# SDR ZESA2015072700003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 2015
- Submitted: July 27, 2015
- Operation: Air carrier
- Aircraft: N504LV
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5369
- Aircraft time: 4,082 hours, 3,559 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Switch
- Part number: S31771
- Condition: Not Seated
- Location: Pax Door
- Part time: 4,082 hours, 3,559 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ZESA2015072700003

## Discrepancy

SHORTLY AFTER TAKEOFF, THE MAIN CABIN DOOR UNLOCK LIGHT CAME ON, CHECKLIST WAS FOLLOWED & THE PILOT ELECTED TO RETURN TO BLOCK.  THEY LANDED WITHOUT INCIDENT.  THE DOOR ALONG WITH LATCHING SYS WERE INSPECTED BY AN A & P.  THE SYS WAS OPERATIONALLY CHECKED & THE DETERMINATION WAS THAT THE DOOR WAS NOT LATCHED AGGRESSIVELY ENOUGH TO COMPLETE THE LOCK MECHANISM FROM THE BEGINNING.  NO OTHER DEFECT NOTED.

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