WPR24LA048 · Flight Design Gmbh CTLS
Flight Design Gmbh CTLS · Accident: fuel exhaustion en route
From Great Falls International Airport (GTF) to Glacier Park International Airport (GPI)
Event
- NTSB case
- WPR24LA048
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- Event fatalities
- Unknown
- Ground fatalities
- Unknown
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Flight Design Gmbh CTLS
- Aircraft type
- Flight Design CTLS
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N924RD
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Great Falls International Airport (GTF), Great Falls, MTTo Glacier Park International Airport (GPI), Kalispell, MT
- Aircraft age
- About 7 years (built 2016)
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- En route · cruise
- Defining eventThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Fuel exhaustion
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Aircraft › Fluids/miscellaneous hardware
- Personnel issues › Action/decision
- Personnel issues › Task performance
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
About four hours into the repositioning flight, and about six miles from his intended destination, the pilot contacted the tower controller and was informed that the airport was under instrument flight rules (IFR) conditions, and that he was not cleared to land. The pilot made the decision to maneuver to the southeast to ascertain whether they should return to their home airport or land at a nearby airport and wait for the weather to clear. Shortly after departing the area enroute to an alternate airport, the airplane lost engine power. The pilot promptly attempted to restart the engine; however, his efforts were unsuccessful. The pilot subsequently executed a forced landing into a lake resulting in substantial damage to the fuselage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. He reported that there was no engine roughness or warnings before the engine quit, and it sounded as if the airplane ran out of fuel. He reported that he departed with 26.1 gallons of fuel and, according to the inflight computer, had about 5.72 gallons of remaining fuel when they arrived at the destination airport. In the recommendation section of the NTSB Accident/Incident Reporting Form 6120.1, the pilot listed ways that the accident could have been prevented, to include not relying on fuel management systems.
Probable cause
The pilot's inadequate fuel planning and improper in-flight decision-making, which resulted in a total loss of engine power due to fuel exhaustion.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record WPR24LA048
- Event ID
- 20231204193473
- Case number
- WPR24LA048
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
Source notes (5)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status, coordinates, cause areas. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: 66a4550b684b4cac5ae2be3de60eeff88bb46b57ace3f7213b65d1aa203e57a1; retrieved 2026-09-16T18:20:39.073Z.
- Corrected after a review of the NTSB narrative, which states these values explicitly: departure. Misspelled city; GTF is Great Falls International Airport, Great Falls, MT.