# SDR UIEA2023052200495

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 17, 2023
- Submitted: May 22, 2023
- Operation: Air carrier
- Aircraft: [N499MC](https://openairdocs.org/aircraft/N499MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29260
- Aircraft time: 93,848 hours, 16,031 cycles
- System (JASC): [5300 · Fuselage Structure (General)](https://openairdocs.org/jasc/5300)
- Part: Unknown
- Condition: Unknown
- Location: Unknown
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2023052200495

## Discrepancy

CORROSION ON SKIN INNER SURFACE TOTAL 21 EACH, WHEN PERFORM SB 747-53A2878(<P>1) PERFORM EI T2023A53M-854 SEQUENCE A REV 0. 2) PERFORM EI T2023A53M-854 SEQUENCE B REV 1. 3) PERFORM EI T2023A53M-854 SEQUENCE C REV 2. 4) PERFORM EI T2023A53M-854 SEQUENCE D REV 4. 5) ACCOMPLISH EI T2023A53M-854 REV 4. 6) ACCOMPLISH EI T2023A53M-854 REV 5. 7) JOB COMPLETED AND CONDITION CHECK NORMAL</P>)

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