# SDR CALA0700663

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 29, 2007
- Submitted: November 9, 2007
- Operation: Air carrier
- Aircraft: [N12221](https://openairdocs.org/aircraft/N12221), registered now
- Make and model: Boeing 737824
- Aircraft serial: 28930
- Aircraft time: 28,574 hours, 10,254 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Part number: 147A31103
- Condition: Corroded
- Location: Bs 907-927
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA0700663

## Discrepancy

CORROSION WAS FOUND IN FUSELAGE SKIN AT LT AFT FUSELAGE AT VACUUM WASTE EXHAUST, STA 907-927, S21L TO S22L DURING A WALKAROUND.  THE SKIN WAS REPAIRED IAW ECRA 5330-03715 AND A DIP WAS INITIATED TO PERFORM A PERMANENT REPAIR WITHIN 12 MONTHS.

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