Textron Bell 412, Руководство по обслуживанию

Страница: 251 / 288

BHT-412-MM-2
5-00-00
Export Classification C, ECCN EAR99
(2) Disc pack couplings - Any deformation that results
in gaps between laminates that are greater than 0.015 inch
(0.381 mm), scrap the disk pack coupling. (Not applicable to
412 and 412SP).
(3) Disc pack coupling bolts - Distortion or cracks in
any bolt, scrap bolt. (Not applicable to 412 and 412SP).
(4) Tail rotor drive adapters - Distortion beyond the
limits specific in Chapter 65, scrap adapter.
(5) If no damage that would render the tail rotor
driveshaft unserviceable is noted, it may be returned to service.
d. Inspect tail rotor drive system structural attachment as
follows:
(1) Inspect the tail rotor gearbox, intermediate
gearbox attachment for cracks, sheared rivets or damage.
(2) Inspect tail rotor driveshaft support structure for
cracks, shear rivets or damage.
e. Transmission sump assembly:
NOTE
If transmission assembly has already been removed
for overhaul omit step e. If no evidence of damage
was found in step b and step c above, omit step (1)
through step (3) below.
(1) If damage was found on driveshaft hanger
assemblies, tail rotor driveshaft, intermediate gearbox
assembly or tail rotor gearbox assembly, remove tail rotor
output quill assembly from transmission sump assembly.
(2) Inspect output quill pinion for unusual load
patterns on both sides of teeth. Inspect sump case internally for
gear contact damage. If no damage is found, install quill
assembly. Transmission assembly may be retained in service.
CONDITIONAL INSPECTIONS
5-38. SUDDEN STOPPAGE — POWER ON OR OFF (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
01 JUN 2018 Rev. 26 Page 202A