Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
October 20, 2018
Submitted
October 22, 2018
Operation
Air carrier
Aircraft
N434AS
Make and model
Boeing 737990ER
Aircraft serial
61620
Aircraft time
10,569 hours, 3,449 cycles
Part
Warning System
Condition
False Activation
Location
Cockpit
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

R2 WINDOW OVERHEAT LIGHT CAME ON IN CLIMB OUT RAN CHECKLIST AND STILL OVERHEATED. GROUNDED - YES. CHECKED R2 WINDOW OVERHEAT LIGHT, PERFORMED WHCU BITE CHECK REF FIM 30-41 TASK 801 FOUND R SIDE WINDOW SENSOR FAULT HISTORY BUT FAULT CLEARS WHEN BIT VERIFY IS PRESSED. CHECKED SENSOR RESISTANCE REF FIM 30-41 TASK 811 RT WINDOW SENSOR OPERATES NORMAL, NO DEFECTS NOTED. OK FOR SERVICE.