SDR CALA2013120293357

Service difficulty report · Warning Message · Boeing 777222

Difficulty date: November 27, 2013
Submitted: December 10, 2013
Operation: Air carrier
Aircraft: N214UA
Make and model: Boeing 777222
Aircraft serial: 30220
Aircraft time: 48,255 hours, 10,272 cycles
Engine: Pwa PW4077
System (JASC): 2613 · Overheat Detection
Part: Warning Message
Condition: False Indication
Location: Overheat Loop
Stage of operation: IN
How discovered: V
Nature of condition: N
Precautionary procedure: K

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

What was found

OVERHEAT CIRCUIT L1 LT ENG OVERHEAT DETECTION CIRCUIT 1 FAILURE. PERFORMED FIM26-11 TASK 808, ALL RESISTANCE READINGS SHOWING NORMAL. VISUALLY INSPECTED WIRES & CONNECTORS NO CRITICAL DAMAGE FOUND. PERFORMED ENG FIRE DETECTION OPERATION TEST. UNABLE TO DUPLICATE MESSAGE OPERATIONS OK.