SDR ASAA2016021515456

Service difficulty report · Sensor · Boeing 737990ER

Difficulty date: February 15, 2016
Submitted: February 17, 2016
Operation: Air carrier
Aircraft: N409AS
Make and model: Boeing 737990ER
Aircraft serial: 41733
Aircraft time: 12,198 hours, 3,976 cycles
System (JASC): 3040 · Windshield/Door Rain/Ice Removal
Part: Sensor
Part number: 1019755
Condition: Failed
Location: Window Heat
Stage of operation: CR
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

WINDOW HEAT RT SIDE OVERHEAT LIGHT ILLUMINATED IN CRUISE. RAN QRH. LIGHT CAME ON AGAIN. ACFT GROUNDED. PERFORM WHCU BITE IAW FIM 30-41, TASK 801. WHCU SHOWS SENSOR FAULT, SWAPPED SENSOR TO SPARE IAW FIM 30-41, TASK 811. RE-ACCOMPLISHED BITE WITH NO FAULTS. WINDOW HEAT, OPS NORMAL.