(2)
Make sure that the electrical connectors are clean and in the correct condition.
(3)
Make sure that there is a good electrical bond between the sensors (45), the clamps (40), the rail assembly (20), and the engine bracket.
(4)
Cleaning with trichloroethane
WARNING : TRICHLOROETHANE IS A HAZARDOUS MATERIAL THAT CAN CAUSE
_______ INJURY OR ILLNESS IF NOT CORRECTLY USED. BEFORE YOU USE THIS PRODUCT, READ THE APPLICABLE MANUFACTURER'S "MATERIAL DATA SAFETY SHEET" AND OBEY THE SAFETY AND HEALTH PRECAUTIONS.
(a)
Make all bonding surfaces clean with a cloth dampened with 1,1,1 trichloroethylene (Material No. CP1008).
(b)
Dry the bonding surfaces with a clean cloth before the solvent evaporates.
(5)
Put the clamps (40) on the sensors (45) and attach them with the bolts (15) and nuts (5).
(6)
TORQUE the nuts (5) to between 20 and 25 lbf.in (0.22 and 0.28 m.daN).
(7)
Do an electrical resistance check of the Loop A and Loop B fire detectors, as follows:
(a)
Put one lead of the low voltage ohmmeter on the fire detector sensors (45).
(b)
Put the other lead of the ohmmeter on the engine bracket.
(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.
(8)
Put the fire detector rail assembly (20) in position on the engine.
(9)
Move the center mount clamps (25) in position on the mounting brackets (10) (8 locations). Turn the screw (30) to attach the clamp to the bracket.
(10)
TORQUE the screw (30) to between 20 and 25 lbf.in (0.22 and 0.28 m.daN).
(11)
Connect the electrical connector 4000WD1-A to the loop A fire detector sensor (45). Tighten the connector with your hand.
(12)
Connect the electrical connector 4000WD2-A to the loop B fire detector sensor (45). Tighten the connector with your hand.
Subtask 26-12-15-865-052
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 7WD1, 7WD2, 8WD1, 8WD2
Subtask 26-12-15-860-057
C. Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
(Ref. TASK 31-60-00-860-001).
Subtask 26-12-15-710-050
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 26-12-15-860-058
A. Do the EIS stop procedure
(Ref. TASK 31-60-00-860-002).
Subtask 26-12-15-410-050
B. Close access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the fan cowl doors (Ref. TASK 71-13-00-410-040):
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(3)
Remove the warning notice(s).
(4) Remove the access platform(s). Subtask 26-12-15-862-051
C. De-energize the ground service network (Ref. TASK 24-42-00-862-001).
R TASK 26-12-15-000-026
R Removal of the Fan Fire Detectors (4000WD1,4000WD2) from the Rail Assembly
R CAUTION : USE CARE WHEN YOU REMOVE THE FIRE DETECTOR SENSORS FROM THE RAIL_______
R ASSEMBLY. THE FIRE DETECTOR SENSOR TUBE CAN CRACK AND CAUSE SERIOUS
R DAMAGE TO THE UNIT.
R NOTE : This procedure can be done with the rail assembly installed on the____
R engine, or with the rail assembly removed from the engine. If this
R procedure is done with the rail assembly removed from the engine, go to
R step 4.A.(1)(c).
R 1. Reason for the Job__________________
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