Textron Bell 206L3, Maintenance Manual

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BHT-206L3-MM-1
5-00-00
7 JUN 2013 Rev. 21 Page 191 Export Classification C, ECCN EAR99
d. Inspect nodal beam, 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 the airframe.
BHT-206L-CR&O (2) If indications of arcing or burning are present,
overhaul parts.
e. Remove input 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. State lightning strike as reason for removal.
BHT-206L-CR&O (2) If no indications of damage are found and bearings
rotate smoothly, reassemble gearbox and return it to limited
service. After 5 hours, remove chip detector and inspect for
chips. If no chip indications are found, return gearbox to full
service. If chip indications are found, return gearbox for
overhaul. State lightning strike as reason for removal.
f. Inspect main driveshaft male and female couplings for
evidence of arcing or burning on all gear teeth. If no evidence of
arcing is found, assemble driveshaft and return to service. Parts
that exhibit arcing or burning shall be scrapped. On 206L3+
IGW Upgrade helicopters, inspect KAflex main driveshaft for
evidence of arcing or burning. If no evidence of arcing or
burning is found, return to service. KAflex main driveshafts that
exhibit arcing or burning shall be scrapped.
(1) If indications of arcing or burning are found on the
main driveshaft or on any component of the tail rotor driveshaft
installation, return freewheel assembly for overhaul. State
lightning strike as reason for removal.
CONDITIONAL INSPECTIONS
5-58. LIGHTNING STRIKE (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER