GAA15CA090 · Piper PA 25-260
Piper PA 25-260 · Accident: controlled flight into terrain/object (CFIT) en route
From Casselton Robert Miller Regional Airport (5N8) to Casselton Robert Miller Regional Airport (5N8)
Event
- NTSB case
- GAA15CA090
- 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
- API-reported fatalities
- 0 · all aircraft and ground
- 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
Piper PA 25-260
- Aircraft type
- Piper PA-25
- 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
- N4793Y
- Operator
- William R. Dittmer · private individual
- Onboard fatalities
- Unknown
- Route
- From Casselton Robert Miller Regional Airport (5N8), Casselton, NDTo Casselton Robert Miller Regional Airport (5N8), Casselton, ND
- Aircraft age
- About 47 years (built 1968)
- 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 137: Agricultural
- 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
- Controlled flight into terrain/object (CFIT)
- Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
- Wire
- 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 › Aircraft oper/perf/capability
- Environmental issues › Physical environment
- Personnel issues › Psychological
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
During an interview with the Aviation Safety Inspector from the Federal Aviation Administration, the pilot told the inspector that he was heading back to the airport when he became distracted, looked down at the floor and then looked up just in time to see the wire.
The airplane struck power transmission line wires at about 73 feet above the ground. The left wing impacted the ground about 290 feet from the power transmission line wires in the direction of travel, resulting in substantial damage to the fuselage, both wings, and empennage.
The pilot reported no pre-impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.
Probable cause
The pilot's failure to monitor the flight environment for adequate terrain/obstacle clearance, which resulted in the inflight collision with power transmission line wires.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record GAA15CA090
- Event ID
- 20150527X02635
- Case number
- GAA15CA090
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
Source notes (4)
- 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. 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: c7080105121f6c9446bd2d0e38de5d888633802c5431ddd502b2b68e62a542ec; retrieved 2026-09-16T02:21:14.001Z.