SEA98LA066 · Ercoupe (Eng & Research Corp.) 415-D
Ercoupe (Eng & Research Corp.) 415-D · Accident: loss of control in flight during initial climb
From M46 to an unrecorded destination
Event
- NTSB case
- SEA98LA066
- 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
Ercoupe (Eng & Research Corp.) 415-D
- Aircraft type
- Ercoupe (eng Research 415
- 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
- N2777H
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From M46To 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 weight and balance, excessive
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The pilot reported that on takeoff, immediately after becoming airborne, the airplane banked left and 'I fought for control.' The pilot reported the airplane then 'apparently veered to the north of the runway', then 'seemed to begin to climb [and] then we were down.' The airplane impacted the ground and came to rest about halfway down the runway, to the north (right side) of the runway. Based on aircraft, occupant and fuel weights reported by the pilot, the airplane was computed to be approximately 52.5 pounds (4%) above maximum gross weight at takeoff. Based on reported temperature of 72 degrees F and field elevation of 3,426 feet, density altitude was estimated at approximately 5,000 feet at the time. At this combination of pressure altitude and temperature, the airplane's Continental C75 engine is capable of producing approximately 65 brake horsepower (BHP), approximately 13% less than its sea-level rating of 75 BHP.
Probable cause
The pilot's operation of the aircraft above maximum gross weight, resulting in her inability to attain a sustained climb rate after becoming airborne. A factor was high density altitude conditions.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record SEA98LA066
- Event ID
- 20001211X09962
- Case number
- SEA98LA066
- 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: 3210c5d5180649911e032cda893baef6b0a7446fe9eb285a59df579b79081b2e; retrieved 2026-09-21T20:51:52.399Z.