Service difficulty report · Control Unit · Boeing 7878

Difficulty date
May 28, 2025
Submitted
May 29, 2025
Operation
Air carrier
Aircraft
N45905
Make and model
Boeing 7878
Aircraft serial
34825
Aircraft time
47,883 hours, 5,941 cycles
Part
Control Unit
Part number
100260103
Condition
Inoperative
Location
Zone 200
Stage of operation
IN
How discovered
C
Nature of condition
L
Precautionary procedure
K

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

What was found

EXIT LOCATOR SIGN AT DOOR 4L INOP. REMOVED AND REPLACED DOOR 4L EXIT LOCATOR SIGN IAW AMM 33-51-01, NO HELP. NEW PART REMAINS INSTALLED. NOTED A LOAD FAULT ON THE WELS CONTROL UNIT 7, WHICH IS RESPONSIBLE FOR THIS LIGHT. REMOVED AND REPLACED WELS CONTROL UNIT 7 IAW AMM 33-51-07. OPS CHECK GOOD, LIGHT ILLUMINATES AND NO FAULTS ARE NOTED.

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