Service difficulty report · Sensor · Boeing 737990ER

Difficulty date
April 27, 2018
Submitted
April 30, 2018
Operation
Air carrier
Aircraft
N440AS
Make and model
Boeing 737990ER
Aircraft serial
41705
Aircraft time
18,005 hours, 6,008 cycles
Part
Sensor
Condition
Failed
Location
Window Heat
Part time
10,521 hours, 3,593 cycles
Stage of operation
NR
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 FWD WINDOW OVERHEAT LIGHT ILLUMINATED, DID NOT RESET WITH CHECKLIST. ACFT GROUNDED. ACCOMPLISHED WHCV BITE IAW FIM 30-41 TASK 801. CAPTAIN`S FWD WINDOW SENSOR FAULTED. RANG BOTH SENSORS AT CONNECTORS D1044A PINS 13, 26 BOTH SENSORS RANG OPEN IAW WDM 30-41-11. REMOVED AND REPLACED THE L1 WINDOW IAW AMM 56-11-11-000-801. REPOSITIONED THE TERMINAL TAP FROM TERMINAL FWD TO TERMINAL ONE ON TB5010 OF M321 WHCU. OPS AND LEAK CHECKED GOOD.