Textron Bell 412 - 5-39. AFTER OVERSPEED

BHT-412-MM-2
5-00-00
26 FEB 2013 Rev. 16 Page 203
Export Classification C, ECCN EAR99
CONDITIONAL INSPECTIONS
5-39. AFTER OVERSPEED
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
DATE: __________________W.O. _____________________
FACILITY: __________________________________________
HELICOPTER S/N: ___________________________________
REGISTRY NO.: _____________________________________
TOTAL TIME:_______________________________________
SIGNATURE:________________________________________
NOTE
Accomplish after overspeed.
Components removed from a helicopter for
evaluation following an overspeed shall be
evaluated as an interrelated group. Removal
records accompanying each component shall cross
reference part and serial numbers of other drive
system components removed for evaluation.
AFTER OVERSPEED
Overspeed is defined as any incident in which 110% main
rotor rpm is exceeded and/or engine overspeed limits in
engine manual are exceeded.
1. Perform overspeed inspection as follows:
Chapter 62 a. Main rotor hub assembly:
(1) Remove main rotor hub. Remove main rotor
blades.
BHT-412-CR&O (2) Perform an overhaul conditional evaluation
inspection. Make an entry in component record to show reason
for removal was overspeed.
BHT-412-CR&O (3) Inspect main rotor blade retention bolts.