Service difficulty report · Control Unit · Boeing 737990ER

Difficulty date
June 22, 2019
Submitted
June 24, 2019
Operation
Air carrier
Aircraft
N481AS
Make and model
Boeing 737990ER
Aircraft serial
44106
Aircraft time
15,429 hours, 5,073 cycles
Part
Control Unit
Part number
8300005605
Part serial
24440
Condition
Failed
Location
Window Heat
Part time
15,450 hours, 5,078 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

R2 WINDOW OVERHEAT LIGHT ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED R/H SIDE WHCU PRECAUTIONARY PER B737-900 AMM 30-41-11. PERFORMED GOOD OPS TEST OF R/H SIDE WHCU PER AMM 30-41-11-710-801. GROUND VERIFICATION IS SUCCESSFUL.