Textron Bell 212, Maintenance Manual

Page: 250 / 269

BHT-212-MM-1
5-00-00
26 JUN 2013 Rev. 14 Page 215 Export Classification C, ECCN EAR99
Chapter 65 e. Remove and inspect tail rotor driveshaft.
f. Remove input and output drive quill from intermediate
gearbox and inspect gear teeth on pinion and gear for damage
with a 10X magnifying glass. if no evidence of scoring or
scuffing is found, and there is no mechanical damage that would
render gearbox unserviceable, reassemble and return to
service. If gear teeth are scuffed or scored, or gearbox has
sustained other damage, gearbox shall be replaced with a like,
serviceable item and the following
step g and step h
accomplished.
g. Remove tail rotor gearbox from helicopter and remove
input quill. Inspect gear teeth on pinion and gear for damage
with a 10X magnifying glass. If no evidence of scoring or
scuffing is found, and there is no other damage that would
render gearbox unserviceable, it may be reassembled and
reinstalled for continued use. If gear teeth are scored or scuffed,
or there is other damage that would render gearbox
unserviceable, replace gearbox with a like, serviceable item.
h. Remove tail rotor drive quill from transmission and
inspect gear teeth for damage with a 10X magnifying glass. If
there is no indication of scoring or scuffing, and there is no other
damage that would render transmission unserviceable, it is
suitable for continued use. If gear teeth are scored or scuffed, or
there is other damage and that would render transmission
unserviceable, replace transmission with a like, serviceable item
and comply with
step j .
i. Install serviceable tail rotor driveshaft if transmission is
not to be replaced.
j. If transmission is to be replaced, the following
components shall also be replaced ( step (1) through step (3)
and procedures outlines in step (4) through step (8) performed).
(1) Tail rotor bearing hanger assemblies.
(2) Tail rotor driveshafts.
BHT-212-CR&O (3) Tail rotor hub and blade assembly. Perform an
overhaul evaluation. Make an entry in component record to
show reason for removal was compressor stall.
CONDITIONAL INSPECTIONS
5-54. AFTER ENGINE COMPRESSOR STALL OR SURGE (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER