BELL HELICOPTER 222, Maintenance Manual

Page: 185 / 198

BHT-222/222B-MM-1
5-00-00
ECCN EAR99
(1) If indications of arcing, burning, or roughness of
the bearing are present, remove transmission and mast
assembly and return for overhaul. State lightning strike as
reason for removal.
(2) If no indications are found, assemble transmission
and mast assembly and return to limited service. After 5 hours,
remove the chip detectors and filter and inspect for chips. If no
indications are found, return transmission to full service. If
indications are found, remove transmission and mast assembly
and return it for overhaul. State lightning strike as reason for
removal. Clean all transmission oil lines. Replace oil cooler.
BHT-222-CR&O-3 c. 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.
(1) If evidence of arcing or burning is found or if
bearings do not rotate smoothly, remove gearbox and return it
for overhaul, stating lightning strike as reason for removal.
BHT-222-CR&O-3 (2) If no indications of damage are found, and if
bearings rotate smoothly, assemble gearbox and return it to
limited service. After 5 hours, remove chip detector and inspect
for chips. If no indications are found, return gearbox to full
service. If indications are found, return gearbox for overhaul,
stating lightning strike as reason for removal.
CONDITIONAL INSPECTIONS
5-56. LIGHTNING STRIKE (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
9 SEP 2011 Rev. 7 Page 167/168