# SDR 5SNA202606250542

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 24, 2026
- Submitted: June 26, 2026
- Operation: Air carrier
- Aircraft: [N501N](https://openairdocs.org/aircraft/N501N), registered now
- Make and model: Amd FALCON2000EX
- Aircraft serial: 103
- Aircraft time: 5,664 hours, 3,331 cycles
- Engine: Pwc PW308C
- Engine time: 5,357 hours, 3,065 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Power Loss
- Location: Nr 1
- Stage of operation: CR
- How discovered: O
- Nature of condition: X, E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/5SNA202606250542

## Discrepancy

AIRCRAFT AT CRUISE ALTITUDE, FL450, JUST WEST OF THE ROCKY MOUNTAINS WHEN WE ENCOUNTERED EITHER CLEAR-AIR TURBULENCE OR MOUNTAIN WAVE. WE OBSERVED THE AIRSPEED SLOWLY DECREASING, FOLLOWED BY THE AUTOTHROTTLES DISENGAGING. THEN WE OBSERVED THAT NR 1 ENG EXPERIENCED A ROLLBACK, FADEC HAD ENGAGED THE IGNITION ON THE NUMBER 1 ENGINE. THE PIC THEN SELECTED IGN FOR BOTH ENGINES USING THE IGNITION SELECTOR AS WE INITIATED A DESCENT AND UPON OBSERVING ITT HAD INCREASED ON NR 1 ENG TO 922C WE ELECTED TO SHUT DOWN NR 1 ENG IAW THE APPLICABLE PROCEDURES. DURING THE DESCENT THROUGH FL340,  STARTED THE APU, IT OPERATED NORMALLY. DIVERTED TO KLNK,  CONTINUED DESCENDING TO FL240 & COMPLETED THE ENG NR 1 RESTART PROCEDURE USING THE ABNORMAL PROCEDURES CHECKLIST. THE RESTART WAS SUCCESSFUL. FOLLOWING STARTER CUTOUT, MONITORED ENGINE NR 1 VIBRATION AND ITT, BOTH OF WHICH WERE INITIALLY WITHIN NORMAL OPERATING LIMITS. THE ENGINE NR 1 VIBRATION INDICATION INCREASED FROM APPROXIMATELY 0.12 AND CONTINUED TO RISE STEADILY TO 0.80 AT WHICH POINT, ELECTED TO SHUTDOWN & SECURE ENG NR 1 A SECOND TIME. DECLARED AN EMERGENCY & CONTINUED TO KLNK WHERE THERE WAS MAINT ON THE FIELD.  ARCFT LANDED WITHOUT FURTHER INCIDENT. THERE WERE 5 SOULS ON BOARD AND APPROXIMATELY 90 MINUTES OF FUEL REMAINING AT LANDING.

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