SDR ASAA2019081943404

Service difficulty report · Sensor · Boeing 737990ER

Difficulty date: August 14, 2019
Submitted: August 19, 2019
Operation: Air carrier
Aircraft: N493AS
Make and model: Boeing 737990ER
Aircraft serial: 41727
Aircraft time: 13,159 hours, 4,358 cycles
System (JASC): 3040 · Windshield/Door Rain/Ice Removal
Part: Sensor
Condition: Faulted
Location: Window
Stage of operation: CL
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

LEFT SIDE WINDOW OVERHEAT LIGHT ILLUMINATED ON CLIMBOUT. FOLLOWED QRH. LIGHT STAYED OUT UNTIL LANDING ROLLOUT. QRH COMPLETED WITH SWITCH OFF FOR REMAINDER OF TAXI. GROUNDED - YES. REF B737-900 FIM TASK 30-41 TASK 801, WHCU BITE LOGGED WINDOW SENSOR FAULT. REF FIM TASK 30-41 TASK 811, SWITCHED TO SPARE SENSOR TERMINAL. WHCU VERIFY BITE TESTED GOOD. LEFT SIDE WINDOW HEAT OPS TESTED NORMAL. NO CONFIG CHG.