Service difficulty report · Floorbeam · Boeing 75724APF

Difficulty date
April 2, 2025
Submitted
April 22, 2025
Operation
Air carrier
Aircraft
N470UP
Make and model
Boeing 75724APF
Aircraft serial
25486
Aircraft time
34,739 hours, 20,775 cycles
Part
Floorbeam
Part number
149N765139
Condition
Corroded
Location
Zone 100
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

CORROSION ON L/H SIDE T CHORD AT STA 1220 BL 30.75- BL 57.50 REMOVED T-CHORD ON L/H SIDE AT STA 1220 BL 30.75 BL 57.50 FOR DELAMINATION OUT OF LIMITS IAW 53-00-71-1A-1 MATERAIL LOST 90% ALLOWABLE DAMAGE 10%. DETAIL XII.RECEIVED NEW T-CHORD FROM MACHINE SHOP ON TRAVELER # T25/1809469.INSTALLED NEW T-CHORD AT STA 1220 LBL30 - LBL57.

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