Textron Bell 212, Maintenance Manual

Page: 246 / 269

BHT-212-MM-1
5-00-00
26 JUN 2013 Rev. 14 Page 211 Export Classification C, ECCN EAR99
l. Mast.
m. Transmission.
3. When overtorque exceeds 104% (108% for helicopters
with TB 212-91-138 incorporated), but does not exceed 112%
perform the following:
a. Perform thorough visual inspection of components
listed in step 2 .
b. Inspect main transmission chip detector(s).
c. Inspect main transmission internal filter or full flow
debris monitor (as applicable).
(1) If metal particles are found, indicating internal
failure, remove transmission for overhaul evaluation. Make an
entry in the component record explaining reason for removal
was overtorque. Remove all transmission system oil lines. Flush
and reinstall oil lines. Replace external oil filter element.
Remove and scrap oil cooler. Install new oil cooler.
(2) If chip detector(s) and internal filter or full flow
debris monitor (as applicable) appear normal and there is no
evidence of internal failure, return helicopter to service. Operate
normally for 5 hours and then check chip detector(s) and
internal filter or full flow debris monitor. If no metal particles are
found indicating internal failure, normal scheduled inspection
intervals may then be followed. If metal particles are present
prior to or at the 5 hour check, or if there is any evidence of
internal failure, remove transmission for overhaul evaluation.
Make an entry in the component record explaining reason for
removal was overtorque. Remove all transmission system oil
lines. Flush and reinstall oil lines. Replace external oil filter
element. Remove and scrap oil cooler. Install new oil cooler.
d. Remove fifth mount bolts and remove fifth mount.
Perform a thorough inspection of bolts and fifth mount support.
Check for bent bolts and bent fifth mount support. Check for bolt
hole alignment between transmission and fifth mount support.
CONDITIONAL INSPECTIONS
5-53. AFTER OVERTORQUE (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER