Service difficulty report · Control Unit · Boeing 737823

Difficulty date
March 8, 2025
Submitted
March 10, 2025
Operation
Air carrier
Aircraft
N920NN
Make and model
Boeing 737823
Aircraft serial
31165
Aircraft time
35,526 hours, 15,365 cycles
Part
Control Unit
Part number
142219
Part serial
31248300439
Condition
Faulted
Location
Zone 700
Part time
3,452 hours, 1,431 cycles
Stage of operation
TX
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

COMPONENT IN SHOP MAINTENANCE: ANTI-SKID CAUTION LIGHT FLASHED CONSTANTLY AFTER TOUCHDOWN AND TAXI. (AACU)-ANTISKID AUTOBRAKE CONTROL UNIT TROUBLESHOT INDIACTED BOX-A AND BOX-B BOTH HAD ADIRU FAULTS. REMOVE AND REPLACED (AACU)-ANTISKID AUTOBRAKE CONTROL UNIT, PER AMM 32-42-21.