# SDR 2011FA0000523

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 14, 2011
- Submitted: August 16, 2011
- Operation: Air carrier
- Aircraft: [N59JN](https://openairdocs.org/aircraft/N59JN), registered now
- Make and model: Cessna 525A
- Registry model: [Cessna 525A](https://openairdocs.org/model/cessna-525a) (OpenAirDocs)
- Aircraft serial: 525A0407
- Aircraft time: 793 hours, 620 cycles
- Engine: Wilint FJ44
- System (JASC): [5210 · Passenger/Crew Doors](https://openairdocs.org/jasc/5210)
- Part: Seal
- Part number: 551123073
- Condition: Loose
- Location: Pax Door
- Part time: 620 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2011FA0000523

## Discrepancy

ACFT CLIMBED TO FL200 AND HEARD A LOUD POP AND A LOUD RUSH OF AIR COMING FROM MAIN CABIN DOOR. STARTED TO SEE A DROP IN CABIN PRESSURE, PILOTS THEN DESCENDED AND DIVERTED BACK TO ORIGINATING AIRPORT.  PILOTS DID DECLARE AN EMERGENCY, ACFT LANDED WITH NO PROBLEMS. WE ISSUED A SPECIAL FLIGHT PERMIT AND FLEW TO SEVICE CENTER, REPAIRS MADE AT SERVICE CENTER.  APPEARED THAT THE SEAL PULLED OUT OF CHANNEL.

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