SDR IPXA2025101443697

Service difficulty report · Channel · Boeing 74744AF

Difficulty date: October 2, 2025
Submitted: October 15, 2025
Operation: Air carrier
Aircraft: N573UP
Make and model: Boeing 74744AF
Aircraft serial: 35662
Aircraft time: 62,252 hours, 9,878 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Channel
Part number: 142U1023104
Condition: Cracked
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

MAJOR REPAIR, DURING PERFORM EO-26856-JIC001 FOUND CHANNEL CRACK AT STA 740 L/H AFT SIDE. PERFORMED THE HEAT TREATMENT FROM 2024-O-071 CLAD TO T42 CONDITION I.A.W. EGAT WORK SHEET 50730, STEP 4.I. (REFER TO SHOP LOG 2025-290). I.A.W. SRM 53-20-30-2R-2, REV.104 AND EGAT WORK SHEET 50730, STEP 4. REPAIR DAMAGE AREA IAW. SRM 53-20-30-2R-2, REV 104, EGAT WORK SHEET 50730.

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