SEA98LA082 · Cessna 150L
Cessna 150L · Accident: loss of control in flight on approach
From Sandpoint Airport (SZT) to an unrecorded destination
Event
- NTSB case
- SEA98LA082
- 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 150L
- 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
- N1479Q
- Operator
- Loren R. Townsend · private individual
- Onboard fatalities
- Unknown
- Route
- From Sandpoint Airport (SZT), Sandpoint, IDTo not recorded
- 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
- Approach · VFR pattern downwind
- 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
- Pilot in command(cfi) › Incapacitation(loss of consciousness)
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The flight took off with approximately a 30-minute to 1-hour fuel supply. After takeoff, the pilot/flight instructor and dual student (on her first instructional flight) practiced airwork for approximately 15 minutes, then returned to the airport for touch-and-go landings. The flight instructor, who held an FAA medical certificate valid for third-class privileges at the time, reported that on the third touch-and-go pattern, while downwind, he lost consciousness. The dual student stated that while the instructor (her father) was piloting and speaking to her, the aircraft suddenly started heading for trees, and that she then shouted, 'What are you doing?!', but that the instructor did not respond. A witness reported that the airplane's engine sputtered and stalled as the airplane went into a steep left bank, and that it then crashed into the trees. FAA on-scene investigators found a very small quantity of fuel on board the aircraft, and the aircraft's propeller exhibited no evidence of significant engine power at impact. Records of the pilot's treatment at a local hospital following the accident contained discharge diagnoses of 'syncope prior to accident (probably related to atrial fibrillation)' and 'atrial fibrillation/junctional tachycardia.' The pilot/instructor reported that no mechanical failure or malfunction was involved in the accident.
Probable cause
Loss of consciousness by the pilot-in-command/flight instructor, resulting in loss of aircraft control and subsequent collision with terrain.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record SEA98LA082
- Event ID
- 20001211X10198
- Case number
- SEA98LA082
- 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: 067a1304e623b7fb09678ee27c11944a29070fd87f1927cc8d7e57c88f834472; retrieved 2026-09-21T11:31:28.748Z.