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SEE B
SEE C
SEE A
MAIN GEARBOX
MAGNETIC CHIP
BUSHING DETECTOR
FWD SEE D
A
MAIN GEARBOX (REF)
MAGNETIC CHIP
DETECTOR
OIL TANK
FWD SEE D
B
LUBRICATION AND
PACKING MAGNETIC CHIP SCAVENGE OIL PUMP
DETECTORS MAGNETIC
SEE DFWDCHIP DETECTOR
HOUSING C
PORT (REF)
PACKING
MAGNETIC CHIP
DETECTOR PROBE
D
Main Gearbox Magnetic Chip Detector Locations Figure 602
B43964
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 046-012-N00
WARNING: DO THE DEACTIVATION PROCEDURE TO PREVENT THE OPERATION OF THE
_______ THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(2)
Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).
S 016-013-N00
(3)
Open the core cowl panels (AMM 71-11-06/201).
S 016-014-N00
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
(4)
Open the thrust reversers (AMM 78-31-00/201).
S 216-003-N00
(5)
Examine the main gearbox for signs of oil leakage.
(a)
If you find oil leakage around the drain plugs at the 4 or
6 o'clock positions, do the steps that follow:
1) Put the container below the drain plug.
WARNING:_______DO NOT LET HOT OIL TOUCH YOU. LET 5 MINUTES GO BY AFTER AN ENGINE SHUTDOWN TO LET THE OIL SYSTEM PRESSURE GO TO ZERO. IF YOU OPEN THE OIL SYSTEM WHEN IT HAS PRESSURE, A SPRAY OF HOT OIL CAN BURN YOU.
WARNING: DO NOT TOUCH THE OIL SYSTEM PARTS IF THE ENGINE IS
_______ HOT. THESE PARTS STAY HOTTER THAN OTHER ENGINE PARTS AFTER AN ENGINE SHUTDOWN. IF YOU TOUCH AN OIL SYSTEM PART WHEN THE ENGINE IS HOT, IT CAN BURN YOU.
WARNING: DO NOT LET THE OIL TOUCH YOUR SKIN FOR A LONG TIME.
_______ YOU CAN ABSORB POISONOUS MATERIALS FROM THE OIL THROUGH YOUR SKIN.
CAUTION: IMMEDIATELY CLEAN ALL OIL THAT FALLS ON THE ENGINE
_______ PARTS. OIL CAN CAUSE DAMAGE TO PAINT AND SOME RUBBER PARTS.
CAUTION: HOLD THE BUSHING WITH THE WRENCH WHEN YOU REMOVE THE
_______ DRAIN PLUG. IF YOU DO NOT HOLD THE BUSHING WITH THE WRENCH, THE BUSHING WILL LOOSEN.
2) Remove the drain plug and discard the packing.
3) Permit the oil to fully drain.
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CAUTION:_______INSTALL THE PACKING CORRECTLY. IF YOU DO NOT INSTALL IT CORRECTLY, THE ENGINE OIL CAN DECREASE TOO MUCH DURING THE OPERATION OF THE ENGINE. THIS CAN CAUSE POSSIBLE ENGINE FAILURE.
4) Install a new packing, lubricated with engine oil, on the drain plug. 5) Put the plug, with the threads lubricated with engine oil, into the bushing and tighten it as follows:
CAUTION: HOLD THE BUSHING WITH THE WRENCH WHEN YOU INSTALL
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