4 of 6)

Figure 4-5. Tailboom Assembly — 300 Hour Inspection (Sheet 5 of 6)

Figure 4-5. Tailboom Assembly — 300 Hour Inspection (Sheet 6 of 6)

Figure 4-7. Tailboom Assembly — 100-Hour Inspection (Sheet 1 of 7)

Figure 4-7. Tailboom Assembly — 100-Hour Inspection (Sheet 2 of 7)

Figure 4-7. Tailboom Assembly — 100-Hour Inspection (Sheet 3 of 7)

Figure 4-7. Tailboom Assembly — 100-Hour Inspection (Sheet 4 of 7)

Figure 4-7. Tailboom Assembly — 100-Hour Inspection (Sheet 5 of 7)

Figure 4-7. Tailboom Assembly — 100-Hour Inspection (Sheet 6 of 7)

Figure 4-7. Tailboom Assembly — 100-Hour Inspection (Sheet 7 of 7)

CHAPTER 5 — INSPECTIONS AND COMPONENT OVERHAUL SCHEDULE

INSPECTIONS

Details various types of inspections for the helicopter and its components.

SCHEDULED INSPECTIONS

Lists scheduled maintenance tasks based on operating time or calendar.

SPECIAL INSPECTIONS

Covers inspections required for specific events or intervals.

CONDITIONAL INSPECTIONS

Details inspections triggered by specific events or malfunctions.

5-1. GENERAL

5-4. TYPES OF INSPECTIONS

5-7. SCHEDULED INSPECTIONS

5-8. AIRFRAME INSPECTION PROGRAM

5-9. Airframe Progressive Inspection Program

5-10. Airframe Periodic Inspection Program

Describes the periodic inspection program for the airframe.

5-11. CHANGING INSPECTION PROGRAM

5-12. PROGRESSIVE INSPECTION — EVENT #1

MAIN ROTOR SYSTEM

Detailed inspection procedures for the main rotor system.

5-12. PROGRESSIVE INSPECTION — EVENT #1 (CONT)

TAIL ROTOR ASSEMBLY

Detailed inspection procedures for the tail rotor assembly.

5-13. PROGRESSIVE INSPECTION — EVENT #2

5-13. PROGRESSIVE INSPECTION — EVENT #2 (CONT)

TRANSMISSION AND PYLON ASSEMBLY

Inspection of the transmission and pylon assemblies.

HYDRAULIC

Inspection of the helicopter's hydraulic system.

5-14. PROGRESSIVE INSPECTION — EVENT #3

5-14. PROGRESSIVE INSPECTION — EVENT #3 (CONT)

TAIL ROTOR FORWARD SHORT SHAFT ASSEMBLY

Inspection of the tail rotor forward short shaft assembly.

5-15. PROGRESSIVE INSPECTION — EVENT #4

OIL SYSTEM

Inspection of the engine and transmission oil cooling system.

5-15. PROGRESSIVE INSPECTION — EVENT #4 (CONT)

AFT SHORT SHAFT ASSEMBLY

Inspection of the aft short shaft assembly.

TAIL ROTOR DRIVESHAFT

Inspection of the tail rotor driveshaft and its components.

TAILBOOM STRUCTURE

Inspection of the tailboom structure for damage and security.

5-16. PROGRESSIVE INSPECTION — EVENT #5

EQUIPMENT AND FURNISHING

Inspection of cabin equipment and furnishings.

5-16. PROGRESSIVE INSPECTION — EVENT #5 (CONT)

ELECTRICAL

Inspection of aircraft electrical systems.

5-17. PROGRESSIVE INSPECTION — EVENT #6

5-17. PROGRESSIVE INSPECTION — EVENT #6 (CONT)

CORROSION CONTROL

Procedure for corrosion inspection.

5-18. AIRFRAME PERIODIC INSPECTION

5-18A. 150 HOUR INSPECTION

5-19. 300 HOUR INSPECTION FOR OPTIONAL EQUIPMENT

ROTOR BRAKE

Inspection of the rotor brake assembly.

5-19. 300 HOUR INSPECTION FOR OPTIONAL EQUIPMENT (CONT)

AUXILIARY FUEL TANK

Inspection of the auxiliary fuel tank installation.

