SDR IPXA2026042313853

Service difficulty report · Floor Support · Boeing 75724APF

Difficulty date: April 15, 2026
Submitted: April 27, 2026
Operation: Air carrier
Aircraft: N428UP
Make and model: Boeing 75724APF
Aircraft serial: 25459
Aircraft time: 33,361 hours, 22,894 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Floor Support
Part number: 144N5081
Condition: Corroded
Location: Zone 200
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

MAIN DECK CABIN FLOOR STRUCTURE, BS 900 - 1080, LBL 45.5 - 54.9 CORRODED, REMOVED CORROSION ON MAIN DECK CABIN FLOOR STRUCTURE FROM STA. 900-1080 AND LBL 45.5 TO 54.9 L/H IAW SRM 51-10-02-0G-0. IAW AIPC 53-40-66-01, REV 138, AND DWGS 14405003, REPLACEMENT FLOOR SUPPORT COVER PLATE INSTALLED TO ACFT CONFIGURATION IAW AIPC AND DWGS.

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