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R 2_ if nothing is found:
R - continue the troubleshooting.
R (b) Do a continuity and insulation check of this wiring
R 1_ if damage is found:
R - replace or repair the above harness.
R 2_ if nothing is found:
R - continue the troubleshooting.
R (c) Do a pin retention check on connectors sockets.
R 1_ if damage is found:
R - replace or repair the above harness.
R 2_ if nothing is found:
R - continue the troubleshooting.
R (d) Do a check for absence of corrosion or contamination. Pay
R particular attention to engine to pylon connector.
R 1_ If damage is found:
R - repair the A/C electrical wiring or replace the J4 harness
R as required
R 2_ If nothing is found:
R - replace the CTL UNIT-THROTTLE, ENG1 (8KS1) (Ref. AMM TASK
R 76-11-19-000-042) and (Ref. AMM TASK 76-11-19-400-042).
R a_ if the fault repeats on subsequent flights:
R - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001)
R and (Ref. AMM TASK 73-21-60-400-001).
R (2) If the test gives the maintenance message TLA SNSR, J4, ECU:
R - Disconnect the J4 harness from the ECU (4000KS) receptacle and
R visually examine the ECU receptacle and the J4 harness connector
R for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-002).
R (a) If damage on a connector is found:
R - replace or repair as required.
R (b) If nothing is found:
R - do an electrical resistance test through the J4 harness
R between:
R . pins 17 and 30 (30 to 40 ohms)
R . pins 5 and 15 (15 to 25 ohms)
R . pins 29 and 28 (15 to 25 ohms)
R . pins 17 and 16 (> 10 megohms)
R . pins 5 and 16 (> 10 megohms)
R . pins 29 and 16 (> 10 megohms)
R . pin 17 and the ground (> 10 megohms)
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. pin 5 and the ground (> 10 megohms) . pin 29 and the ground (> 10 megohms).
1 If the resistance values are in the specified limits:
_
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
2 If the resistance values are out of the specified limits:
_ R - disconnect the connector DD at the throttle control unit R (8KS1) and do the resistance check at the throttle control
unit connector between:
. pins A, B (30 to 40 ohms)
. pins C, D (15 to 25 ohms)
. pins E, F (15 to 25 ohms)
.pin A and the ground (> 10 megohms)
.pin B and the ground (> 10 megohms)
.pin C and the ground (> 10 megohms)
a If the resistance values are out of the specified limits:
_
- replace the CTL UNIT-THROTTLE, ENG1 (8KS1) (Ref. AMM TASK 76-11-19-000-042) and (Ref. AMM TASK 76-11-19-400-042).
b If the resistance values are in the specified limits:
_
- replace the harness J4 (Ref. AMM TASK 71-51-43-000-047) and (Ref. AMM TASK 71-51-43-400-047).
B. Do the test given in Para. 3.A.
(1) No additionnal maintenance action is required if the fault is not confirmed.
(2) Repeat the fault isolation procedure if the fault continues.
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TASK 76-11-00-810-808
Loss of the TLA Resolver Signal through the Channel B on Engine 2
1. Possible Causes
_______________
- A/C electrical wiring
- CTL UNIT-THROTTLE, ENG2 (8KS2)
- ECU (4000KS)
- harness J4
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 71-51-43-000-047 Removal of the ECU (Channel B) Harness (4212KS)
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