# SDR 33AY2016FA0000053

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 6, 2016
- Submitted: February 5, 2016
- Operation: General aviation
- Aircraft: [N737CS](https://openairdocs.org/aircraft/N737CS), registered now
- Make and model: Boeing 737-2T4
- Registry model: [Boeing 737-2T4](https://openairdocs.org/model/boeing-737-2t4) (OpenAirDocs)
- Aircraft serial: 23272
- System (JASC): [5314 · Fuselage Main, Keel](https://openairdocs.org/jasc/5314)
- Part: Keelbeam
- Condition: Cut
- Location: Bs 668-672
- 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/33AY2016FA0000053

## Discrepancy

INSPECTION FOUND LT KEEL BEAM LOWER CHORD, LBL 6.30, CORRODED AND CRACKED BETWEEN BS 668 - 672.  THE KEEL BEAM LOWER CHORD WAS CUT AT BS 625 AND THE KEEL BEAM AFT SEGMENT WAS REMOVED AND THEN REPLACED WITH NEW PART BETWEEN BS 625-BS 727+16 IAW REPAIR PLAN NR 121083-R041, REV 02.

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