# SDR TRBA20120522005

- 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, 32,265 cycles
- System (JASC): [5712 · Wing, Rib/Bulkhead](https://openairdocs.org/jasc/5712)
- Part: Rib
- 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/TRBA20120522005

## Discrepancy

DURING MX INSP FOUND THE LT WING LOWER SKIN RIB NR 5 FUEL DRAIN VALVE SURROUNDING AREA WITH CORROSION.  THE ACFT WAS REMOVED FROM SERVICE.  FOLLOWING TURNOVER PERFORMED ALL REMAINING STEPS EO E2-5700-488.  C/W  E2-5700-488 LOWER WING BETWEEN RIB 4 & 5 BLEND OUT.  THE ACFT WAS RETURNED TO SERVICE.

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