Service difficulty report · Sensing Element · Boeing 737322

Difficulty date
January 1, 2005
Submitted
January 25, 2005
Operation
Air carrier
Aircraft
N322UA
Make and model
Boeing 737322
Aircraft serial
23954
Aircraft time
49,699 hours, 27,202 cycles
Engine
Ge CFM56*
Engine time
47,337 hours, 29,005 cycles
Part
Sensing Element
Part number
899252
Condition
Damaged
Location
Nr 1 Engine
Stage of operation
CR
How discovered
O
Nature of condition
N
Precautionary procedure
E

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

What was found

CREW REPORT NR 1 ENG -A- OVERHEAT LIGHT ILLUMINATED. *S/D* CREW REPORTED NR 1 ENGINE -A- LOOP OVERHEAT LIGHT ILLUMINATED. SHUTDOWN ENGINE AND DISCHARGED BOTH FIRE EXTINGUISHER BOTTLES. OVERHEAT DETECTION LOOP -B- WAS INOPERATIVE AND DEFERRED, ELIMINATING REDUNDANCY FEATURE OF THE OVERHEAT DETECTION SYSTEM. PERFORMED TROUBLESHOOTING OF OVERHEAT DETECTION SYSTEM. FOUND LOWER FAN CASE LOOP -A- DETECTOR M1121 INTERMITTENT. INSTALLED SERVICEABLE OVERHEAT DETECTOR LOOP.