CHI05LA113 · Mattson Zenith 601XL
Mattson Zenith 601XL · Accident: loss of engine power en route
From Waterloo Regional Airport (ALO) to Waterloo Regional Airport (ALO)
Event
- NTSB case
- CHI05LA113
- 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
Mattson Zenith 601XL
- Aircraft type
- Mattson ZENITH 601
- 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
- N824M
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Waterloo Regional Airport (ALO), Waterloo, IATo Waterloo Regional Airport (ALO)
- 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
- 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 › Planned approach, misjudged
- 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 airplane collided with a ditch during an off airport forced following a loss of engine power. The pilot reported that 15 minutes into the flight, the engine rpm started decreasing and he thought he smelled smoke in the cockpit. He reported that he turned off the battery switches and the engine rpm began to increase. The pilot reported he set the engine power to 2,500 rpm and began spiraling down over a private airstrip from an altitude of 4,500 feet above mean sea level (msl) when the engine lost all power. He stated he needed additional power to complete the last 360 degree turn so he elected to land in a field. The airplane struck a fence and a ditch during the landing. Inspection of the airplane and engine failed to reveal any mechanical failure/malfunction which would have resulted in a fire, smoke, or the loss of engine power. The engine was equipped with an electronic ignition system. The pilot reported the accident could have been avoided by making a "better landing on power off."
Probable cause
A loss of engine power for undetermined reasons and the pilot misjudged the forced landing approach. Factors associated with the accident were the fence and the ditch which the airplane contacted.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CHI05LA113
- Event ID
- 20050516X00616
- Case number
- CHI05LA113
- 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: ce2b69c430136962eab34741f4a99638eecf9bc3666f8326b5b724c8625fc9af; retrieved 2026-09-22T05:57:20.673Z.