SEA97LA069 · Gulfstream American AA-5A
Gulfstream American AA-5A · Accident: loss of engine power en route
From Southwest Oregon Regional Airport (OTH) to 2Q3 · YOLO COUNTY, CA
Event
- NTSB case
- SEA97LA069
- 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
Gulfstream American AA-5A
- Aircraft type
- Gulfstream American AA-5
- 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
- N26848
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Southwest Oregon Regional Airport (OTH), ORTo 2Q3 · YOLO COUNTY, CA
- 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
- En route · climb to cruise
- 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 engine power
- 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 › Remedial action, not performed
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The pilot flew into forecast icing conditions, where structural ice accumulated on the induction air filter and partially blocked the flow of induction air. He failed to apply carburetor heat, which would have bypassed the obstructed filter, and therefore the aircraft lost power and the pilot had to ditch the aircraft in the waters of Coos Bay.
Probable cause
The pilot's failure to perform the proper remedial action of applying carburetor heat/alternate induction air after impact ice accumulated on his aircraft's induction air filter. Factors include intentional flight into known adverse weather (icing conditions), ice formation on the induction air filter and the resultant restriction of the induction air flow, and a body of water at the location where the pilot had to attempt an emergency landing.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record SEA97LA069
- Event ID
- 20001208X07628
- Case number
- SEA97LA069
- 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: local date, investigation status. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 1997-03-12.
- API snapshot SHA-256: 49360e0e2a1c393a095d13ca5239ca63d75c5e6590a1c4506af07b2ca92e3544; retrieved 2026-09-22T20:14:09.621Z.