DEN89LA049 · Piper PA-11
Piper PA-11 · Accident: loss of control in flight during initial climb
From No airport to Ryegate, MT (no airport)
Event
- NTSB case
- DEN89LA049
- 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
Piper PA-11
- Aircraft type
- Piper PA-11
- 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
- N5570H
- Operator
- Lemmon, Darrell C. · private individual
- Onboard fatalities
- Unknown
- Route
- From No airportTo Ryegate, MT (no airport)
- 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
- Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
- Stall
- 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 preflight, inadequate
- Pilot in command › Stall, inadvertent
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE PILOT WAS TAKING OFF FROM A FARM STRIP WITH A 10 KT HEAD WIND. THE PLT SAID THE SUN WAS SHINING AT THE TIME OF THE ACDT BUT THERE HAD BEEN SNOW SHOWERS IN THE AREA. HE SAID THE LIFTOFF WAS NORMAL BUT AT ABOUT 15 TO 18 FT AGL THE ACFT STALLED AND CRASHED. AFTER THE ACDT THE PLT FOUND A THIN LAYER OF ICE ON THE WINGS. HE SAID THE SUN PROBABLY MELTED SNOW ON THE WINGS, WHILE THE ACFT WAS PARKED, WHICH THEN FROZE DURING THE TAKEOFF. THE TEMP AT THE TIME OF THE ACDT WAS ESTIMATED TO BE 20-25 DEG F. THE PLT REPORTED HE HAD FLOWN 10 HRS IN THE PRECEDING 24.
Verbatim NTSB analysis from the NTSB dataset
Sources
NTSB record DEN89LA049
- Event ID
- 20001213X27415
- Case number
- DEN89LA049
- 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: 0ea103e3087009a961cc446eca79c5a38ffced96dbc15c9927e4a8069c4f84f7; retrieved 2026-09-23T08:07:14.332Z.