Service difficulty report · Fire Detector · Boeing 737890

Difficulty date
April 20, 2026
Submitted
April 21, 2026
Operation
Air carrier
Aircraft
N557AS
Make and model
Boeing 737890
Aircraft serial
35176
Aircraft time
70,930 hours, 21,258 cycles
Part
Fire Detector
Condition
Malfunctioned
Location
Zone 100
Stage of operation
CL
How discovered
O
Nature of condition
N
Precautionary procedure
O

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

What was found

MOMENTARY WHEEL WELL FIRE WARNINGS ON CLIMBOUT. GOT BELL, MASTER FIRE, AND WW FIRE INDICATION. NO MASTER CAUTION. GROUNDED - YES. AFTER CREW CONSULT WHEEL WELL WARNING WAS ONLY MOMENTARY THEN EXTINGUISHED PERFORMED BITE CHECK OF OVERHEAT DETECTOR CONTROL MODULE NO STORED OR CURRENT FAULTS IAW AMM TASK 26-18-801 PERFORMED OPS CHECK NO DEFECTS NOTED IAW AMM 26-18-00-710-801.