SEA01LA154 · Republic RC-3
Republic RC-3 · Accident: total loss of engine power (mechanical failure) en route
From Orcas Island, WA to AUO · Aurora, OR
Event
- NTSB case
- SEA01LA154
- 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
Republic RC-3
- Aircraft type
- Republic RC-3
- 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
- N6755K
- Operator
- Richardson, Gordon P. · private individual
- Onboard fatalities
- Unknown
- Route
- From Orcas Island, WATo AUO · Aurora, OR
- 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 · 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
- Total loss of engine power (mechanical failure)
- 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
- Ignition system, ignition lead › Other
- Ignition system, magneto › Other
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
After conducting a satisfactory pre-takeoff run-up check of both the right magneto and left coil ignition system, the pilot departed for his destination. Approximately 30 minutes into the flight the engine began to run rough and the pilot determined that the right magneto was not operating. He then selected the left ignition and, although the engine initially continued to run roughly, eventually all power was lost. The pilot selected an open field used by a farmer to operate his Cessna 177 in and out of due to the non-availability of any other adequate landing site. As he maneuvered through a 180 degree turn toward the landing area, he noted a 1,000-foot/minute rate of descent, which was greater than he had anticipated. The landing gear had been extended and as the aircraft was maneuvered onto a short final, the right main landing gear struck a cow. The aircraft yawed into a left skid, contacted the ground and skidded through a barbwire fence. Post-crash examination revealed that the right magneto had grounded internally resulting in its failure to operate. Additional testing revealed the left coil ignition system had also grounded internally as evidence by arcing, and it too, had failed.
Probable cause
An internal ground in the right magneto followed by an internal ground evidenced by arcing in the left ignition coil unit, which led to failure of both the right magneto and the left coil ignition system respectively during cruise. Contributing factors were a cow impacted by the right main landing gear and the pilot's unanticipated higher than expected rate of descent during the 180 degree descending turn to final.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record SEA01LA154
- Event ID
- 20010820X01732
- Case number
- SEA01LA154
- 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: 292db55ec11560bd6fa207298f97fd21121b478e8b401845e69f234e9a6865dc; retrieved 2026-09-22T11:39:28.284Z.