R (2) Remove the access platform(s).
R (3) Remove the warning notice(s). R Subtask 26-12-16-862-050 R D. De-energize the ground service network
R (Ref. TASK 24-42-00-862-001).
DETECTOR - FIRE, CORE (LOOP A AND B) (4001WD1,4001WD2) - REMOVAL/INSTALLATION
_____________________________________________________________________________
TASK 26-12-17-000-041
Removal of the Core Fire Detectors (4001WD1,4001WD2)
WARNING : BE CAREFUL WHEN YOU WORK ON THE ENGINE COMPONENTS IMMEDIATELY AFTER
_______ THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS CAN STAY HOT FOR UP TO ONE HOUR.
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 phillips head screwdriver
No specific warning notice
No specific access platform 1 m (3 ft. 3 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-42-00-861-001 Energize the Ground Service Network from the External
Power 71-13-00-010-040 Opening of the Fan Cowl Doors 78-30-00-481-041 Make the Thrust Reverser Unserviceable for
Maintenance 78-36-00-010-040 Opening of the Thrust Reverser Doors 26-12-17-991-300 Fig. 401 26-12-17-991-301 Fig. 402
3. Job Set-up
__________
Subtask 26-12-17-861-050
A. Energize the ground service network (Ref. TASK 24-42-00-861-001).
Subtask 26-12-17-941-050
B. Safety Precautions
(1)
On the center pedestal, on the ENG panel 115VU:
(a) Put a warning notice to tell persons not to start the engine 1(2).
(2)
Make sure that the engine 1(2) has been shutdown for at least 5 minutes.
(3)
On the overhead maintenance panel 50VU:
(a)
Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b)
Install a warning notice to tell persons not to energize the FADEC 1(2).
Subtask 26-12-17-865-050
C. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU ENGINE/2/FIRE DET/LOOP B 8WD2 A07 49VU ENGINE/1/FIRE DET/LOOP A 7WD1 A06 121VU ENGINE/ENG2/FIRE DET/LOOP A 7WD2 Q39 121VU ENGINE/ENG1/FIRE DET/LOOP B 8WD1 Q38
Subtask 26-12-17-010-050
D. Get Access
(1) Open the fan cowl doors (Ref. TASK 71-13-00-010-040):
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(2) Put the access platform in position. Subtask 26-12-17-040-050
E. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
Subtask 26-12-17-010-051
F. Open the thrust reverser doors (Ref. TASK 78-36-00-010-040):
FOR 1000EM1
451AL, 452AR
FOR 1000EM2
461AL, 462AR
4. Procedure
_________
(Ref. Fig. 401/TASK 26-12-17-991-300, 402/TASK 26-12-17-991-301) Subtask 26-12-17-020-050
A. Removal of the Core Fire Detectors CAUTION : REMOVE THE FIRE DETECTORS AND THE RAIL AS ONE ASSEMBLY. THE
_______ FIRE DETECTOR SENSOR ELEMENTS CAN BE DAMAGED IF NOT SUPPORTED BY THE RAIL.
(1)
Disconnect the rail assembly from the engine brackets, as follows:
(a) Turn the screw (10) on the center mount clamp (15), then move the clamps (15) out of the brackets (30) (10 locations). Use a phillips head screwdriver.
(2)
Remove the wire harness (FIN 4204KS) from the Loop A fire-detector sensor (4001WD1): (Ref. Fig. 401/TASK 26-12-17-991-300)
(a)
Remove the nut (50) from terminal C of the fire detector sensor (5). Remove the wire (55) from the terminal.
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