Textron Bell 206A Series, Maintenance Manual

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BHT-206A/B-SERIES-MM-1
5-00-00
Page 170
Rev. 14 30 APR 2013 Export Classification C, ECCN EAR99
BHT-206B3-CR&O 2. Overhaul the following components:
a. Tail rotor gearbox assembly
b. Freewheel assembly
c. Main driveshaft assembly
d. Tail rotor pitch change mechanism
BHT-206B3-CR&O 3. Inspect all tail rotor driveshaft, impeller, steel and aluminum
adapters, flexible coupling discs, and hangers using magnetic
particle or fluorescent penetrant methods.
4. Visually inspect shafts for evidence of twisting. Check for
out of round and Total Indicated Runout (TIR) exceeding
specified limits. Inspect bonds between tail rotor driveshaft and
bonded adapter for integrity. If any defect is detected, scrap all
bonded tail rotor driveshafts.
5. Inspect tail rotor hanger support at tailboom and fuselage
attachment points for cracks.
6. Inspect tail rotor hanger supports for cracks and distortion.
NOTE
If tail rotor driveshaft has failed as a result of
torsional overload, all hangers, driveshafts, adapters,
impellers, 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 hanger
assemblies, adapters, and disc couplings fore and aft
of 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.
CONDITIONAL INSPECTIONS
5-54. SUDDEN STOPPAGE/ACCELERATION — TAIL ROTOR (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER