# SDR COEA0755821

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 4, 2007
- Submitted: January 7, 2008
- Operation: Air carrier
- Aircraft: [N821FX](https://openairdocs.org/aircraft/N821FX), registered now
- Make and model: Aerosp ATR 72 202
- Registry model: [Aerosp ATR 72 202](https://openairdocs.org/model/aerospatiale-atr-atr-72-202) (OpenAirDocs)
- Aircraft serial: 253
- Engine: Pwa PW127
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Part number: S5367800920002
- 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/COEA0755821

## Discrepancy

FOUND DURING HEAVY CHECK.  LEVEL 2 CORROSION: CABIN FLOOR SUPPORT STRUCTURES T-CHANNEL INTERCOSTALS ARE CORRODED BETWEEN STRINGERS 16 AND 17L AND STRINGERS 16 AND 17R, BETWEEN FLOOR BEAMS 36 TO 38 LT AND RT.  REMOVED AND REPLACED FLOOR SUPPORT STRUCTURES T-CHANNELS.  PN LT S5367800920002, RT S536780920102.  WO 72242, NR 200089, 91.  (K)

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