Service difficulty report · Probe · Boeing 777222

Difficulty date
October 5, 2011
Submitted
October 7, 2011
Operation
Air carrier
Aircraft
N214UA
Make and model
Boeing 777222
Aircraft serial
30220
Aircraft time
39,930 hours, 8,644 cycles
Engine
Pwa PW4077
Part
Probe
Condition
Faulty
Location
Fuel Tank
Stage of operation
NR
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

CREW REPORT LEFT WING FUEL QTY INDICATED IMBALANCE APPROX 3000 LBS LOWER THAN RIGHT WING. IND RET TO NORM AFTER BRIEF PERIOD. SNAPSHOT DATA PROBE LM-17 FAULT AND PROBE LM-16 \0.0\. SAME PROBES IN RT TANK IND NORMAL FUEL LEVELS. SAMC TEXT: RERACK THE FUEL QTY PROCESSOR AND TEST PER MM. ACP DRIP STK CHECK, AND CONFIRM EICAS MAINT FUEL. ACP SAMC TEXT. THIS CF ITEM IS FOR LWR LVL MAINT MSG 28-20117 & 28-20075: RM15 & LM17 PROBE SIGNAL OUT OF RANGE REPEAT DEFECTS. ONE PROBE FAULT IN EA TANK OK TO DISPATCH (MT28-UA9) CF PER MOP 05-044-09.