SDR ASAA2014030607108

Service difficulty report · Heater · Boeing 737990ER

Difficulty date: March 6, 2014
Submitted: March 10, 2014
Operation: Air carrier
Aircraft: N402AS
Make and model: Boeing 737990ER
Aircraft serial: 41189
Aircraft time: 5,290 hours, 1,711 cycles
System (JASC): 3040 · Windshield/Door Rain/Ice Removal
Part: Heater
Condition: Malfunctioned
Location: Window
Stage of operation: TX
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

DURING SHUTDOWN WITH WINDOW HEAT SWITCHES SELECTED OFF, THE LT FORWARD WINDOW OVERHEAT LIGHT WAS ILLUMINATED. CONFIRMED COULD FEEL HEAT ON THE LT FORWARD WINDOW ONLY. AFTER CYCLING WINDOW HEAT SWITCH ON AND OFF, LIGHT EXTINGUISHED. AFTER WAITING SEVERAL MINUTES, COULD NOT DETECT HEAT ON THE WINDOW. ACFT GROUNDED. PERFORMED WINDOW HEAT CONTROL UNIT BITE CHECK IAW FIM 30-41-801. NO DEFECT NOTED. PERFORMED WINDOW HEAT OPS TEST IAW AMM 30.41-00. NO DEFECT NOTED. NO HISTORY FOR PAST 30 DAYS.