Service difficulty report · Control Unit · Boeing 737522

Difficulty date
August 3, 2001
Submitted
September 5, 2001
Operation
Air carrier
Aircraft
N906UA
Make and model
Boeing 737522
Aircraft serial
25006
Aircraft time
30,981 hours, 19,656 cycles
Engine
Ge CFM56*
Part
Control Unit
Condition
Malfunctioned
Location
Fire Detection
Stage of operation
CL
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

UNSCHEDULED LANDING DUE TO FIRE BELL ACTIVATION. REMOVED AND REPLACED FIRE OVERHEAT DETECTOR CONTROL UNIT AND ENG/APU FIRE CONTROL MODULE. PERFORMED OPERATIONAL TEST AND AIRCRAFT WAS RETURNED TO REVENUE SERVICE.