(c)
The resistance measured between the ohmmeter leads must be 0.0025 ohm or less.
(d)
If the resistance is more than 0.0025 ohm, remove the fasteners and clean the bonding surfaces again. Do this procedure until the resistance indication is in the correct range.
(4)
Install the wire harness (4204KS) on the loop A fire-detector sensor (4001WD1).
(a)
Put the harness wire (55) on terminal C of the sensor (5) and attach it with nut (50).
(b)
TORQUE the nut (50) to between 20 and 25 lbf.in (0.22 and 0.28 m.daN).
(c)
Put the harness wire (60) on terminal A of the sensor (5) and attach it with the nut (45).
(d)
Put the lock washer (85), flat washer (70) and ground wire (80) on the ground stud (65). Put the ground stud through the sensor and engine bracket and attach it with the washer (70) and nut (45).
(e)
TORQUE the nuts (45) to between 25 and 30 lbf.in (0.28 and 0.33 m.daN).
(f)
Put the clamp (40) on the harness (4204KS) and attach it with the screws (35).
(g)
TORQUE the screws (35) to between 8 and 10 lbf.in (0.09 and 0.11 m.daN).
(h)
Lock the screws (35) with lockwire 0.032 in. (0.8 mm) dia
(Material No. CP8001) or lockwire 0.032 in. (0.8 mm) dia
(Material No. CP8002).
(5)
Install the wire harness (4205KS) on the loop B fire-detector sensor (4001WD2).
(a)
Put the harness wire (110) on terminal C of the sensor (115) and attach it with nut (50).
(b)
TORQUE the nut (50) to between 20 and 25 lbf.in (0.22 and 0.28 m.daN).
(c)
Put the harness wire (120) on terminal A of the sensor (115) and attach it with nut (45).
(d)
Put the lock washer (85), flat washer (70) and ground wire (80) on the ground stud (65). Put the ground stud through the sensor and engine bracket and attach it with the washer (70) and nut (45).
(e)
TORQUE the nuts (45) to between 25 and 30 lbf.in (0.28 and 0.33 m.daN).
(f)
Put the clamp (40) on the harness (4205KS) and attach it with the screws (35).
(g)
TORQUE the screws (35) to between 20 and 25 lbf.in (0.22 and 0.28 m.daN).
(h)
Lock the screws (35) with lockwire 0.032 in. (0.8 mm) dia (Material No. CP8001) or lockwire 0.032 in. (0.8 mm) dia (Material No. CP8002).
(6)
Connect the rail assembly (20) to the engine brackets, as follows:
(a)
Make sure that the fire detector rail assembly (20) is in the correct position on the engine.
(b)
Move the center mount clamps (15) in position on mounting bracket
(30) (10 locations).
(c) Turn the screw (10) to attach the clamp (15) to the bracket (30). Subtask 26-12-17-865-052
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 7WD1, 7WD2, 8WD1, 8WD2
Subtask 26-12-17-860-052
C. Do the EIS start procedure (upper ECAM DU only) (Ref. TASK 31-60-00-860-001).
Subtask 26-12-17-710-050
D. Do this test.
(1)
On the upper DU, make sure that the FIRE ENG1(2) LOOP A (B) FAULT message has gone out of view .
(2)
Do an operational test of the engine fire detection system (Ref. TASK 26-12-00-710-001).
5. Close-up
________ Subtask 26-12-17-860-053
A. Do the EIS stop procedure
(Ref. TASK 31-60-00-860-002).
Subtask 26-12-17-410-050
B. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the thrust reverser doors (Ref. TASK 78-36-00-410-040): FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR
Subtask 26-12-17-440-050
C. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041). Subtask 26-12-17-410-051
D. Close Access
(1)
Close the fan cowl doors (Ref. TASK 71-13-00-410-040):
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(2)
Remove the access platform(s).
(3) Remove the warning notice(s). Subtask 26-12-17-862-050
E. De-energize the ground service network (Ref. TASK 24-42-00-862-001). FIRE DETECTION UNIT (FDU) - ENGINE (2WD1,2WD2) - REMOVAL/INSTALLATION
_____________________________________________________________________ TASK 26-12-34-000-001 Removal of the Engine Fire-Detection Unit (FDU) (2WD1,2WD2)
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