Service difficulty report · Thermocouple · Boeing 777222

Difficulty date
August 18, 2013
Submitted
August 21, 2013
Operation
Air carrier
Aircraft
N217UA
Make and model
Boeing 777222
Aircraft serial
30550
Aircraft time
55,139 hours, 6,754 cycles
Engine
Pwa PW40903
Part
Thermocouple
Condition
Faulty
Location
Lt Engine
Stage of operation
NR
How discovered
9
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

THERMOCOUPLE PROBE LT ENGINE CH "B" SIGNAL IS OUT OF RANGE, MESSAGE 75-50801. REPLACED NR 1 ENGINE TCA THERMOCOUPLE PROBE, TESTED GOOD.