aft until the latch disengages. d) Open the right access door. e) Engage the support rods for the APU access doors.
2) Look at the oil level in the sight gage. 3) If the oil level is below the ADD on the sight gage for the APU OFF, fill the APU oil.
WARNING: DO NOT REMOVE THE OIL FILL CAP WHEN THE APU IS IN
_______ OPERATION. IF THE OIL FILL CAP IS REMOVED WHEN THE APU OPERATES, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(c) ON AN OIL SIGHT GAGE WITH A FULL MARK FOR THE APU ON; use the sight gage when the APU operates to do a check of the oil level.
NOTE: You can only do a check of the APU oil level when
____ the engine operates if the sight gage has a mark for the APU ON.
1) Open the left APU access door, 315AL, and right APU access door, 316AR: a) Open the latches on the APU access doors. b) Open the left access door. c) Push the right access door up and pull the spring latch
aft until the latch disengages. d) Open the right access door.
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757 MAINTENANCE MANUAL
e) Engage the support rods for the APU access doors. 2) Look at the oil level in the sight gage. 3) If the oil level is below the FULL mark for the APU ON, do
these steps: a) Use the APU Operation procedure to do the APU shutdown (AMM 49-11-00/201). b) Fill the APU oil.
F. Fill the APU Oil (Gravity Fill Method) (Fig. 301).
S 883-025
(1)
If possible, stop the APU for four hours to let the temperature decrease before you fill the oil.
S 863-002
(2)
Make sure the APU control switch is in OFF position and attach a DO-NOT-OPERATE tag.
S 863-003
(3)
Open this circuit breaker on the overhead panel P11 and attach a DO-NOT-CLOSE tag:
(a) 11B34, APU MN BAT CONT or APU ALTN CONT
S 863-004
(4) Open this circuit breaker on the E6 rack in the aft equipment center and attach a DO-NOT-CLOSE tag:
(a) APU CONT
S 013-005
(5)
If it is necessary, open the left APU access door, 315AL, and right APU access door, 316AR:
(a)
Open the latches on the APU access doors.
(b)
Open the left access door.
(c)
Push the right access door up and pull the spring latch aft until the latch disengages.
(d)
Open the right access door.
(e)
Engage the support rods for the APU access doors.
(6)
Clean the oil fill cap before it is removed.
S 433-019
S 333-026
WARNING: DO NOT REMOVE THE OIL FILL CAP IF THE APU IS WARM, AND THE OIL
_______ LEVEL IS AT OR ABOVE THE FULL MARK. THE HOT OIL CAN CAUSE INJURY.
(7) Remove the oil fill cap.
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S 613-007
WARNING:_______DO NOT KEEP THE OIL ON YOUR SKIN. IF YOU DO NOT CLEAN THE OIL OFF YOUR SKIN, THE OIL CAN CAUSE INJURY.
CAUTION: DO NOT MIX TWO TYPES OF OIL (MIL-PRF-7808 AND MIL-PRF-23699)
_______ WHEN YOU ADD THE OIL IN THE APU. IT IS PERMITTED TO MIX DIFFERENT BRANDS OF OIL WITH THE SAME TYPE OF OIL WHEN YOU ADD THE OIL IN THE APU. A MIXTURE OF THE TWO TYPES OF OIL IN THE APU CAN CAUSE DAMAGE TO THE APU.
IF YOU DO NOT CLEAN THE OIL OFF, THE OIL CAN CAUSE A STAIN ON YOUR CLOTHES AND PAINT CAN BECOME SOFT.
DO NOT PUT TOO MUCH OIL IN THE RESERVOIR OR YOU CAN CAUSE THE APU TO HAVE A SHUTDOWN FROM LOW OIL PRESSURE.
(8)
Slowly add oil until the oil flows into the scupper drain.
S 413-008
(9)
Install the oil fill cap.
(a) Make sure the oil fill cap is tightened.
G. Fill APU Oil (Pressure Fill Method) (Fig. 301)
S 863-020
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