# SDR U2RA2025082100020

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 22, 2025
- Submitted: August 22, 2025
- Operation: Air carrier
- Aircraft: [N919CA](https://openairdocs.org/aircraft/N919CA), registered now
- Make and model: Boeing 747428
- Aircraft serial: 25302
- Aircraft time: 115,632 hours, 17,381 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Part number: 65B04135342
- Condition: Cracked
- Location: Zone 200
- Part time: 115,632 hours, 17,381 cycles
- Stage of operation: IN
- How discovered: U
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/U2RA2025082100020

## Discrepancy

DURING A CHECK AT RKSI, WHILE PERFORMING FCD 744-53-0076 R2, 250 FLIGHT CYCLE (FC) REPETITIVE INSPECTIONS FOR SCRIBE LINE FINDINGS ON SB 747-53A2563 LIMITED RETURN TO SERVICE (LRTS) PROGRAM, IT WAS DISCOVERED THAT SKIN PANEL 33L WITH P/N: 65B04135-343 HAVE 02 EACH 0.5 INCH CRACKS. PERMANENT REPAIR WAS ACCOMPLISHED IAW MSG MUA-MUA-25-0057-15B AND BOEINGREPAIRSKETCH_MUA-MUA-25-0057-12C REFERENCE COMMUNICATION SYSTEM MESSAGE NUMBERS FOR CASE #06216788, AND APPROVED ON 8100-9

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