SDR 2001UALA01936

Service difficulty report · Switch · Boeing 777222

Difficulty date: September 1, 2001
Submitted: October 31, 2001
Operation: Air carrier
Aircraft: N771UA
Make and model: Boeing 777222
Aircraft serial: 26932
Aircraft time: 24,612 hours, 5,019 cycles
Engine: Pwa PW4077
Engine time: 20,880 hours, 4,115 cycles
System (JASC): 7334 · Fuel Pressure Sensor
Part: Switch
Part number: 42D395
Condition: Faulty
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

ENG FUEL FILTER R EICAS MSG DURING CLIMB. POWER (CLIMB) STABLE. ACFT ATTITUDE 8 DEGREES NOSE-UP. RTF. 2 FAULT MESSAGES: 73-60912 SWITCH POSITION SIGNAL FROM FUEL PUMP FILTER DIFF PRESS SW (R ENG) CHANNEL A AND B DO NOT AGREE AND 73-60922 FUEL PUMP FILTER DIFF PRESS SWITCH (R ENG) SIGNAL IS OUT OF RANGE. REPLACED FILTER, NO CONTAMINANTS FOUND, POINTING TO A WARNING SYSTEM PROBLEM. REPLACED DIFFERENTIAL PRESSURE SWITCH. NO RECURRENCE OF FAULT MESSAGES SINCE.