BHT-212-MM-1
5-00-00
Page 230 Rev. 14 26 JUN 2013
Export Classification C, ECCN EAR99
If a tail rotor driveshaft has failed or yielded, all tail
rotor driveshafts, hanger assemblies, intermediate
gearbox, and tail rotor gearbox shall be replaced,
and tail rotor drive quill in transmission shall be
removed and inspected for damage in accordance
with the compressor stall inspection (paragraph
5-46). If scoring, scuffing, or other damage or marks
indicate excessive load are found in intermediate
gearbox or tail rotor gearbox, but tail rotor driveshafts
are serviceable, gearbox(es) that are not serviceable
shall be replaced.
3. In-flight clutch slippage.
If clutch slippage is confirmed or suspected, proceed
as follows:
Pratt & Whitney
Canada PT6T-3/-3B
Maintenance Manual
a. Combining gearbox shall be removed and inspected in
accordance with Pratt & Whitney Canada PT6T-3/-3B
Maintenance Manual.
b. Inspect spiral bevel gear in accordance with
misengagement inspection step b, substep (2). If spiral bevel
gear is damaged, perform misengagement inspection given in
step c.
5-56. AFTER ENGINE COMBINING GEARBOX CLUTCH NONENGAGEMENT,
MISENGAGEMENT, OR IN-FLIGHT SLIPPAGE (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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