(1)
Remove the forward fairing (AMM 54-62-04/401).
S 863-003
(2)
Make sure that the thrust reverser is in the closed position before servicing the power unit.
S 213-004
(3)
Do a check of the fluid level in the fluid level sight plug (2) to determine if the fluid level is low.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. THRUST REVERSERS WITH THE COWL OPENING ú
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POWER UNIT ú
ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 301Jun 18/00
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747-400 MAINTENANCE MANUAL
SEE A
1. FILLER PLUG
2. FLUID LEVEL SIGHT PLUG
DRIP TRAY
FWD
A
Thrust Reverser Cowl Opening Power Unit Servicing
Figure 301
E42897
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. THRUST REVERSERS WITH THE COWL OPENING ú
12-12-04
POWER UNIT ú
ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 302Jun 18/00
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747-400 MAINTENANCE MANUAL
F. Fill the Power Unit with Hydraulic Fluid
S 013-005
(1)
Remove the filler plug (1).
S 613-006
(2)
While you look into the fluid level sight plug (2), add the hydraulic fluid and fill the tank to the applicable hot or cold full mark.
NOTE: The power unit is hot if it has been cycled before servicing.
____
(a) If you are not certain whether the power unit is hot or cold, do the steps that follow: 1) Fill to the cold mark. 2) Install the filler plug (1). 3) Open and close the thrust reverser. 4) Fill to the hot mark.
S 423-007
(3)
Lubricate a new "O" ring seal and install the seal on the filler plug (1).
S 433-008
(4)
Install the filler plug (1) and tighten to 100-130 pound-inches.
G. Put the Airplane Back to Its Usual Condition
S 413-009
(1) Install the forward fairing (AMM 54-62-04/401).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. THRUST REVERSERS WITH THE COWL OPENING ú
12-12-04
POWER UNIT ú
ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 303Jun 18/00
A
747-400
MAINTENANCE MANUAL
AUXILIARY POWER UNIT - SERVICING (OIL REPLENISHING)
___________________________________________________
1. General
_______
A. This procedure has the task to fill the APU oil tank. The load gearbox is the APU oil tank. The oil filler cap is located on the top right side of the APU oil tank. A chain is attached from the inner APU oil tank to the oil filler cap to keep the oil filler cap with the APU. You can get access to the oil filler cap through the two APU access doors.
B. There are two sight glasses for the oil level on the right side of the APU oil tank. The top sight glass is the oil full indicator. The bottom sight glass is the oil add indicator.
C. The total capacity of the APU oil tank is 4.81 U.S. gallons (18.2 liters). The oil quantity that can be used is 4.2 U.S. gallons (15.9 liters).
D. If it is necessary to change the APU oil to a different type or brand name of oil, do this task: Flush the APU Oil Tank (AMM 12-22-02/301).
E. Use only these types and brands of oil:
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