5-20. 600 HOUR INSPECTION

MAIN ROTOR FRAHM

Inspection of the main rotor Frahm assembly.

5-21. 600 HOUR OR 12 MONTH INSPECTION

5-21. 600 HOUR OR 12 MONTH INSPECTION (CONT)

SEALED LEAD ACID (SLA) BATTERY

Service and inspection of the sealed lead-acid battery.

5-22. 12 MONTH INSPECTION

SERVO ACTUATORS

Inspection of servo actuators.

5-22. 12 MONTH INSPECTION (CONT)

MAIN ROTOR MAST

ENGINE

Inspection related to the engine.

5-23. 24 MONTH INSPECTION

5-23A. 1200 HOUR INSPECTION

5-24. 1200 HOUR OR 24 MONTH INSPECTION

AUTOMATIC FLIGHT CONTROL SYSTEM (AFCS)

Inspection of AFCS components in the vertical tunnel.

5-24A. 2500 HOUR INSPECTION

5-25. SPECIAL INSPECTIONS

Freewheel Lubrication System

5-25A. FREEWHEEL LUBRICATION SYSTEM

5-26. CONDITIONAL INSPECTIONS

5-27. HARD LANDING (CONT)

FORWARD FUSELAGE

Inspection of forward fuselage after a hard landing.

LANDING GEAR

Inspection of landing gear after a hard landing.

FUEL SYSTEM

Inspection of fuel system after a hard landing.

TAIL ROTOR BLADE ASSEMBLY

DRIVE TRAIN SYSTEM

MAIN AND TAIL ROTOR FLIGHT CONTROLS

AIRFRAME

Inspection of airframe after a hard landing.

INTERMEDIATE FUSELAGE

HYDRAULIC SYSTEM

5-28. SUDDEN STOPPAGE — MAIN ROTOR — POWER “ON” OR “OFF” (CONT)

SWASHPLATE ASSEMBLY

Inspection of swashplate assembly after sudden stoppage.

MAIN ROTOR HUB ASSEMBLY

TAIL ROTOR DRIVESHAFTS

ENGINE TO TRANSMISSION DRIVESHAFT

Inspection of engine to transmission driveshaft.

CONTROL SYSTEM

5-29. SUDDEN STOPPAGE — TAIL ROTOR — POWER “ON” OR “OFF”

FREEWHEEL ASSEMBLY

Inspection of freewheel assembly after tail rotor sudden stoppage.

5-31A. ENGINE COMPRESSOR STALL OR SURGE (CONT)

PART II: INSPECTION FOR COMPRESSOR STALL OR SURGE WITHOUT NOTICEABLE YAW

ROTATING CONTROL SYSTEM

SPECIAL INSPECTION

Special inspection of chip detectors after 25 hours of operation.

PART III: INSPECTION FOR COMPRESSOR STALL OR SURGE WITH NOTICEABLE YAW

FUSELAGE

DRIVE SYSTEM

TAIL ROTOR HUB AND BLADES

ENGINE-TO-TRANSMISSION MAIN DRIVESHAFT

MAIN ROTOR HUB AND BLADES

TRANSMISSION ASSEMBLY

5-32. AFTER LIGHTNING STRIKE (CONT)

TAIL ROTOR GEARBOX

Inspection of tail rotor gearbox after lightning strike.

MAIN ROTOR HUB AND BLADE

Detailed inspection of main rotor hub and blade after lightning strike.

MAIN ROTOR HUB BLADES

MAIN ROTOR CONTROLS

MAIN DRIVESHAFT ASSEMBLY

TAIL ROTOR FLIGHT CONTROL

TAIL ROTOR HUB AND BLADE ASSEMBLY

ELECTRICAL AND AVIONICS

SWASHPLATE

FREEWHEEL

POWER PLANT

TRANSMISSION AND MAST ASSEMBLY

5-33. COMPONENT INTERIM INSPECTION SCHEDULE

5-34. COMPONENT OVERHAUL SCHEDULE

Table 5-5. Component Overhaul Schedule

Table 5-5. Component Overhaul Schedule (Cont)

APPENDIX A

M407 INSPECTION — CHECKLIST

GENERAL

General requirements for ensuring all inspections and tests are completed.