Service difficulty report · Skin · Boeing 7478F

Difficulty date
May 23, 2025
Submitted
June 20, 2025
Operation
Air carrier
Aircraft
N605UP
Make and model
Boeing 7478F
Aircraft serial
64252
Aircraft time
29,063 hours, 4,316 cycles
Part
Skin
Part number
183U330011
Part serial
1577
Condition
Damaged
Location
Lt Elevator
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

*** MAJOR REPAIR *** FAULT - HOLES SINK AND TOOL MARKS AROUND HOLES EDGE AT ELEV STA 250 OF L/H ELEVATOR (REPAIR) THE REPAIR WAS ACCOMPLISHED PER 747-8F SRM (REV. 45), SECTION 55-20-01-2R-1, REPAIR 1 (ELEVATOR SKIN PANEL REPAIRS), USING PREPREG MATERIAL. A 250°F (121°C) CURE WAS ACCOMPLISHED PER 747-8F SRM (REV. 45), SECTION 51-70-05-2R-7, REPAIR 7 (TYPICAL PREPREG REPAIR €“ DAMAGE TO A FASTENER HOLE). THIS REPAIR IS CONSIDERED PERMANENT.

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