# SDR MJYA20180522001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 20, 2018
- Submitted: May 22, 2018
- Operation: Air carrier
- Aircraft: [N783TW](https://openairdocs.org/aircraft/N783TW), registered now
- Make and model: Doug DC-9-15F
- Registry model: [Doug DC-9-15F](https://openairdocs.org/model/mcdonnell-douglas-dc-9-15f) (OpenAirDocs)
- Aircraft serial: 45826
- Aircraft time: 50,619 hours, 58,495 cycles
- Engine: Pwa JT8D7B
- Engine time: 47,089 hours, 47,238 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Clamp
- Part number: 41029005
- Condition: Loose
- Location: Duct
- Part time: 50,618 hours, 58,495 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MJYA20180522001

## Discrepancy

DURING CRUISE ALTITUDE 35.0, THE AIRCRAFT STARTED LOSING PRESSURIZATION AND THE CABIN ALTITUDE CLIMBED TO 11.5 K FEET. THE PILOT DECLARED AN EMERGENCY AND DECENDED TO 10K FEET,  LANDED WITHOUT INCIDENT.  FOUND A DUCT CLAMP LOOSE.

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