# SDR TRBA20120522006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 22, 2012
- Submitted: June 1, 2012
- Operation: Air carrier
- Aircraft: [N447AM](https://openairdocs.org/aircraft/N447AM), registered now
- Make and model: Aerosp ATR72
- Aircraft serial: 447
- Aircraft time: 28,926 hours, 4,815 cycles
- System (JASC): [5710 · Wing Main, Frame Structure](https://openairdocs.org/jasc/5710)
- Part: Structure
- Condition: Corroded
- Location: Lt Wing
- 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/TRBA20120522006

## Discrepancy

DURING MX INSPECTION,  FOUND THE LT WING BETWEEN RIBS 4 AND 5 WATER DRAIN VALVE CUTOUT WITH CORROSION.  PERFORM PERMANENT REPAIR IAW PART B OF EO E2-5700-488 AT PRIOR TO THE NEXT SCHEDULE C CHECK.  TEMPORARY DISPOSITION FOR CORROSION DAMAGE TO THE LOWER LT WING BETWEEN RIB 4 & 5  WATER DRAIN CUTOUT E2-5700-488. THE ACFT WAS RETURNED TO SERVICE.

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