# SDR NOZR201906140001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 29, 2019
- Submitted: June 14, 2019
- Operation: General aviation
- Filed by: [Northrop Grumman Systems Corp., repair station NOZR888K](https://openairdocs.org/faa-repair-station/NOZR888K/northrop-grumman-systems-corp.md) (OpenAirDocs)
- Aircraft: [N77NG](https://openairdocs.org/aircraft/N77NG), registered now
- Make and model: Beech B300
- Registry model: [Beech B300](https://openairdocs.org/model/hawker-beechcraft-b300) (OpenAirDocs)
- Aircraft serial: FL1047
- Aircraft time: 2,153 hours, 5,063 cycles
- System (JASC): [5210 · Passenger/Crew Doors](https://openairdocs.org/jasc/5210)
- Part: Channel
- Part number: 504300431329
- Condition: Cracked
- Location: Pax Door
- Part time: 2,153 hours, 5,063 cycles
- Stage of operation: IN
- How discovered: B
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NOZR201906140001

## Discrepancy

DURING A ROUTINE POST FLIGHT INSPECTION, TWO RIVETS ON THE MAIN CABIN ENTRY DOOR WERE NOTED MISSING ALONG THE LOWER AFT CORNER.  UPON FURTHER INVESTIGATION, A SUBSTANTIAL CRACK WAS FOUND ON THE MAIN ENTRY DOOR FRAME CHANNEL.  THIS CHANNEL SUPPORTS THE HINGE FOR THE MAIN CABIN DOOR.  IT IS SUSPECTED THAT A WEAK DOOR DAMPER ASSEMBLY WAS PLACING UNDUE STRESS ON THE DOOR HINGE AND STRUCTURE AS IT WOULD SUDDENLY CATCH AND SLOW THE OPENING OF THE DOOR HALF WAY DOWN

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