# SDR 2011FA0000188

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2011
- Submitted: March 21, 2011
- Operation: General aviation
- Aircraft: [N321CK](https://openairdocs.org/aircraft/N321CK), registered now
- Make and model: Diamon DA 40
- Registry model: [Diamon DA 40](https://openairdocs.org/model/diamond-aircraft-ind-da-40) (OpenAirDocs)
- Aircraft serial: 40414
- Aircraft time: 1,800 hours
- System (JASC): [5210 · Passenger/Crew Doors](https://openairdocs.org/jasc/5210)
- Part: Latch
- Condition: Disengaged
- Location: Cabin Door
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2011FA0000188

## Discrepancy

THE ACFT WAS CONFIGURED FOR CRUISE FLIGHT AT 3500FT.  THE STUDENT WAS INSTRUCTED TO REDUCE AIRSPEED TO MCA.  AT ROUGHLY 90 KTS AIRSPEED, THE INSTRUCTOR HEARD A POPPING NOISE FROM BEHIND AND WITNESSED THAT THE PRIMARY LATCH FOR THE REAR DOOR HAD COME OPEN 50 PERCENT.  HE RE-ENGAGED THE LATCH AND LANDED WITHOUT INCIDENT.

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