CHI99LA299 · Cessna 150G
Cessna 150G · Accident: loss of control in flight during landing
From 5G9 to Air Evac 97 Heliport (68OH)
Event
- NTSB case
- CHI99LA299
- 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
- 0
- 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
Cessna 150G
- Aircraft type
- Cessna 150
- 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
- N4061J
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From 5G9To Air Evac 97 Heliport (68OH), STONY RIDGE, OH
- Aircraft age
- Not recorded
- 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
- Landing
- First occurrenceThe 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
- Flight control, gust lock › Not removed
- Pilot in command › Aircraft preflight, inadequate
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The airplane nosed over during a precautionary landing to runway 27. In his written statement, the pilot said that he failed to remove the aileron gust lock that was installed between the right aileron and flap. The pilot stated that he noticed that the gust lock was still installed when he made his first left turn after takeoff. The pilot said that he was able to make shallow turns and that on final approach, he, '...thru habit...', started to extend the flaps at which time the aircraft '... veered left in spite of reversing the flaps.' The pilot stated that he then was able to level the wings of the airplane but the '...nose wheel sank in the soft ground and the plane went over on its back.' The pilot did not report any preexisting mechanical discrepancies with respect to the accident airplane. The airplane came to rest in the soft farm field adjacent to the runway. A postaccident examination of the aircraft revealed no anomalies that could be associated with a preexisting condition.
Probable cause
the inadequate aircraft preflight by the pilot and the pilot's failure to remove the aileron gust lock before flight. Factors to the accident were the soft terrain adjacent to the runway and the collapse of the nose gear.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CHI99LA299
- Event ID
- 20001212X19449
- Case number
- CHI99LA299
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
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: 2cad4eeed6be7cc3236bc6ca797f299bf5c7d145aa5520bbafea4403276d48e3; retrieved 2026-09-21T20:26:00.267Z.