S 212-004
(3)
Examine the Zone 2 (Fig. 201) surface for signs of a lightning strike.
(a)
Make sure you look in the areas where one surface stops and the other surface starts.
(b)
Examine the metal structure for holes or pits and look for burned or discolored skin or rivets.
(c)
Examine external surfaces of composite honeycomb sandwich components. 1) Look for discolored paint, burned, punctured, or
delaminated skin plies.
S 342-005
CAUTION:_______MAKE SURE TO SEAL OR REPAIR ALL DAMAGE. FAILURE TO SEAL OR REPAIR DAMAGE CAN CAUSE MORE INTERNAL DAMAGE BECAUSE MOISTURE CAN GET IN.
(4)
Repair or seal the damaged areas.
S 332-007
(5)
Examine the composite structure for damage you cannot see. Use instrumental NDI methods or tap test.
NOTE: Damage you cannot see, for example delamination, can
____ extend to the areas around the damaged area you can see. Delamination can be found by instrumental NDI procedures or by a tap test. For a tap test, use a solid metal disk and lightly hit the area adjacent to the damage area lightly. If the area is delaminated, you will hear a different sound than the sound of a solid bonded area. Refer to the Nondestructive Test Manual D6-37239.
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737-300/400/500MAINTENANCE MANUAL
S 332-006
CAUTION:_______MAKE SURE TO SEAL OR REPAIR ALL DAMAGE. FAILURE TO SEAL OR REPAIR DAMAGE CAN CAUSE MORE INTERNAL DAMAGE BECAUSE MOISTURE CAN GET IN.
(6)
Repair or seal the damaged areas.
S 712-008
(7)
Make sure the navigation lamps, rotary lights, and the landing lights operate.
S 212-009
(8)
Do the tests of the flight controls that follow:
(a)
If the rudder shows signs of a lightning strike, examine the surface hinges, bearings, and bondings for signs of damage.
(b)
If the elevators show signs of a lightning strike, examine the surface hinges, bearings, and bondings for signs of damage.
(c)
If the ailerons show signs of a lightning strike, examine the surface hinges, bearings, and bondings for signs of damage.
(d)
If no damage is found, do a basic check of the flight controls as follows:
NOTE: If the flight controls operate correctly after you do
____ these steps, no more inspections are necessary.
1) Move the rudder, control wheel and control column in both directions. 2) Make sure there is full travel and they move freely.
NOTE: Hold the nose wheel during the rudder check to
____ prevent nose wheel movement. You can hold the nose wheel if you put in the steering lockout pin or remove the torsion link pin.
S 712-010
(9)
Do a functional test of the rudder system if it did not operate correctly during the tests of the flight controls steps above (AMM 27-21-00/501).
S 712-011
(10)
Do a functional test of the elevator system if it did not operate correctly in the tests of the flight controls steps above (AMM 27-31-00/501).
S 712-012
(11)
Do a functional test of the ailerons if they did not operate correctly in the tests the flight controls steps above (AMM 27-11-00/501).
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737-300/400/500MAINTENANCE MANUAL
S 212-013
(12) If the wingtips show signs of a lightning strike, examine the wingtips carefully.
(a) Also look carefully at the fuel vent outlet and surge tanks for signs of damage.
S 712-035
(13)
Do an operational check of the digital flight control system, (AMM 22-11-00/501).
S 712-036
(14)
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