Service difficulty report · Pressure Sensor · Boeing 777224

Difficulty date
August 17, 2025
Submitted
August 20, 2025
Operation
Air carrier
Aircraft
N78008
Make and model
Boeing 777224
Aircraft serial
29478
Aircraft time
121,475 hours, 12,576 cycles
Part
Pressure Sensor
Part number
11514742
Condition
Faulted
Location
Rt Engine
Stage of operation
CL
How discovered
O
Nature of condition
N
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

BLEED OFF ENG R EICAS ADVISORY RIGHT ENGINE BLEED VALVE CLOSED FOR SYSTEM FAULT OR SWITCH OFF, AND THE ENGINE IS NOT SHUTDOWN. FIM TASK REF : FIM TASK REFERENCE NOT FOUND CMC MSG# 3610470 AIR SUPPLY & CABIN PRES SURE CONTROLLER (R) IP SENSOR FAIL 36-10470 FIM TASK 36-21 TASK 804 CARRIED OUT. SHOP FAULTS 56 EA, HPSOV FAIL OPEN 36-10370 FIM TASK 36-11 TASK 802. BOTH MSG POINT TOWARDS FAULTY IP SENSOR. WIRING CHECKS CARRIED OUT I.A.W WDM 36-21-12. VOLTAGE 15.25 STABLE AND GOOD GND WIRE SHAKE TEST PASS. REMOVAL/ INSTALLATION OF IP SENSOR M36212 IAW AMM 36-21-03. AIR SUPPLY CONTROL SYSTEM MAT TEST PASS. HPSOV ACTIVATED IAW 36-11-07-860-012-001. PART POWER ENG RUN CARRIED OUT I.A.W 71-00-00. ENG AIR SUPPLY OP TEST PASS I.A.W 36-10-00. ... ALL PARAMETERS NORMAL.