PS14 Sensor Electrical Failure Channel B

TASK 77-00-00-810-936-A
PS14 Sensor Electrical Failure Channel B

1. Possible Causes

[4000KS]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 71-00-00-810-834-A	General Troubleshooting Guidelines for Additional Troubleshooting Information
TSM TASK 71-00-00-810-835-A	Component and Harness Intermittent Troubleshooting Procedure for Guidance Troubleshooting Intermittent Faults
AMM 73-21-00-710-806	Test No.7 - EEC Operation Test (Self Test)
AMM 73-21-01-000-801	Removal of the Electronic Engine Control (EEC)
AMM 73-21-01-400-801	Installation of the Electronic Engine Control (EEC)
EEC Wiring Harnesses and PS14 Sense Line

3. Fault Confirmation
Subtask 77-00-00-710-299-A ** ON A/C NOT FOR ALL

A. Do the EEC system interactive test to confirm this fault. Refer to FADEC self test AMM 73-21-00-710-806.

NOTE: The Electronic Engine Control (EEC) has detected the circuit for the fan exit pressure (PS14) sensor is out of range or rate in channel B. The PS14 sensor senses the air pressure at the fan exit through an external PS14 sense line attached to the EEC. The PS14 sensor is internally wired to channel B of the EEC. The EEC is attached to the fan case located at the 2 o'clock position.

Refer to the general troubleshooting guidelines for additional troubleshooting information (Ref. TSM TASK 71-00-00-810-834).
Refer to the component and harness intermittent troubleshooting procedure for guidance troubleshooting intermittent faults (Ref. TSM TASK 71-00-00-810-835).

(1) If the fault comes back, go to the Para. Fault Isolation.
(2) If the fault does not come back, return the engine to service and monitor for intermittent faults (Ref. TSM TASK 71-00-00-810-835).
(3) If the fault continues to be intermittent, go to the Para. Fault Isolation.

4. Fault Isolation

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.

WARNING: REFER TO THE MSDS FOR ALL MATERIAL USED AND THE MANUFACTURER'S SAFETY INSTRUCTIONS FOR ALL EQUIPMENT USED. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.

CAUTION: MAKE SURE YOU REMOVE ELECTRICAL POWER FROM THE EEC BEFORE YOU REMOVE THE ELECTRICAL CONNECTORS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EEC CAN OCCUR.

Subtask 77-00-00-810-262-A ** ON A/C NOT FOR ALL

A. If there is confirmation of the fault:
(1) Replace [4000KS] AMM 73-21-01-000-801 and AMM 73-21-01-400-801.
(a) Do the test given in Para. 3.

5. Close-up
Subtask 77-00-00-860-112-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.

[Rev.8 from Aug 2018] 2026.04.04 04:37:51 UTC