Service difficulty report · Proximity Sensor · Boeing 777222

Difficulty date
December 14, 2025
Submitted
December 17, 2025
Operation
Air carrier
Aircraft
N773UA
Make and model
Boeing 777222
Aircraft serial
26929
Aircraft time
109,360 hours, 20,863 cycles
Part
Proximity Sensor
Part number
873101
Condition
Faulted
Location
Zone 800
Stage of operation
CR
How discovered
O
Nature of condition
N
Precautionary procedure
A

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

What was found

FWD CARGO OPEN ICAS IN FLIGHT MESSAGE MSG 52-12330. CAUTION EXTINGUISHED ON LANDING. REF LP 7277402. SWITCHES S52021, S52042, AND S52022 DISCONNECTED FOR DEFERAL. NEEDS FURTHER TS. T/S FLCD DOOR INDICATION PROXIMITY SENSOR REF FIM 52-34 TASK 811. FOUND LATCHED FORWARD CARGO DOOR PROXIMITY SENSOR S52042 FAULTY. REMOVED AND REPLACED S52042 SENSOR REF AMM 52-71-02-900-802. OPS CHECKED GOOD.