BHT-206L4-MM-1
5-00-00
25 FEB 2011 Rev. 13 Page 123
ECCN EAR99
5-42. 3000 HOURS OF COMPONENT OPERATION
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
DATE: __________________W.O. _____________________
FACILITY: __________________________________________
HELICOPTER S/N: ___________________________________
REGISTRY NO.: _____________________________________
TOTAL TIME:_______________________________________
SIGNATURE:________________________________________
BHT-206L-CR&O TAIL ROTOR GEARBOX
This inspection may be accomplished concurrently
with the duplex bearing (206-040-410-005, -101, or
subsequent) replacement at 3000 hours.
1. Perform backlash check of the gearbox prior to
disassembly. Backlash shall be 0.003 to 0.011 inch (0.08 to
0.28 mm) and shall not vary more than 0.002 inch (0.05 mm)
when measured at three different locations. Record backlash for
later reference.
If this inspection is being done in conjunction with
replacement of bearing (206-040-410-005, -101, or
subsequent), removal of input pinion assembly is not
required. Remove output cap, output shaft, and
duplex bearing (206-040-410-005, -101, or
subsequent) after complying with step 1.
2. Remove input pinion and bearings. Remove output cap
and oil level sight glass.
3. Inspect spiral bevel gear and input pinion gear for
corrosion and chipped, broken, or worn gear teeth. Inspect gear
wear patterns.
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