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

BHT-412-MM-2
5-00-00
26 FEB 2013 Rev. 16 Page 173
Export Classification C, ECCN EAR99
SPECIAL INSPECTIONS
5-33. EACH 3000 HOURS OF TRANSMISSION (412-040-002) OPERATION
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
DATE: __________________W.O. _____________________
FACILITY: __________________________________________
HELICOPTER S/N: ___________________________________
REGISTRY NO.: _____________________________________
TOTAL TIME:_______________________________________
SIGNATURE:________________________________________
NOTE
Accomplish each 3000 hours of transmission
412-040-002 operation on helicopters S/N 33001
through 33213 and S/N 36001 through 36019 not
modified by 412-570-001-103 or BHT-412-SI-74
(412SP to 412HP Upgrade).
TRANSMISSION (412-040-002)
BHT-412-CR&O 1. Disassemble transmission sufficiently to remove main input
driven gear quill.
2. Remove gear support case and debris collector to gain
access to spiral bevel gear retaining bolts.
a. Using torque wrench, torque check each of the 32 bevel
gear retaining bolts for minimum torque of 300 inch-pounds
(33.89 Nm).
b. If torque value of any one retaining bolt is less than
300 inch-pounds (33.89 Nm), remove bevel gear and inspect
mating surfaces of gear and shaft for fretting damage.