with the two washers (5) and two nuts (6). 4) Tighten the two nuts (6) to 32-36 inch-pounds (3.6-4.1 newton-meters).
(g)
Remove the container.
(h)
Before you install the oil filler cap (1) on the APU oil tank, put the chain in the inner APU oil tank until you cannot see the chain.
(i)
Install the oil filler cap (1) on the APU oil tank.
(j)
Turn the handle on the oil filler cap (1) clockwise and push it down to lock the cap into position.
S 023-020
(2) If it is necessary to remove the APU with no oil in the APU oil tank, do this task: Auxiliary Power Unit Removal (AMM 49-11-01/401).
S 173-010
CAUTION: DO NOT CHANGE THE OIL TO AEROSHELL/ROYCO TURBINE OIL 560 OR
_______ MOBIL JET OIL 254 UNLESS YOU HAVE ONE OF THESE CONDITIONS:
-
A NEW APU IS INSTALLED WITH NO OIL IN THE APU OIL TANK
-
A SERVICEABLE APU IS INSTALLED WITH NO OIL IN THE APU OIL
TANK SINCE ITS LAST OVERHAUL. INTERNAL DAMAGE TO THE APU ENGINE CAN OCCUR.
(3)
If the APU oil in the APU oil tank is changed to a different type or brand name of oil, do this task: Flush the APU Oil Tank (AMM 12-22-02/301).
S 613-022
(4)
If the APU oil in the APU oil tank is filled with the same type and brand name of oil, do this task: Fill the APU Oil Tank (AMM 12-22-02/301).
TASK 12-22-02-603-052
3. Flush the APU Oil Tank
______________________
A. References
(1) AMM 49-11-00/201, Auxiliary Power Unit
B. Access
(1)
Location Zones
310 Fuselage - Station 2360 to Station 2792
(2)
Access Panels
317AL APU Access Door - Left
318AR APU Access Door - Right
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A
747-400
MAINTENANCE MANUAL
C. Procedure
S 173-022
(1) Do these steps to flush the oil from the APU oil tank:
(a) Do this task: Fill the APU Oil Tank (AMM 12-22-02/301).
NOTE: You use the different type or brand name of oil when you
____ fill the APU oil tank.
(b)
Do this task: APU Starting and Operation (AMM 49-11-00/201).
(c)
During the APU operation, make sure the APU operates for five minutes and there is no sign of oil leakage.
(d)
Do this task: APU Usual Shutdown (AMM 49-11-00/201).
(e)
Do this task: Drain the APU Oil (AMM 12-22-02/301).
(f)
Do this task: Fill the APU Oil Tank (AMM 12-22-02/301).
NOTE: You use the different type or brand name of oil when you
____ fill the APU oil tank.
(g) Attach a service tag to the APU to show the oil brand name and oil type in the APU oil tank.
TASK 12-22-02-613-044
4. Fill the APU Oil Tank (Fig. 301)
_____________________
A. Consumable Materials
(1) D00418 Oil - Aircraft Turbine Engine
B. Access
(1)
Location Zones
221 Control Cabin - Left
222 Control Cabin - Right
310 Fuselage - Station 2360 to Station 2792
(2)
Access Panels
317AL APU Access Door - Left
318AR APU Access Door - Right
C. Prepare to Fill the APU Oil Tank
S 863-045
(1)
Make sure the APU control switch on the P5 overhead panel is OFF and attach a DO-NOT-OPERATE tag.
S 863-046
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6-2 Main Power Distribution Panel
1) 6K18, APU ALTN CONT
(b)
P83 Aft APU Equipment Control and Circuit Breaker Panel 1) APU PRIME CONT
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