LAX98LA147 · Schweizer SGS-1-35
Schweizer SGS-1-35 · Accident: loss of control in flight during initial climb
Event
- NTSB case
- LAX98LA147
- 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
Schweizer SGS-1-35
- Aircraft type
- Schweizer SGS-1
- Category
- Glider
- 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
- N34187
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From not recordedTo 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
- Initial climb
- 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 › Aircraft control, not maintained
Approximate · Estimated position: the centre of Maricopa, AZ, the place the record names. Not the accident site.
NTSB narrative
The pilot towing the glider reported that after takeoff, the glider veered to the right. The tow plane yawed hard to the left and the towrope snapped while at an altitude of approximately 700 feet agl. Witnesses reported that as the glider pilot attempted to return to the airport to land, it impacted a ditch that ran between the two runways. Rescue workers reported that the pilot was incoherent and they suspected that he had suffered a stroke. One witness reported that the pilot had medical problems that prohibited him from flying more than 2 hours at a time. The pilot did not possess a medical certificate, nor is he required to. The pilot spent approximately 1 month in the hospital and has no memory of the accident. His wife was unable to find any aircraft or pilot logbooks. The pilot's family sold the glider and no further examination was possible.
Probable cause
The pilot's loss of control in flight for undetermined reasons.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX98LA147
- Event ID
- 20001211X09898
- Case number
- LAX98LA147
- 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: 2688e3ad78d254c470f3924da4731da9f227018149265c1c9e556d7c6aa8e980; retrieved 2026-09-21T11:33:41.254Z.