Service difficulty report · Sensor · Boeing 737990ER

Difficulty date
April 9, 2017
Submitted
April 12, 2017
Operation
Air carrier
Aircraft
N486AS
Make and model
Boeing 737990ER
Aircraft serial
44107
Aircraft time
6,271 hours, 2,123 cycles
Part
Sensor
Condition
Malfunctioned
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

RIGHT SIDE WINDOW OVERHEAT ILLUMINATED AT CRUISE. QRH FOLLOWED AND LIGHT EXTINGUISHED. ACFT GROUNDED. TROUBLESHOT IAW FIM 30-41 TASK 811. FOUND WINDOW SENSOR FAILED ON LAST 7 LEGS ON WHCU. DUE TO HISTORY, SWAPPED FROM PRIMARY SENSOR TO SPARE SENSOR, RESISTANCE CHECKED GOOD IAW AMM 30-41-21-760-801.