Service difficulty report · Proximity Sensor · Boeing 757224

Difficulty date
March 16, 2025
Submitted
March 20, 2025
Operation
Air carrier
Aircraft
N18112
Make and model
Boeing 757224
Aircraft serial
27302
Aircraft time
104,712 hours, 24,766 cycles
Part
Proximity Sensor
Part number
81020401FS
Condition
Faulted
Location
Zone 800
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

LVL1 CHRONIC HIST OF DOOR 4L ARM LIGHT INTERMITTENT STAY ON W/ D OOR DISARMED. CYCLED HANDLE & CLEARED DEBRIS CHK GOOD BUT ISSUE REPEAT. WHEN WORKING W/ DOOR ARM/DISARM SYS, PLS REF SLIDE SAFET Y CHKLIST TO PREVENT OF SLIDE DEPLOYMENT. DUE TO REPEAT ISSUE, T ECHSUP REQUEST TO INSPECT FLOOR PROX SENSORS (S10222 & S10223) R EF WDM 25-66-11 FOR ANY DEFECTS, DAMAGED & SECURITY. CHK FOR COR RECT GIRT BAR PROX SW CLEARANCE & TARGETS REF MM 25-66-11-822-01 1. ADJUST AS REQ'D. CORRECT ANY FAULT FOUND. IF NFF PLS REPLACE PROX SENSORS S10222 & S10223 AS PRECAUTIONARY. UPDATE YOUR FINDI NGS ON THIS L/P. THANKS ADDED PART. CARRIED BY ELB TROUBLESHOT DOOR 4L, GOT SLIDE LIGHT TO STAY ON SEVERAL TIMES WITH DOOR NOT ARMED, TAPPING ON SENSOR S10223 MADE LIGHT EXTINQUISH. FOUND SOME DAMAGE TO SAME SENSOR. REMOVED AND REPLACED SENSOR S10223. OPERATES NORMAL.