Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
July 22, 2018
Submitted
July 23, 2018
Operation
Air carrier
Aircraft
N487AS
Make and model
Boeing 737990ER
Aircraft serial
44108
Aircraft time
11,076 hours, 3,661 cycles
Part
Warning System
Condition
False Activation
Location
Cockpit
Stage of operation
CR
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

RIGHT SIDE WINDOW OVERHEAT LIGHT ILLUMINATED IN CRUISE. FOLLOWED QRH AND LIGHT EXTINGUISHED. GROUNDED - YES. ACCOMPLISHED CONTROL UNIT BITE PER FIM 30-41 TASK 801. BITE PASSES. FAULT HISTORY SHOWS WINDOW SENSOR FAULT FOR LAST FLIGHT. FIM 30-41 TASK 812 SHOWS NO FAULTS. SENSOR RESISTANCE WAS 327 OHMS AT 20 DEG C. GOOD PER AMM TASK 30-41-21-760-801.