Bell 206L4 Maintenance Manual page 190

BHT-206L4-MM-1
5-52. SUDDEN STOPPAGE/ACCELERATION — TAIL ROTOR (CONT)
DATA REFERENCE
BHT-ALL-SPM
BHT-206L-CR&O
BHT-206L-CR&O
5-00-00
Page 154 Rev. 13 25 FEB 2011
CONDITIONAL INSPECTIONS
INSPECTION TASK DESCRIPTION
2. Overhaul the following components:
a. Tail rotor gearbox assembly.
b. Freewheel assembly.
c. Tail rotor pitch change mechanism.
3. Inspect all tail rotor driveshafts, impeller, steel and
aluminum adapters, flexible coupling discs, and hangers using
magnetic particle or fluorescent penetrant methods, whichever
is applicable.
4. Visually inspect shafts for evidence of twisting, and check
for out of round and Total Indicated Runout (TIR) exceeding
specified limits. Inspect the bonds between the tail rotor
driveshaft and bonded adapter for integrity. If any defect is
detected, scrap all bonded tail rotor driveshafts.
5. lnspect tail rotor hanger support at tailboom and fuselage
attachment points for cracks.
6. lnspect tail rotor hanger supports for cracks and distortion.
If tail rotor driveshaft failed as a result of torsional
overload, ALL hangers,
impeller, and disc couplings shall be considered
unserviceable and
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
unserviceable and scrapped. Inspect remaining
hanger assemblies, adapters, and disc couplings
using the magnetic particle or fluorescent penetrant
inspection, whichever is applicable, for cracks and
distortion.
NOTE
driveshafts, adapters,
scrapped. Inspect hanger
area shall be considered
INITIAL
MECH OTHER
ECCN EAR99