SDR 2002UALA01623

Service difficulty report · Overheat Loop · Boeing 737322

Difficulty date: October 25, 2002
Submitted: November 7, 2002
Operation: Air carrier
Aircraft: N394UA
Make and model: Boeing 737322
Aircraft serial: 24669
Aircraft time: 35,895 hours, 25,830 cycles
Engine: Ge CFM56*
System (JASC): 2613 · Overheat Detection
Part: Overheat Loop
Part number: 355574255
Condition: Shorted
Location: Lt Wing
Stage of operation: DE
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

WING BODY OVERHEAT LIGHT ILLUMINATED EN ROUTE, AND RETURNED TO FIELD. PERFORMED INSPECTION OF THE LEFT WING BODY OVERHEAT DETECTION SYSTEM AND FOUND A SHORT TO GROUND ON PIN 9 OF CONNECTOR D742. ISOLATED THE FAULT TO A SHORTED AFT KEEL BEAM DETECTOR M273. REPLACED DETECTOR AND AIRCRAFT WAS RETURNED TO REVENUE SERVICE.