Textron Bell 212, Maintenance Manual

Page: 257 / 269

BHT-212-MM-1
5-00-00
Page 222
Rev. 14 26 JUN 2013 Export Classification C, ECCN EAR99
3. If no visual indications of damage are present, proceed as
follows:
Chapter 63 a. Remove and inspect all transmission chip detectors.
(1) If excessive debris is found on chip detectors,
remove transmission and mast assembly for overhaul.
Chapter 63
BHT-212-CR&O (2) If little or no debris is found, operate helicopter light
on skids for 1 hour. Reinspect chip detectors and remove and
inspect oil filter. Repeat these inspections after accumulating 5
flight hours but prior to 10 flight hours.
BHT-212-CR&O b. Remove main rotor hub grips.
(1) Visually inspect bearings for signs of electrical
arcing, burning, or delamination.
(2) Visually inspect pitch change links at drive
assembly connections for arcing burns.
(3) If indications of arcing or burning are present,
overhaul main rotor hub and drive assembly. Replace affected
pitch change link, including attaching hardware.
(4) If no indications are found, reassemble main rotor
hub.
4. Prior to first flight after a suspected or confirmed lightning
strike, verify proper function of all drive system component chip
detectors as follows:
a. Remove electrical connector from chip detector.
b. Remove chip detector and reinstall connector.
c. With helicopter electrical power on, bridge chip detector
gap with a clean conductive object (screwdriver).
d. Verify proper indication on the CHIP indicator panel and
caution panel. Verify illumination of MASTER CAUTION light.
e. Using a single strand of steel wool to bridge gap of one
chip detector, verify proper function of chip burn off system.
CONDITIONAL INSPECTIONS
5-55. AFTER LIGHTNING STRIKES (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER