Service difficulty report · Actuator · Boeing 7478F

Difficulty date
May 21, 2026
Submitted
May 29, 2026
Operation
Air carrier
Aircraft
N611UP
Make and model
Boeing 7478F
Aircraft serial
64257
Aircraft time
29,966 hours, 4,379 cycles
Part
Actuator
Part number
178800209
Part serial
59302
Condition
Cracked
Location
Zone 500 Slats
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 LT WING NR 5 INBD , NR 3 INBD , NR 10 OUTBD'S INBD V.C FLAP ROTARY ACTUATOR CORROSION AND NO.8 OUTBD'S OUTBD V.C FLAP ROTARY ACTUATOR COVER CRACK. I.A.W AMM 27-81-07-404-008 REV.50 STEP 3.A TO 3.F.(2)(N) INSTALLED THE LH WING NO.3 INBD SIDE, NO.5 INBD SIDE, NO.8 OUTBD'S OUTBD SIDE AND NO.10 OUTBD'S INBD SIDE ROTARY ACTUATOR.

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