CEN16LA293 · Boam Larry RANS S 7
Boam Larry RANS S 7 · Accident: loss of control in flight during takeoff
From Wittman Regional Airport (OSH) to Ames Municipal Airport (AMW)
Event
- NTSB case
- CEN16LA293
- 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
Boam Larry RANS S 7
- Aircraft type
- Boam Larry RANS S 7
- 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
- N6271X
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Wittman Regional Airport (OSH), Oshkosh, WITo Ames Municipal Airport (AMW), Ames, IA
- Aircraft age
- About 19 years (built 1997)
- 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
- Takeoff
- 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
- Loss of control in flight
- 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
- Personnel issues › Task performance
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The sport pilot reported that during taxi before taking off for the airshow, he was trying to get the airplane set up for takeoff. Shortly after he began his takeoff roll and as he rotated the airplane, the airplane's nose pitched up into a high attitude. He applied forward pressure to the control stick, and the airplane began to drift to the left. Because the left side of the runway was bordered with airshow spectators, the pilot made an abrupt turn to the right, which resulted in an aerodynamic stall. Subsequently, the airplane impacted terrain on the west side of the runway and sustained substantial damage to the wing struts and fuselage.
The pilot stated that he felt rushed and anxious given the number of airplanes trying to land and take off.
Postaccident examination of the airplane revealed flight control continuity, and no preimpact mechanical failures or malfunctions were identified that would have precluded normal operation. Although the aft baggage compartment contained 10 lbs of baggage more than the maximum limit, according to weight and balance calculations, the airplane's takeoff weight was below the maximum, and the aft center of gravity was within normal limits.
The pilot had been diagnosed with Crohn's disease, low back pain, insomnia, and Parkinson's disease and was taking sleep-inducing medications at the time of the accident. Given the circumstances of the accident and the pilot's ability to recall events including the crash itself, it is unlikely that he suffered a sudden period of sleep induced by the medications. Further, it could not be determined if the pilot's medical issues contributed to the accident.
Probable cause
The pilot's failure to maintain airplane control on takeoff, which resulted in his remedial action to induce an aerodynamic stall and the subsequent impact with terrain.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CEN16LA293
- Event ID
- 20160730X20734
- Case number
- CEN16LA293
- 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: 89b579ea1381a5474220ce1b4115246a48fd2c3d12bef84dd2ec800525ffafb5; retrieved 2026-09-16T03:43:06.747Z.