Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
July 16, 2019
Submitted
July 19, 2019
Operation
Air carrier
Aircraft
N448AS
Make and model
Boeing 737990ER
Aircraft serial
36356
Aircraft time
13,225 hours, 4,323 cycles
Part
Warning System
Condition
False Activation
Location
Cockpit
Stage of operation
NR
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

RT SIDE W/S OVERHEAT ILLUMINATED RAN QRH PROCEDURE- WINDOW OVERHEAT LIGHT ILLUMINATES AGAIN. GROUNDED - YES. REF FIM 30-41 TASK 811. WHCU SHOWS RIGHT SIDE WINDOW SENSOR #1 FAULT IN FLIGHT HISTORY, NO CURRENT FAULTS. RESISTANCE VALUES WERE WITHIN LIMITS, COULD NOT DUPLICATE. AS A PRECAUTION, MOVED TERMINAL WIRE FROM PRIMARY TO SPARE POSITION. OPS TEST NORMAL.