Service difficulty report · Fire Loop · Boeing 737522

Difficulty date
January 30, 2009
Submitted
February 4, 2009
Operation
Air carrier
Aircraft
N930UA
Make and model
Boeing 737522
Aircraft serial
26655
Aircraft time
45,411 hours, 32,522 cycles
Engine
Cfmint CFM563C1
Part
Fire Loop
Condition
Failed
Location
Aft Cargo Bay
Stage of operation
IN
How discovered
C
Nature of condition
L
Precautionary procedure
K

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

What was found

CARGO DETECTION SUPPRESSION B-LOOP FAIL LIGHTS ON, AFT PIT IS NOT TESTING ON B-LOOP. REPLACED FORWARD AFT B-LOOP DETECTOR.