SDR ASAA2016041016338

Service difficulty report · Sensor · Boeing 737990ER

Difficulty date: April 10, 2016
Submitted: April 12, 2016
Operation: Air carrier
Aircraft: N457AS
Make and model: Boeing 737990ER
Aircraft serial: 36355
Aircraft time: 8,558 hours, 2,801 cycles
System (JASC): 3040 · Windshield/Door Rain/Ice Removal
Part: Sensor
Condition: False Indication
Location: Window Heat
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

RIGHT SIDE WINDOW HEAT OVERHEAT LIGHT CAME ON DURING CLIMBOUT, TURNED IT OFF FOLLOWED QRH, LATER ON, CAME BACK ON. FLEW 3+ HOURS, NORMAL OPS. ON FINAL APPROACH, OVERHEAT LIGHT CAME BACK ON. WINDOW NEVER FELT HOT. ACFT GROUNDED. ACCOMPLISHED WHCU BITE, FOUND WINDOW SENSOR FAULT. CLEARED FAULT AND WINDOW HEAT, OPS CHECK GOOD, REF FIM 30-41-801.