# SDR NACA20130221006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2013
- Submitted: February 28, 2013
- Operation: Air carrier
- Aircraft: [N321DL](https://openairdocs.org/aircraft/N321DL), registered now
- Make and model: Boeing 737232
- Aircraft serial: 23093
- Aircraft time: 68,696 hours, 52,647 cycles
- System (JASC): [5347 · Fuselage, Seat/Cargo Attach Fittings](https://openairdocs.org/jasc/5347)
- Part: Seat Track
- Condition: Corroded
- Location: Fuselage
- 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/NACA20130221006

## Discrepancy

CORROSION ON BROWNLINE BS 420 - BS 470; LBL 45.  CORROSION ON BROWNLINE FS 420 - 470 LBL 45 REMOVED IAW BOEING 737 SRM 511006 REV 105, BEYOND LIMITS IAW B737 SRM 53101 FIG 1 REV 105 NOMINAL THICKNESS .080" REMAINING .055" ALLOWABLE CLEANUP .008", REPLACED CORRODED BROWNLINE AREA IAW B737 SRM 53102 FIG 7 REV 105 AND B737 SRM 53105 FIG 2 REV 105.

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