Service difficulty report · Control Unit · Boeing 737990ER

Difficulty date
June 19, 2017
Submitted
June 23, 2017
Operation
Air carrier
Aircraft
N479AS
Make and model
Boeing 737990ER
Aircraft serial
60576
Aircraft time
7,752 hours, 2,608 cycles
Part
Control Unit
Part number
8300005605
Part serial
24270
Condition
Failed
Location
Window Heat
Part time
7,797 hours, 2,621 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

WINDSHIELD OVERHEAT ILLUMINATED ON RIGHT SIDE. RAN CHECKLIST. CUT OFF THREE MINUTES. TURNED BACK ON AND ILLUMINATED AGAIN. CUT OFF REMAINDER OF FLIGHT. ACFT GROUNDED. REMOVED AND REPLACED THE RIGHT WHCU IAW AMM TASK 30-41-11-000-801/-400-801. CHECKED GOOD. NO FAULT NOTED. OPS NORMAL IAW AMM 30-41-11/501.