Service difficulty report · Electronic Unit · Boeing 737990ER

Difficulty date
December 4, 2022
Submitted
December 12, 2022
Operation
Air carrier
Aircraft
N486AS
Make and model
Boeing 737990ER
Aircraft serial
44107
Aircraft time
26,730 hours, 8,411 cycles
Part
Electronic Unit
Part number
473925
Condition
Faulty
Location
Aft Cargo Compt
Stage of operation
TX
How discovered
V
Nature of condition
J
Precautionary procedure
K

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

What was found

AFT ARM LIGHT FAILS TO ILLUMINATE WHEN TESTING THE AFT CARGO FIRE PANEL. GROUNDED - YES. PER B737-900 FIM 26-16 TASK 806, REMOVED AND REPLACED LOWER AFT CEU (M2237). OPS CHECK GOOD. REF B737-900 AMM 26-16-02/401.