Loss of the PS13 Sensor Signal on Engine 1

TASK 73-20-00-810-901-A
Loss of the PS13 Sensor Signal on Engine 1

1. Possible Causes

PS13 line
ECU [4000KS]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 72-23-00-280-001	Inspection/Check of the PS13 Line
AMM 72-23-00-280-004	Inspection/Check of the PS13 Line
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)

3. Fault Confirmation
Subtask 73-20-00-710-202-A ** ON A/C NOT FOR ALL

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

Subtask 73-20-00-710-202-B ** ON A/C NOT FOR ALL

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

4. Fault Isolation
Subtask 73-20-00-810-165-A ** ON A/C NOT FOR ALL

A. The PS13 signal is part of the PMUX option only used for Engine Condition Monitoring.

NOTE: If the engine is not equipped in a PMUX configuration, you have two options:

replace the engine Identification Connector by a connector configured as Non PMUX to definitively avoid further generation of this fault message,
ignore this fault message.

NOTE: The fault message is generated if the PS13 sensor signal is invalid or out of range.

(1) If the maintenance message PS13 SENS LINE, ECU is not confirmed:
(a) No maintenance is required.
(2) If the maintenance message PS13 SENS LINE, ECU is confirmed or is not confirmed but is repetitive:

do a check for leak or blocked PS13 line or loose fittings AMM 72-23-00-280-004.

(a) If nothing is found or if the fault continues:

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

Subtask 73-20-00-810-165-B ** ON A/C NOT FOR ALL

A. The PS13 signal is part of the PMUX option only used for Engine Condition Monitoring.

NOTE: If the engine is not equipped in a PMUX configuration, you have two options:

replace the engine Identification Connector by a connector configured as Non PMUX to definitively avoid further generation of this fault message,
ignore this fault message.

NOTE: The fault message is generated if the PS13 sensor signal is invalid or out of range.

(1) If the maintenance message ECU, PS13 SNSR LINE or ECU, PS13 SNSR LINE* is not confirmed:
(a) No maintenance is required.
(2) If the maintenance message ECU, PS13 SNSR LINE or ECU, PS13 SNSR LINE* is not confirmed but is repetitive:

do a check for leak or blocked PS13 line or loose fittings AMM 72-23-00-280-004.

(a) If nothing is found or if the fault continues:

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

Subtask 73-20-00-810-165-C ** ON A/C NOT FOR ALL

A. The PS13 signal is part of the PMUX option only used for Engine Condition Monitoring.

NOTE: If the engine is not equipped in a PMUX configuration, you have two options:

replace the engine Identification Connector by a connector configured as Non PMUX to definitively avoid further generation of this fault message,
ignore this fault message.

NOTE: The fault message is generated if the PS13 sensor signal is invalid or out of range.

do a check for leak or blocked PS13 line or loose fittings AMM 72-23-00-280-001.

(a) If nothing is found or if the fault continues:

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

Subtask 73-20-00-710-310-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 04:35:26 UTC