SDR ASAA2017022619948

Service difficulty report · Wire · Boeing 737990ER

Difficulty date: February 26, 2017
Submitted: February 28, 2017
Operation: Air carrier
Aircraft: N477AS
Make and model: Boeing 737990ER
Aircraft serial: 40716
Aircraft time: 6,787 hours, 2,237 cycles
System (JASC): 3097 · Ice/Rain Protection System Wiring
Part: Wire
Part number: ABC57021
Condition: Failed
Location: R2 Window
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

AT CRUISE R2 WINDSHIELD OVERHEAT LIGHT ILLUMINATED, PERFORMED QRH CHECKLIST, LIGHT REMAINED OUT. ACFT GROUNDED. NUMEROUS FAULT FOR SENSOR ON WHCU BITE. RESISTANCE CHECKED FOR WINDOW COLD & EXTENDED HEAT APPLIED SHOW SAME VALUE WITHIN LIMITS, IAW AMM 30-41-21 & WDM 30-41-11. REPLACED COIL CORD, WINDOW HEAT OPERATIONAL TEST PASSED.