# SDR AALA20010819

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 16, 2001
- Submitted: May 22, 2001
- Operation: Air carrier
- Aircraft: [N721AA](https://openairdocs.org/aircraft/N721AA), registered now
- Make and model: Boeing 727227
- Aircraft serial: 20729
- System (JASC): [5730 · Wing, Plate/Skin](https://openairdocs.org/jasc/5730)
- Part: Skin
- Condition: Corroded
- Location: Center 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/AALA20010819

## Discrepancy

TUL - CENTER WING LOWER SKIN BULGING INBOARD OF RIGHT SECONDARY HEAT EXCHANGER FS 787-790.  INSTALLED DOUBLER AND TRIPLER PER RM 57-30-3 PAGE 1.  (M)

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