Service difficulty report · Door Sill · Boeing 75724APF

Difficulty date
September 7, 2026
Submitted
October 27, 2026
Operation
Air carrier
Aircraft
N402UP
Make and model
Boeing 75724APF
Aircraft serial
23724
Aircraft time
39,932 hours, 27,205 cycles
Part
Door Sill
Part number
353N10101
Condition
Delaminated
Location
Zone 300
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

LIGHT DELAMINATION ALONG EXTERIOR VERTICAL EDGE OF APU INLET DOOR. QC MKD AS DB-13. COMPOSITE SKILL. INSTALLED APU AIR INTAKE DOOR AND PERFORMED MANUALLY OPERATE FULL CLOSED AND FULL OPENED AND VERIFIED THE APU AIR INTAKE DOOR MOVE SMOOTHLY AND VERIFIED GAP (0.025") BETWEEN THE FUSELAGE AND LEADING-EDGE CENTERLINE THE AIR INTAKE DOOR AND FOUND WITHIN LIMITS IAW AMM 49-15-05-004-001.

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