CES
Oil Heating - Schematic
Figure 002
CES
7.
Operation Control and Indicating
________________________________ The oil heater is energized when the oil temperature in the reservoir decreases below 15.56 deg.C (60.00 deg.F). Then the temperature switch closes and 115 V AC supplied to the heater coil. This increases the APU oil temperature during cold soak conditions. When the oil temperature increases to above 48.89 deg.C (120.00 deg.F) the temperature switch opens and the oil heater is de-energized. The oil heater is de-energized when the APU MASTER SW p/bsw is in the ON position.
8.
BITE Test
_________ The oil heater is indirectly monitored in flight during cold soak condition via the oil temperature sensor and the FCU fuel-temperature sensor. An oil heater fault is detected when the fuel temperature is less than -10 deg.C (+14.00 deg.F) and the oil temperature is less than -20 deg.C (-4.00 deg.F).
R EFF : 001-049, 101-105, 107-107, 151-199, 49-96-00Page 4 201-210, Config-2 Aug 01/05
CES
HEATER - OIL APU - REMOVAL/INSTALLATION
_______________________________________
R **ON A/C 001-003, 051-099, 401-499,
TASK 49-96-51-000-001 Removal of the APU Oil Heater 2KT (GTCP 36-300) WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______
WHEN YOU DO THE MAINTENANCE TASK(S).
WARNING : USE THE CORRECT PERSONAL PROTECTION.
_______ OIL CAN HAVE ADDITIVE CALLED TRICRESYL PHOSPHATE IN IT. THIS CHEMICAL IS AN ASPHYXIANT, IT IS POISONOUS AND CAN BE ABSORBED THROUGH THE SKIN. USE CARE WHEN ENGINE OIL IS DRAINED. HOT OIL CAN POSSIBLY CAUSE BAD BURNS.
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
No specific plastic blanking caps
No specific plastic blanking plug
No specific access platform 2.5 m (8 ft. 2 in.)
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
No specific cable tie C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
49-90-00-600-001 Check Oil Level and Replenish (GTCP 36-300) 49-96-51-991-001 Fig. 401
3. Job Set-up
__________ Subtask 49-96-51-860-050
A. Put the warning notice in position on panel 25VU to tell persons not to start the APU.
Subtask 49-96-51-865-050
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/OIL/HTR/SPLY 1KT K41 121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
Subtask 49-96-51-010-050
C. Get Access
(1)
Put the access platform below the APU access doors 315AL and 316AR.
(2)
Open the APU access doors 315AL, 316AR.
4. Procedure
_________
(Ref. Fig. 401/TASK 49-96-51-991-001) Subtask 49-96-51-020-050
A. Removal of the APU Oil Heater
(1)
Drain the oil from the APU oil reservoir (Ref. TASK 49-90-00-600-001).
(2)
Disconnect the wiring harness connector (3) P28 from the APU oil heater (4).
(a)
Put plastic blanking caps on the disconnected electrical connectors.
(b)
Temporarily attach the wiring harness connector (3) P28 with a cable tie to a stowage position on the APU to prevent that oil can fall on the connector.
(3)
Remove the bolts (2) , the washers (1) and the APU oil heater (4).
(4)
Remove and discard the O-ring (5).
(5)
Put a plastic blanking plug on the APU oil heater-flange of the accessory drive gearbox (6).
Removal Installation of the APU Oil Heater
Figure 401/TASK 49-96-51-991-001
CES TASK 49-96-51-400-001
Installation of the APU Oil Heater 2KT (GTCP 36-300)
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