# SDR UALA2013040402208

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 9, 2009
- Submitted: April 29, 2013
- Operation: Air carrier
- Aircraft: N104UA
- Make and model: Boeing 747422
- Aircraft serial: 26902
- Aircraft time: 48,218 hours, 5,707 cycles
- Engine: Pwa PW4056
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Condition: Corroded
- Location: Bs 1480 S12l-R
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2013040402208

## Discrepancy

NUMEROUS AREAS OF CORROSION FOUND ON FUSELAGE INTERIOR SKIN CROWN AREA AT BS 1480 BETWEEN STR 12L & 12R.  CORROSION WAS REMOVED & SKIN BLENDED OUT TO 10:1 RATIO WITH SEVERAL AREAS OF MATERIAL LOSS GREATER THAN ALLOWED BY SRM LIMITS.  SKIN WAS TREATED & PRIMED REF SRM 51-20-01.  REPAIRED IAW EC82-5330-000BP-A.  MAJOR REPAIR.

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