SusiAir PILATUS PORTER PC6, Maintenance Program

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Form ASI-PC6 Lightning Strike Inspection
Reissued: 2
Revision: 1
Date: July 2020 Page 1 of 2
MAINTENANCE PROGRAM
PILATUS PORTER PC6
Ref. AMM Pilatus Porter PC6 Chapter 05-51-12, EMM PT6A-27 Chapter 72-00-00
PILATUS PC6 - LIGHTNING STRIKE INSPECTION SHEET
Aircraft
Registration
: ……………. Job Number : …………….
Aircraft S/N : …………….
NO. DESCRIPTION TASK NO. MECH. ENG. RII
AIRFRAME
1 Find the point at which the lightning hit the aircraft. N/A
2 Examine the propeller for sign of sign of arc damage.
N/A
3
Look for secondary damage such as burns or pits near the area where
the lightning hit.
N/A
4
Examine the aircraft for signs of discharge damage. N/A
5
Examine the static dischargers and nav/position lights. N/A
6
Examine the airframe and engine bonding leads between the area
where the lightning hit and the discharge point.
N/A
7
If the lightning hit the aircraft on a control surface examine the
hinge and bearings on the control surface.
N/A
8
Operationally test the flight control and make sure that the movement
is full and smooth.
N/A
9
Operationally test all electrical and avionic equipment. N/A
10 Perform a swing check on the main and standby compass system.
N/A
11 Examine the engine.
72-00-00 N/A
ENGINE
1
If signs of arcing are found on the propeller blades, the propeller
shaft and flange must be checked for magnetism. Check for
magnetism using one of the following methods:
Check propeller shaft, especially flange, using a magnetometer to
make sure residual magnetism is within ± 3 gauss or 3 oersted of
2.38 A/cm. If reading is above limits, replace power section.
N/A
2
If propeller shaft or flange is magnetized:
a. Ship power section to an approved overhaul facility for Light
Overhaul. Indicate Lightning Strike.
N/A
b. On the gas generator, check for evidence of electrical
discharge (localized burn marks) at the C-flange or at the
compressor turbine. Evidence of discharge requires sending the
complete engine to an approved overhaul facility.
N/A
c. Inspect the main oil filter (Ref. 79-20-02). If metallic debris is
found, refer to FAULT ISOLATION.
79-20-02
N/A
3
If the propeller shaft or flange is not magnetized:
a. Remove and inspect RGB chip detector, oil strainer, and main
oil filter (Ref. 72-10-00, 79-20-02). If metallic debris is found, refer
to FAULT ISOLATION.
72-10-00,
79-20-02
N/A
b. Turn the propeller by hand and listen for unusual noises
from the reduction gearbox or PT bearings (Ref. Para. A.(4)).
For unusual noises, slow propeller acceleration on start or abrupt
deceleration on shutdown, send power section to an approved
overhaul facility for Light Overhaul and indicate lightning strike.
N/A