SDR ASAA2018010823112

Service difficulty report · Sensor · Boeing 737890

Difficulty date: January 8, 2018
Submitted: January 10, 2018
Operation: Air carrier
Aircraft: N577AS
Make and model: Boeing 737890
Aircraft serial: 35186
Aircraft time: 40,994 hours, 12,279 cycles
System (JASC): 3040 · Windshield/Door Rain/Ice Removal
Part: Sensor
Condition: Faulted
Location: R1 Windshield
Part time: 23,275 hours, 6,876 cycles
Stage of operation: NR
How discovered: O
Nature of condition: B
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FIRST OFFICER`S R1 WNDSHIELD HAD AN ARCING AT TWO ELECTRICAL CONNECTIONS INTERNAL TO THE GLASS IN UPPER LEFT AND UPPER RIGHT CORNERS. ACFT GROUNDED. CONFIRMED ARCING OF THE R1 WINDOW AT PRIMARY AND SECONDARY SWITCH POSITIONS. WHCU SHOWS A WINDOW SENSOR FAULT AND WHCU - LRU. OVERHEAT LIGHT ILLUMINATES AT P-5 PANEL ON BOTH SENSORS. VERIFIED THE NEW WINDOW H-13 TAP IS CORRECT. REMOVED AND REPLACED THE R1 WINDOW IAW AMM 56-11-11-000-801, AND AMM 56-11-11-400-801. OPS CHECKED GOOD.