SDR IPXA2026071191237

Service difficulty report · Retainer · Boeing 75724APF

Difficulty date: June 27, 2026
Submitted: July 14, 2026
Operation: Air carrier
Aircraft: N453UP
Make and model: Boeing 75724APF
Aircraft serial: 25474
Aircraft time: 40,247 hours, 23,271 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Retainer
Part number: 146N50642
Part serial: NSN
Condition: Corroded
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

DURING REMOVAL ACCESS FOR BEAM REPAIR AT BS 1681 FOUND A RETAINER CORRODED FROM BS 1600 - 1681, RBL 65. RETAINER FOUND TO BE CORRODED, DELAMINATED AND CRACKED, REMOVED RETAINER IAW SRM 51-40+02. INSTALLED NEW RETAINER BETWEEN BS 1600 - 1681, RBL 65.

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