Service difficulty report · Actuator · Boeing 7478F

Difficulty date
May 9, 2026
Submitted
May 20, 2026
Operation
Air carrier
Aircraft
N621UP
Make and model
Boeing 7478F
Aircraft serial
65785
Aircraft time
24,034 hours, 3,568 cycles
Part
Actuator
Part number
D20709
Part serial
9603A
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

FOUND MAIN DECK SIDE CARGO DOOR LATCH ACTUATOR CAN NOT GET THE CORRECT NUMBER OF FREE TURNS AND SLIP WHEN THE TORQUE IS BELOW 70 IN-LB. (REPLACE). I.A.W. AMM 52-32-09-404-010 REV.50 STEP 3.A~H INSTALL THE LATCH ACTUATOR. I.A.W. AMM 52-32-09-404-010 REV.50 STEP 3.I ADJUSTMENT THE LATCH ACTUATOR AND OPERATIONAL TEST NORMAL.

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