# Incident 20240223002109I: Learjet Inc 45, Youngstown, OH, February 23, 2024

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: February 23, 2024, 16:40 local time
- Place: Youngstown, OH
- Damage: No damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Location: 41.0998° N, 80.6495° W: Placed by OpenAirDocs: center of Youngstown, OH, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.0998&lon=-80.6495&mi=10
- Aircraft: N1904S, registered now (https://openairdocs.org/aircraft/N1904S) (OpenAirDocs)
- Registry model: Learjet 45 (registry code 5170805, https://openairdocs.org/model/learjet-45) (OpenAirDocs)
- Registry engine: Alliedsign TFE731-60 (registry code 02504, https://openairdocs.org/engine/alliedsign-tfe731-60) (OpenAirDocs)
- Reported make and model: LEARJET INC 45
- Reported engine: ALLIEDSIGN TFE731-60
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Airline transport
- Pilot flight hours: 6,100 total
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20240223002109I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ON FEB. 23, AROUND 2:50 EST, AIRCRAFT DEPARTED CXO.  CREW STATED PREFLIGHT WAS UNREMARKABLE AND HYDRAULIC LIGHTS ON THE EXTERNAL PANEL SHOWED NORMAL. ABOUT 15 MINUTES IN TO THE FLIGHT CREW NOTED A WHITE CAS MESSAGE “MAIN HYD QTY LO” QHR ADVISED “MAIN HYDRAULIC QUANTITY IS LOW.”

AROUND 1.5 HOURS IN TO THE FLIGHT, CREW STARTED TO GET AN INTERMITTENT WHITE CAS MESSAGE OF “L/R HYD PUMP LOW”.  THAT EVENTUALLY BECAME STEADY.  QHR ADVISED “MONITOR MAIN HYDRAULIC PRESSURE”.  CREW DID THAT AND NOTED ONLY SMALL FLUCTUATIONS OF ABOUT 10 POUNDS.  THEN, THAT PROGRESSED TO AMBER CAS MESSAGE OF “MAIN HYD PRESS”.  THE QHR ADVISED TO MONITOR PRESSURE AND IF LOW, DESCEND TO 35,000 AND REFER TO MAIN HYDRAULIC SYSTEM FAILURE LANDING. CREW DID THAT.

IN THIS CONDITION, CREW MADE THE JUDGEMENT THAT IT WOULD BE GOOD TO HAVE FIRE AND RESCUE STANDING BY IN THE EVENT OF UNFORESEEN CONDITIONS AND RISK.

THE EMERGENCY BRAKE DID WORK, CREW STATED THAT THEY STOPPED USING IT ABOUT 4000 FOOT OF THE 9000 AVAILABLE.  ONCE STOPPED, CREW REQUESTED TO BE TOWED OFF THE RUNWAY, BECAUSE THERE WAS NO WAY TO KNOW IF FURTHER EMERGENCY BRAKING WOULD BE AVAILABLE FOR TAXI.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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