Service difficulty report · Window · Boeing 737990ER

Difficulty date
January 27, 2020
Submitted
February 11, 2020
Operation
Air carrier
Aircraft
N453AS
Make and model
Boeing 737990ER
Aircraft serial
36354
Aircraft time
24,073 hours, 7,704 cycles
Part
Window
Part number
56100025
Part serial
12263H0536
Condition
Faulted
Location
Cockpit
Part time
27,294 hours, 8,690 cycles
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

LEFT SIDE WINDOW HEAT OVERHEAT CAME ON DURING CRUISE FAULT CODE 304 010 41. GROUNDED - YES. VISUAL INSPECTION OF PRIMARY AND SPARE SENSOR SHOWS DELAM. VERIFIED LH SIDE WINDOW RESISTANCE IAW B737-900 AMM 30-41-21. RESISTANCE READS 67.7 OHMS. MOVED WINDOW HEAT POWER LEAD W0420-1001-20 TO TERMINAL #2 ON TB5016 IAW AMM 56-12-11. REMOVED AND REPLACED LH SIDE WINDOW REF AMM 56-12-11. OPS AND LEAK CHECK GOOD.