SDR ASAA2015112813974

Service difficulty report · Sensor · Boeing 737890

Difficulty date: November 28, 2015
Submitted: December 1, 2015
Operation: Air carrier
Aircraft: N597AS
Make and model: Boeing 737890
Aircraft serial: 35689
Aircraft time: 29,307 hours, 9,062 cycles
System (JASC): 3040 · Windshield/Door Rain/Ice Removal
Part: Sensor
Condition: Faulted
Location: L2 Window
Part time: 28,365 hours, 8,786 cycles
Stage of operation: AP
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 FORWARD WINDOW OVERHEAT LIGHT ILLUMINATED ON APPROACH. WINDOW HEAT TURNED OFF IAW QRH TURNED WINDOW HEAT BACK ON AFTER 5 MINS, OPS NORMAL. ACFT GROUNDED. PERFORMED FIM 30-41, TASK 801 WHCU BITE TEST. FOUND WINDOW SENSOR FAULT. PERFORMED FIM 30-41, TASK 811. FOUND SENSOR TO BE WITHIN ACCEPTABLE LIMITS. FOUND WINDOW RESISTANCE TO BE 62.4 WITH A RANGE OF 62.3-69.0 IAW WDM 30-41-12, PG 2.1. REPLACED LEFT SIDE WINDOW AND COIL CORD PRESSURIZED AND OPS CK GOOD REF 56-12-11, 30-41-00 AND 05-51-91.