Service difficulty report · Control Unit · Boeing 7379

Difficulty date
December 4, 2022
Submitted
December 6, 2022
Operation
Air carrier
Aircraft
N942AK
Make and model
Boeing 7379
Aircraft serial
44102
Aircraft time
1,505 hours, 432 cycles
Part
Control Unit
Condition
Faulted
Location
Window Overheat
Part time
1,493 hours, 429 cycles
Stage of operation
LD
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 RIGHT FWD OVERHEAT ON LANDING. GROUNDED - YES. REF B737-9 IFIM 30-41-00-810-829: CYCLING WINDOW HEAT SWITCH AFTER COOLING PERIOD. DOES NOT RESOLVE OVERHEAT INDICATION. WINDOW REMAINED COOL TO TOUCH. ACCOMPLISHED RESPECTIVE WHCU BITE PROCEDURE (WITHIN B737-9 AMM 30-41-11-710-80D. CURRENT FAULT IS P5-9, WITH WHCU-LRU SET FOR LAST SEVERAL LEGS. (NOTE: WHCU BIT-LAMP RESET NOT CLEAR CURRENT FAULT EITHER.) REMOVED AND INSTALLED NEW WHCU M323. PERFORMED SYS OPS TEST REF AMM 30-41-11-400-801. SYS OPS NML.

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