Textron Bell 206L3, Maintenance Manual

Page: 199 / 230

BHT-206L3-MM-1
5-00-00
25 FEB 2011 Rev. 16 Page 167 ECCN EAR99
NOTE
If tail rotor driveshaft failed as a result of torsional
overload, ALL hangers, driveshafts, adapters,
impeller, and disc couplings shall be considered
unserviceable and scrapped. Inspect hanger
attachment points for cracks and distortion. Ensure
airworthiness of tail rotor gearbox by conducting a
major overhaul.
If a tail rotor driveshaft has been damaged by main
rotor strike or damage other than torsional overload,
ALL bonded tail rotor driveshafts, plus the hanger
assemblies, adapter, and disc couplings fore and aft
of the damaged area shall be considered
unserviceable and scrapped. Inspect remaining
hanger assemblies, adapters and disc couplings
using magnetic particle or fluorescent penetrant
inspection, whichever is applicable for cracks and
distortion.
7. In addition ALL bonded tail rotor driveshaft shall be
considered unserviceable and scrapped, if during a sudden
stoppage inspection any of the following conditions which are
attributable to the sudden stoppage are noted:
a. Any impact damage to a tail rotor blade leading edge or
skin, or any tail rotor blade skin buckling or tears.
b. Any deformation of any coupling discs which results in
gaps between laminates greater than 0.015 inch (0.381 mm).
c. Structural failure or distortion of any coupling disc bolts.
d. Structural failure, or distortion exceeding the specified
limits of the tail rotor driveshaft steel or aluminum adapter.
8. Inspect tailboom area of tail rotor gearbox mounting studs
and dowel pins for cracks using a 10X magnifying glass or
fluorescent penetrant method of inspection.
9. Inspect the four tailboom attachment points for cracks,
distortion damage and security. Check torque on nuts of
tailboom attachment bolts.
CONDITIONAL INSPECTIONS
5-54. SUDDEN STOPPAGE/ACCELERATION (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER