Service difficulty report · Fire Loop · Boeing 737890

Difficulty date
August 9, 2017
Submitted
August 11, 2017
Operation
Air carrier
Aircraft
N577AS
Make and model
Boeing 737890
Aircraft serial
35186
Aircraft time
39,456 hours, 11,725 cycles
Part
Fire Loop
Condition
Malfunctioned
Location
Fwd Cargo
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

DURING TEST, FWD CARGO FIRE TEST WOULD NOT ILLUMINATE. TRIED LOOP A AND B WITH SAME RESULT. ACFT GROUNDED. RESET CARGO FIRE FWD DETECTION A & B CIRCUIT BREAKER IAW AMM 20-60-00. PERFORMED CARGO TEST, NO FAULTS. SYSTEM OPS NORMAL.