W DOC AIRBUS | AMM A320F

Installation of the Forward Fire/Overheat Detector with the Rail

TASK 26-12-17-400-808-A
Installation of the Forward Fire/Overheat Detector with the Rail

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.
WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 450
ZONE: 460
FIN: 4002WD1 ** ON A/C NOT FOR ALL
FIN: 4002WD2 ** ON A/C NOT FOR ALL
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific
AR
COVER - PROTECTION
No specific
Torque wrench: range to between 35 and 30 lbf.in (0.40 and 0.34 m.daN ) T
No specific
Torque wrench: range to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.PU1-0001)
lint-free cotton cloth
(Material No.PU2-0001)
alcohol, isopropyl
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
450
ENG 1 THRUST REVERSER & EXHAUST SECTION
460
ENG 2 THRUST REVERSER & EXHAUST SECTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 24-42-00-861-001-A
Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A
De-energize the Ground Service Network Supplied from the External Power
TASK 26-12-00-710-001-A
Operational Check of Loop/Squib
TASK 26-12-17-400-802-A
Installation of the Forward Fire/Overheat Detector
TASK 26-12-61-400-802-A
Installation of the Loop-A Fire Electrical Harness and the Loop-A Fire Detector Cables
TASK 26-12-62-400-802-A
Installation of the Loop-B Fire Harness
TASK 31-60-00-860-001-A
EIS Start Procedure
TASK 31-60-00-860-002-A
EIS Stop Procedure
TASK 71-00-00-720-811-A
Test No. 3A - Idle Power Test
TASK 71-00-00-860-833-A
Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A
Closing of the Fan Cowl Doors
TASK 73-21-00-710-806-A
Test No.7 - EEC Operation Test (Self Test)
TASK 78-30-00-040-805-A
Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A
Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A
Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A
Closing of the Thrust Reverser Cowl-Doors
F Forward Fire/Overheat Detector with the Rail
3. Job Set-up
Subtask 26-12-17-861-074-A ** ON A/C NOT FOR ALL
A. Make sure that the ground service network is energized (Ref. AMM TASK 24-42-00-861-001).
Subtask 26-12-17-941-070-A ** ON A/C NOT FOR ALL
B. Safety Precautions
   (1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
Subtask 26-12-17-865-085-A ** ON A/C NOT FOR ALL
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VUENGINE/1/FIRE DET/LOOP A7WD1A06
121VUENGINE/ENG1/FIRE DET/LOOP B8WD1Q38
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VUENGINE/2/FIRE DET/LOOP B8WD2A07
121VUENGINE/ENG2/FIRE DET/LOOP A7WD2Q39
Subtask 26-12-17-010-100-A ** ON A/C NOT FOR ALL
D. Get Access
   (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
Subtask 26-12-17-040-075-A ** ON A/C NOT FOR ALL
E. Deactivation of the Thrust Reverser System for Ground Maintenance
WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
   (1) Make sure that you did the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).
Subtask 26-12-17-010-101-A ** ON A/C NOT FOR ALL
F. Get Access
   (1) Make sure that the thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR
   (2) Make sure that the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE is in position.
4. Procedure
Subtask 26-12-17-420-068-A ** ON A/C NOT FOR ALL
A. Installation of the Forward Fire/Overheat Detector with the Rail
CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.
CAUTION: DO NOT USE ELECTRICAL OR PNEUMATIC TOOLS TO LOOSEN OR TIGHTEN THE QUARTER-TURN FASTENER ON THE FIRE DETECTOR CLAMP. ONLY USE A MANUAL SCREWDRIVER. ELECTRICAL OR PNEUMATIC TOOLS WILL CAUSE THE FASTENER TO TURN TOO MUCH AND POSSIBLY TO BREAK.
   (1) Remove all the necessary COVER - PROTECTION to prevent damage to the engine.
   (2) Make sure that the parts retained from the removed component are clean and in the correct condition.
   (3) Install the two hinged clamps (10) on the forward fireloop assembly (3) with the two bolts (9).
   (4) TORQUE the bolts (9) to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN ) T.
   (5) Install the forward fireloop assembly (3):
CAUTION: DO NOT TWIST OR MAKE KINKS IN THE SENSOR ELEMENT. MAKE SURE THE ELEMENT IS FREE OF TENSION. THIS WILL HELP PREVENT DAMAGE TO THE PART.
     (a) Fully clean the mating surfaces of the forward fireloop assembly (3) and the mounting brackets with a clean lint-free cotton cloth (Material No.PU1-0001) and PU2-0001alcohol, isopropyl.
     (b) Remove the unwanted isopropyl alcohol with a clean lint-free cotton cloth (Material No.PU1-0001) before it dries.
     (c) Carefully put the forward fireloop assembly (3) on the engine.
     (d) Attach the right end of the forward fireloop assembly (3) to the engine mounting bracket with the two bolts (1), two screws (5) and four washers (2) and (4).
     (e) Do not torque the bolts (1) and screws (5) at this time.
     (f) Attach the left end of the forward fireloop assembly (3) to the engine mounting bracket with the two bolts (8), screws (5) and three washers (2) and (4).
     (g) Do not torque the bolts (8) and screw (5) at this time.
     (h) Do not torque the upper LH and lower LH forward fireloop assembly (3) screws at this time.
NOTE: You will install the other screw and washer when you install the loop-B fire harness in step 4.A.(6).
