# SDR CWQR20110915021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 15, 2011
- Submitted: October 6, 2011
- Operation: Air carrier
- Aircraft: [N565QS](https://openairdocs.org/aircraft/N565QS), registered now
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605818
- Aircraft time: 2,359 hours
- System (JASC): [5532 · Vertical Stabilizer, Plate/Skin](https://openairdocs.org/jasc/5532)
- Part: Skin
- Part number: 6120405
- Condition: Damaged
- Location: Vertical Stab
- 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/CWQR20110915021

## Discrepancy

DURING A SCHEDULED INSPECTION, FOUND 2 FASTENERS MISSING FROM THE LT SIDE OF THE DORSAL FIN ASSY. UPON FURTHER INSPECTION, FOUND THE FRESH AIR DUCT ASSY TO BE CRACKED IN 2 PLACES. IT APPEARS THAT THE CRACKED DUCT ASSY ALLOWED AIR PRESSURE TO EXPAND THE DORSAL FIN AND EVENTUALLY PULL THE RIVETS FROM THE LT SIDE DORSAL FIN SKIN.

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