# SDR 2016F00126

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 16, 2016
- Submitted: May 20, 2016
- Operation: Air carrier
- Aircraft: [N405LA](https://openairdocs.org/aircraft/N405LA), registered now
- Make and model: Raythn HAWKER800XP
- Aircraft serial: 258726
- Aircraft time: 4,287 hours, 2,185 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Duct
- Part number: 258VF5651A
- Condition: Separated
- Location: Ac Bay
- Part time: 4,287 hours, 2,185 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2016F00126

## Discrepancy

AT CRUISE FLIGHT AT 41,000 FT HEARD A LOUD BANG & CABIN ALTITUDE WAS CLIMBING AT A RATE IN EXCESS OF 2000 FPM.  UPON INITIAL INSPECTION BY MX AFTER AN UNEVENTFUL LANDING, IT WAS DISCOVER THAT THE COOLING TURBINE EXIT DUCT PN 25-8VF565-1A HAD BECOME SEPARATED FROM THE COOLING TURBINE.  PART TIME IN SERVICE SINCE LAST MX WAS 2.2 HOURS & 1 LANDING.

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