Textron Bell 412EP User Manual

BHT-412-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
REISSUE — 23 JUNE 1994
REVISION 27 — 25 SEPTEMBER 2018
COPYRIGHT NOTICE
COPYRIGHT
201
BELL
® HELICOPTER TEXTRON INC.
AND BELL HELICOPTER TEXTRON
CANADA LTD.
ALL RIGHTS RESERVED
MAINTENANCE MANUAL
VOLUME 1
GENERAL INFORMATION

Textron Bell 412EP Specifications

General

Brand	Textron
Model	Bell 412EP
Category	Toy
Language	English

Summary

SPARE PARTS WARRANTY

CHAPTER 4 — AIRWORTHINESS LIMITATIONS SCHEDULE

4-1. AIRWORTHINESS LIMITATIONS SCHEDULE

Schedule detailing mandatory component life limits and intervals.

CHAPTER 5 — INSPECTIONS

SCHEDULED INSPECTIONS

5-4. SCHEDULED INSPECTIONS

5-6. 100 HOUR/12 MONTH INSPECTION — PART A

Detailed tasks for 100-hour/12-month inspections on Part A program.

5-8. 5000 HOUR/5 YEAR INSPECTION — PART A

Detailed tasks for 5000-hour/5-year inspections on Part A program.

5-9. 25 HOUR/30 DAY INSPECTION — PART B

Detailed tasks for 25-hour/30-day inspections on Part B program.

5-10. 300 HOUR/12 MONTH INSPECTION — PART B

Detailed tasks for 300-hour/12-month inspections on Part B program.

5-11. 600 HOUR/12 MONTH INSPECTION — PART B

Detailed tasks for 600-hour/12-month inspections on Part B program.

5-12. 5000 HOUR/5 YEAR INSPECTION — PART B

Detailed tasks for 5000-hour/5-year inspections on Part B program.

5-5. DAILY INSPECTION — PART A

Detailed tasks for daily pre-flight inspections on Part A program.

TRANSMISSION

MAIN ROTOR MAST

MAIN ROTOR BLADES

SPECIAL INSPECTIONS

5-13. SPECIAL INSPECTION

5-14. DAILY/10 HOUR INSPECTION, WHICHEVER OCCURS FIRST UNTIL 250 HOURS

5-16. BETWEEN 5 AND 10 HOURS OF FLIGHT AFTER EACH INSTALLATION

5-18. EACH 25 HOURS OF TAIL ROTOR OPERATION

5-21. EACH 100 HOURS OF COLLECTIVE LEVER OPERATION

5-23. EACH 600 HOURS OF TAIL ROTOR DRIVESHAFT OPERATION OR 12 MONTHS

5-24. EACH 600 HOURS OF MAIN DRIVESHAFT OPERATION OR 12 MONTHS

5-26. EACH 12 MONTHS OR 2500 LANDINGS OF AFT HIGH CROSSTUBE OPERATION

5-28. EACH 2500 HOURS OF MAIN ROTOR HUB ASSEMBLY OPERATION

5-30. EACH 2500 OR 3000 HOURS OF MAIN ROTOR MAST (412-040-366-109 AND SUBSEQUENT) OPERATION

5-31. EACH 2500 HOURS OF TAIL ROTOR DRIVE SYSTEM OPERATION

5-32. EACH 3000 HOURS OF MAIN ROTOR MAST (412-040-366-103 AND -105) OPERATION

5-33. EACH 3000 HOURS OF TRANSMISSION (412-040-002) OPERATION

5-34. EACH 3000 HOURS OF TRANSMISSION (412-040-004) OPERATION

COMPONENT OVERHAUL SCHEDULE

5-44. COMPONENT OVERHAUL SCHEDULE

CONDITIONAL INSPECTIONS

5-37. AFTER HARD LANDING

Inspection procedures to be performed after a hard landing incident.

5-38. SUDDEN STOPPAGE — POWER ON OR OFF

Inspection procedures following a sudden stoppage of the drive system.

5-39. AFTER OVERSPEED

Inspection procedures to follow after an overspeed incident.

5-40. AFTER OVERTORQUE

Inspection procedures and torque values following an overtorque incident.

5-41. AFTER COMPRESSOR STALL OR SURGE

Inspection procedures after engine compressor stall or surge events.

5-42. AFTER LIGHTNING STRIKES

Inspection procedures for electrical and structural components after a lightning strike.

5-43. AFTER ENGINE COMBINING GEARBOX CLUTCH NON-ENGAGEMENT, MISENGAGEMENT, OR IN-FLIGHT SLIPPAGE

Inspection procedures for engine combining gearbox clutch issues.