Service difficulty report · Window · Boeing 737890

Difficulty date
May 21, 2017
Submitted
May 30, 2017
Operation
Air carrier
Aircraft
N516AS
Make and model
Boeing 737890
Aircraft serial
39044
Aircraft time
32,077 hours, 9,758 cycles
Part
Window
Part number
56100023
Part serial
10275H3249
Condition
Failed
Location
L2
Part time
24,185 hours, 7,073 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 SIDE WINDOW OVERHEAT. AFTER 2 MINUTES OFF WHEN REAPPLING HEAT, THE OVERHEAT LIGHT ILLUMINATED AGAIN IMMEDIATELY. ACFT GROUNDED. BITE CHECK OF WHCU IAW FIM 30-41, TASK 801. FAILS WINDOW SENSOR. VERIFIED M2675 COIL CORD ASSEMBLY GOOD IAW WDM 30-41-12. CHECKED RESISTANCE OF PRIMARY SENSOR AND IT WAS OPEN. MOVED TERMINAL TO SPARE SENSOR AND IT WAS ALSO BAD. MOVED SENSOR TERMINAL BACK TO PRIMARY SENSOR TAP. RETAPPED THE LT SIDE WINDOW IAW WDM 30-41-12. REMOVED AND REPLACED THE L2 SLIDING WINDOW, OPS AND ADJUSTMENT GOOD IAW AMM 56-12-11-400-801. PRESSURIZED ACFT, NO DEFECTS NOTED.