SEA07LA056 · Martin/Harris Harmon Rocket
Martin/Harris Harmon Rocket · Accident: loss of engine power on approach
From Sandy, OR to Portland Troutdale Airport (KTTD)
Event
- NTSB case
- SEA07LA056
- 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
Martin/Harris Harmon Rocket
- Aircraft type
- Martin/harris HARMON ROCKET
- 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
- N141RH
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Sandy, ORTo Portland Troutdale Airport (KTTD), Troutdale, 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
- 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 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
- Reason for occurrence undetermined
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The aircraft's engine started to run rough almost immediately after takeoff, but after switching fuel tanks and turning the boost pump on, the pilot was able to get it to run smoothly. Since he did not want to make his first landing in the recently purchased aircraft at the small field that he just departed from, he decided to fly to a larger airport that he thought was a little over five minutes away. As he neared the airport, the engine began to run only intermittently, and eventually stopped running altogether. Because he was unable to reach the airport, the pilot attempted a forced landing on a residential street. During the landing sequence the aircraft experienced a collapse of the main landing gear, and sustained further damage when it contacted the curb of the street. A post-accident inspection was unable to determine the cause of the power loss.
Probable cause
A total loss of power for undetermined reasons just as the aircraft was maneuvering to enter the downwind for landing. The absence of a suitable landing location was a factor in the accident.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record SEA07LA056
- Event ID
- 20070207X00149
- Case number
- SEA07LA056
- 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, coordinates. 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: 149ee5ca09b2cd7edb35e22d99862f231193ef59610bf79982682e3aada419ea; retrieved 2026-09-21T18:36:57.246Z.