     (i) Measure the resistance between the forward fireloop assembly (3) elements at the two ends and the engine mounting brackets.
     (j) Make sure that it is less than 0.0025 ohms.
     (k) If the resistance is more than 0.0025 ohms, remove the hardware and do step 4.A.(5)(a) thru step 4.A.(5)(k) again.
     (l) Put the 12 clamp assemblies (6) on the forward fireloop assembly (3).
     (m) Attach the forward fireloop assembly (3) and the two clamp assemblies (6) to the bracket assembly that is forward of the right engine mounting bracket with the two bolts (7) and two washers (2).
     (n) Do not torque the bolt (7) at this time.
     (o) Attach the forward fireloop assembly (3) and the two clamp assemblies (6) to the bracket assemblies with the two bolts (7) and two washers (2).
     (p) Do not torque the bolts (7) at this time.
     (q) Attach the forward fireloop assembly (3) and the clamp assembly (6) to the engine bracket with the bolt (7) and washer (2).
     (r) Do not torque the bolt (7) at this time.
     (s) Attach the forward fireloop assembly (3) and the three clamp assemblies (6) to the bracket assemblies with the three bolts (7) and three washers (2).
     (t) Do not torque the bolts (7) at this time.
     (u) Attach the forward fireloop assembly (3) and the two clamp assemblies (6) to the engine brackets with the two bolts (7) and two washers (2).
     (v) Do not torque the bolts (7) at this time.
     (w) Attach the forward fireloop assembly (3) and the clamp assembly (6) to the fire detection drains tab with the bolt (7) and washer (2).
     (x) Do not torque the bolt (7) at this time.
     (y) Attach the forward fireloop assembly (3) and the clamp assembly (6) to the engine bracket with the bolt (7) and washer (2).
     (z) Do not torque the bolt (7) at this time.
     (aa) Adjust the forward fireloop assembly (3) to keep the preload to a minimum:
       1 Loosen the rail attachment bolts on the left end of the forward fireloop assembly (3).
       2 For configuration 1, loosen the rail attachment bolts on the right end of the forward fireloop assembly (3).
       3 For configuration 2, loosen the rail attachment nuts on the right end of the forward fireloop assembly (3).
       4 Turn the forward fireloop assembly (3) until preload is at a minimum.
       5 TORQUE the rail attachment bolts on the left end of the forward fireloop assembly (3) to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN ) T.
       6 For configuration 1, TORQUE the rail attachment bolts on the right end of the forward fireloop assembly (3) to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN ) T.
       7 For configuration 2, TORQUE the rail attachment nuts on the right end of the forward fireloop assembly (3) to between 35 and 30 lbf.in (0.40 and 0.34 m.daN ) T.
     (ab) If necessary, adjust the forward fireloop assembly (3) elements on the forward fireloop assembly (3) fireloop rail so there is 0.4 in. (10.160 mm) minimum clearance with the case drain line. Make sure that there are no kinks in the forward fireloop assembly (3) elements (Ref. AMM TASK 26-12-17-400-802).
     (ac) TORQUE the bolts (1), (7) and (8), screws (5) and upper LH, lower LH and lower RH forward fireloop assembly (3) screws to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN ) T.
   (6) Connect the loop-A fire detector electrical rail assembly to the forward fireloop assembly (3) (Ref. AMM TASK 26-12-61-400-802).
   (7) Connect the loop-B fire harness to the forward fireloop assembly (3) (Ref. AMM TASK 26-12-62-400-802).
Subtask 26-12-17-865-086-A ** ON A/C NOT FOR ALL
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VUENGINE/1/FIRE DET/LOOP A7WD1A06
121VUENGINE/ENG1/FIRE DET/LOOP B8WD1Q38
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VUENGINE/2/FIRE DET/LOOP B8WD2A07
121VUENGINE/ENG2/FIRE DET/LOOP A7WD2Q39
Subtask 26-12-17-860-083-A ** ON A/C NOT FOR ALL
C. Do the EIS start procedure (upper ECAM DU only) (Ref. AMM TASK 31-60-00-860-001).
Subtask 26-12-17-710-063-A ** ON A/C NOT FOR ALL
D. Do this test:
   (1) On the upper ECAM DU, make sure that the FIRE ENG1(2) LOOP A (B) FAULT message is out of view.
   (2) Do an operational check of loop/squib (Ref. AMM TASK 26-12-00-710-001).
Subtask 26-12-17-720-056-A ** ON A/C NOT FOR ALL
E. Tests
   (1) If you disconnected an oil or fuel tube or manifold, do test No. 3 (Ref. AMM TASK 71-00-00-720-811), if not included in the test that follows.
   (2) If you disconnected an electrical harness connector, do the FADEC system static test (Ref. AMM TASK 73-21-00-710-806).
Subtask 26-12-17-860-084-A ** ON A/C NOT FOR ALL
F. Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
5. Close-up
Subtask 26-12-17-410-074-A ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR
Subtask 26-12-17-440-059-A ** ON A/C NOT FOR ALL
B. Do the reactivation of the thrust reverser after ground maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 26-12-17-410-075-A ** ON A/C NOT FOR ALL
C. Close Access
   (1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
   (2) Remove the WARNING NOTICE(S).
   (3) Remove the access platform(s).
Subtask 26-12-17-862-065-A ** ON A/C NOT FOR ALL
D. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
[Rev.10 from 2021] 2026.03.31 23:43:11 UTC
"Aviabrain" 2025