Failure of the Starter Shutoff Valve on Engine 1

TASK 77-00-00-810-888-A
Failure of the Starter Shutoff Valve on Engine 1

1. Possible Causes

starter shutoff valve (SAV)
starter
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 73-21-50-400-008	Installation of the J9 Harness
AMM 73-21-50-400-009	Installation of the J10 Harness
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)
AMM 80-11-10-000-001	Removal of the Pneumatic Starter
AMM 80-11-10-400-001	Installation of the Pneumatic Starter
AMM 80-11-20-000-001	Removal of the Starter Shutoff Valve
AMM 80-11-20-400-001	Installation of the Starter Shutoff Valve

3. Fault Confirmation
Subtask 77-00-00-710-213-A ** ON A/C NOT FOR ALL

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

4. Fault Isolation
Subtask 77-00-00-810-161-A ** ON A/C NOT FOR ALL

A. If the fault symptom is identified by the upper ECAM warning START AIR, SAV and the test of the FADEC 1A and 1B gives no CFDS maintenance message:
(1) If, since the last engine shut down, there has been icing conditions, do the actions that follow:

NOTE: It is possible that the starter air valve P/N 3290064-17 or 3290064-20 (single actuator valves) is frozen, specially during the first start of the day and thus causes the triggering of the E/W "ENG 1 START VALVE FAULT - START VALVE NOT OPEN".

(a) Open access door on the fan cowl : 438CR and 437BL.

CAUTION: FULL OPENING OF THE SAV CAN CAUSE DAMAGE TO THE SAV DIAPHRAGMS WHEN NO AIR PRESSURE IS IN THE CIRCUIT. IT IS THUS RECOMMENDED TO ACTUATE THE SAV FLAPPER NO MORE THAN 30 DEG IN ORDER TO CHECK ITS FREE OPENING/CLOSING.

(b) Actuate the SAV flapper.

Push the wrench button and then turn the manual handle clockwise by 30 degrees maximum (to prevent damage to the internal SAV diaphragms) to put the valve in a not fully open position.

CAUTION: DURING THE HEATING PHASE, DO NOT DIRECT THE HEAT FLOW TO THE SAV SOLENOID, J9/J10 CONNECTORS AND HARNESSES.

Blow hot air at 30 DEG.C (86 DEG.F) in SAV air duct through the SAV access door.

(d) Close the starter air valve.
(e) Close access door on the fan cowl : 438CR and 449CR.
(2) Do a check for open or short to ground at pins J9/11, 12 or J10/11, 12 of the harness J9 or J10 between the ECU (4000KS) and the stater shutoff valve.
(a) If the wiring is not correct:

repair the above wiring.

(b) If the wiring is correct:

disconnect the harness J9 or J10 from the ECU (4000KS) and do a check of the ECU resistance cable between:
. pins 11 and 12 (10 to 60 ohms).

1 If the resistance values are in the specified limits:

do a check for low starter air duct pressure.

a If the starter air duct pressure is in the specified limits (11 PSI < P < 60 PSI):

replace the starter shutoff valve (SAV) AMM 80-11-20-000-001 AMM 80-11-20-400-001
replace the starter AMM 80-11-10-000-001 AMM 80-11-10-400-001.

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

remove the harness J9 or J10 from SAV and do a check of the SAV resistance between:
. pins 1 and 2 (10 to 60 ohms).

a If the resistance values are in the specified limits:

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

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

replace the starter shutoff valve (SAV) AMM 80-11-20-000-001 AMM 80-11-20-400-001.

c If the fault continues:

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

Subtask 77-00-00-810-161-B ** ON A/C NOT FOR ALL

A. If the fault symptom is identified by the upper ECAM warning START AIR, SAV and the test of the FADEC 1A and 1B gives no CFDS maintenance message:
(1) Do a check for open or short to ground at pins J9/11, 12 or J10/11, 12 of the harness J9 or J10 between the ECU (4000KS) and the stater shutoff valve.
(a) If the wiring is not correct:

repair the above wiring.