BHT-206A/B-SERIES-MM-1
5-00-00
Page 194 Rev. 14 30 APR 2013
Export Classification C, ECCN EAR99
(1) If indications of arcing, burning, or roughness of
bearing are present, remove transmission and mast assembly,
and freewheel unit, and return for overhaul.
c. Remove transmission top case and inspect for entry
and exit of lightning strike. Special attention should be given to
planetary pinion and sun gear, ring gear, spiral bevel gear, and
quill pinion. Rotate all bearings for smooth rotation and damage.
(1) If indications of arcing, burning, or roughness of
bearing are present, remove transmission, mast assembly, and
freewheel unit, and return for overhaul.
BHT-206A/B-M&O,
BHT-206B3-CR&O,
BHT-206A/B/L-Series-
CR&O
(2) If no indications of arcing are found, reassemble
transmission and mast assembly, and return to limited service.
(3) After 5 hours, remove the chip detectors and filter,
and inspect for chips.
(a) If no chip indications are found, return
transmission to full service.
(b) If chip indications are found, remove
transmission, mast assembly, and freewheel unit and return for
overhaul.
d. Inspect pylon and transmission mount fittings and
engine mounts.
(1) Visually inspect exterior surfaces for evidence of
arcing or burning. Special attention should be given to contact
surfaces of transmission and engine to their mounting systems
and of mounting systems to airframe.
(2) If indications of arcing or burning are present,
overhaul parts.
e. Remove output quill assembly from tail rotor gearbox.
Visually inspect gear teeth for signs of electrical arcing or
burning. Rotate tail rotor mast to check for smooth rotation of
bearings.
5-58. LIGHTNING STRIKE (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER