Failure of the Starter Shutoff Valve Switch on Engine 1

TASK 80-11-00-810-801-A
Failure of the Starter Shutoff Valve Switch on Engine 1

1. Possible Causes

starter shutoff valve
harness J9
harness J10
ECU [4000KS]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 73-21-50-000-008	Removal of the J9 Harness
AMM 73-21-50-000-009	Removal of the J10 Harness
AMM 73-21-50-000-042	Removal of the HJ9 Harness for SAC Engines
AMM 73-21-50-000-043	Removal of the HJ10 Harness for SAC Engines
AMM 73-21-50-210-001	Visual Inspection of the Wiring Harness
AMM 73-21-50-400-008	Installation of the J9 Harness
AMM 73-21-50-400-009	Installation of the J10 Harness
AMM 73-21-50-400-042	Installation of the HJ9 Harness for SAC Engines
AMM 73-21-50-400-043	Installation of the HJ10 Harness for SAC Engines
AMM 73-21-60-000-001	Removal of the Electronic Control Unit (ECU)
AMM 73-21-60-400-001	Installation of the Electronic Control Unit (ECU)
AMM 73-29-00-710-040	Operational Test of the FADEC on the ground (with Engine Motoring)
ASM 743101
AMM 80-11-20-000-001	Removal of the Starter Shutoff Valve
AMM 80-11-20-000-003	Removal of the Starter Shutoff Valve
AMM 80-11-20-400-001	Installation of the Starter Shutoff Valve
AMM 80-11-20-400-003	Installation of the Starter Shutoff Valve

3. Fault Confirmation
Subtask 80-11-00-710-050-A ** ON A/C NOT FOR ALL

A. Do the operational test of the FADEC 1A on the ground (with engine non motoring) AMM 73-29-00-710-040.

4. Fault Isolation
Subtask 80-11-00-810-050-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message SAV, J9, J10:

do a check for open or short to ground of the harnesses J9 and J10 between the ECU (4000KS) and the starter shutoff valve ASM 743101.

(1) If the wiring is not correct:

repair the above wiring.

(2) If the wiring is correct:

disconnect the harnesses J9 and J10 from the starter shutoff valve
install a jumper wire between the pins 3 and 4 on the harnesses J9 and J10
disconnect the harnesses J9 and J10 from the ECU (4000KS) and do a resistance check of each cable between:
. pins 9 and 10 (< 5 ohms)
. pins 9 and 3 (> 10 megohms)
. pin 9 and the ground (> 10 megohms).

(a) If the resistance values are in the specified limits:

replace the starter shutoff valve AMM 80-11-20-000-001 and AMM 80-11-20-400-001.

(b) If the resistance values are out of the specified limits:

replace the defective harness J9 AMM 73-21-50-000-008 and AMM 73-21-50-400-008 or
replace the defective harness J10 AMM 73-21-50-000-009 and AMM 73-21-50-400-009.

(3) If the fault continues:

replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.

Subtask 80-11-00-810-050-B ** ON A/C NOT FOR ALL

A. This failure message is generated if channel A and B switches of the starter shutoff valve disagree.
(1) If the failure message SAV (SW) J9/J10, ECU* is not confirmed:
(a) No maintenance action is required.
(2) If the failure message SAV (SW) J9/J10, ECU* is not confirmed but is repetitive:

replace the starter shutoff valve AMM 80-11-20-000-001 and AMM 80-11-20-400-001.

(a) If the failure continues during the subsequent flights:

replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.

(b) If the failure continues during the subsequent flights:

replace the harness J9 (channel A) AMM 73-21-50-000-008 and AMM 73-21-50-400-008.
replace the harness J10 (channel B) AMM 73-21-50-000-009 and AMM 73-21-50-400-009.

(3) If the failure message SAV (SW) J9/J10, ECU* is confirmed:

disconnect the harnesses J9 (channel A) and J10 (channel B) from the starter shutoff valve.

(a) Visually examine the receptacles and the connectors for damaged pins or contamination AMM 73-21-50-210-001.
1 If damage is found:

repair or replace as required.

2 If no damage is found:

do an electrical resistance test through the starter shutoff valve for both channels between:
. pin 1 and pin 2 (15 to 60 ohms)
. pin 1 and pin 5 (> 10 megohms)
. pin 1 and the ground (> 10 megohms).

a If the resistance values are out of the specified limits:

replace the starter shutoff valve AMM 80-11-20-000-003 and AMM 80-11-20-400-003.

b If the resistance values are in the specified limits:

connect the harnesses J9 (channel A) and J10 (channel B) to the starter shutoff valve and continue the trouble shooting procedure.

(b) Disconnect the harnesses J9 (channel A) and J10 (channel B) from the ECU (4000KS) and visually examine the receptacles and the connectors for damaged pins or contamination AMM 73-21-50-210-001.
1 If damage is found:

repair or replace as required.

2 If no damage is found:

do an electrical resistance test through each harness J9 and J10 between:
. pin 11 and pin 12 (15 to 60 ohms)
. pin 11 and pin 3 (>10 megohms)
. pin 11 and the ground (>10 megohms).

a If the resistance values are in the specified limits:

replace the ECU (4000KS) AMM 73-21-60-000-001 and AMM 73-21-60-400-001,
repeat the fault confirmation given in Para.3.A if the fault continues.

b If the resistance values are out of the specified limits:

replace the harness with the resistance values out of the limits:
. harness J9 AMM 73-21-50-000-008 and AMM 73-21-50-400-008,
. harness J10 AMM 73-21-50-000-009 and AMM 73-21-50-400-009.

Subtask 80-11-00-810-050-C ** ON A/C NOT FOR ALL

replace the starter shutoff valve AMM 80-11-20-000-003 and AMM 80-11-20-400-003.

(a) If the failure continues during the subsequent flights:

replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.

(b) If the failure continues during the subsequent flights:

replace the harness HJ9 (channel A) AMM 73-21-50-000-042 and AMM 73-21-50-400-042.
replace the harness HJ10 (channel B) AMM 73-21-50-000-043 and AMM 73-21-50-400-043.

(3) If the failure message SAV (SW) J9/J10, ECU* is confirmed:

disconnect the harnesses HJ9 (channel A) and HJ10 (channel B) from the starter shutoff valve.

(a) Visually examine the receptacles and the connectors for damaged pins or contamination AMM 73-21-50-210-001.
1 If damage is found:

repair or replace as required.

2 If no damage is found:

do an electrical resistance test through the starter shutoff valve for both channels between:
. pin 1 and pin 2 (15 to 60 ohms)
. pin 1 and pin 5 (> 10 megohms)
. pin 1 and the ground (> 10 megohms).

a If the resistance values are out of the specified limits:

replace the starter shutoff valve AMM 80-11-20-000-003 and AMM 80-11-20-400-003.

b If the resistance values are in the specified limits:

connect the harnesses HJ9 (channel A) and HJ10 (channel B) to the starter shutoff valve and continue the trouble shooting procedure.

(b) Disconnect the harnesses HJ9 (channel A) and HJ10 (channel B) from the ECU (4000KS) and visually examine the receptacles and the connectors for damaged pins or contamination AMM 73-21-50-210-001.
1 If damage is found:

repair or replace as required.

2 If no damage is found:

do an electrical resistance test through each harness HJ9 and HJ10 between:
. pin 11 and pin 12 (15 to 60 ohms)
. pin 11 and pin 3 (>10 megohms)
. pin 11 and the ground (>10 megohms).

a If the resistance values are in the specified limits:

replace the ECU (4000KS) AMM 73-21-60-000-001 and AMM 73-21-60-400-001,
repeat the fault confirmation given in Para.3.A if the fault continues.

b If the resistance values are out of the specified limits:

replace the harness with the resistance values out of the limits:
. harness HJ9 AMM 73-21-50-000-042 and AMM 73-21-50-400-042,
. harness HJ10 AMM 73-21-50-000-043 and AMM 73-21-50-400-043.

Subtask 80-11-00-710-051-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.A.
(1) No additional maintenance action is required if the fault is not confirmed.
(2) Repeat the fault isolation procedure if the fault continues.

[Rev.8 from Aug 2018] 2026.04.04 04:40:28 UTC