Textron Bell 412 - 5-42. AFTER LIGHTNING STRIKES

BHT-412-MM-2
5-00-00
30 AUG 2013 Rev. 19 Page 219
Export Classification C, ECCN EAR99
CONDITIONAL INSPECTIONS
5-42. AFTER LIGHTNING STRIKES
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
DATE: __________________W.O. _____________________
FACILITY: __________________________________________
HELICOPTER S/N: ___________________________________
REGISTRY NO.: _____________________________________
TOTAL TIME:_______________________________________
SIGNATURE:________________________________________
NOTE
Accomplish after lightning strikes.
In all instances below, if significant damage has
been found in any area, inspection shall be
expanded in those areas until it extends beyond the
zone of damage. Any damage found anywhere on
helicopter shall be recorded in detail and copies of
these records shall be provided along with any
component returned for overhaul to assist
overhauling facility in evaluating component.
AFTER LIGHTNING STRIKES
When helicopter is suspected of receiving a lightning strike,
accomplish the following:
1. Visually inspect all external surfaces of helicopter with
particular attention to main rotor hub and blades, transmission
and mast assembly, tail rotor blades and hub, tail rotor gearbox,
and vertical fin. Check electrical instruments and systems.
Verify magnetic compass accuracy.
2. If visual indications of damage are present, proceed as
follows: