# NTSB MKC88DCD02: Prairie Flyers Tierra II, N823PF, Prairie City, IA, August 7, 1988

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: August 6, 1988, 19:17 local (Aug 7, 1988, 00:17 UTC)
- Place: Prairie City, IA
- Coordinates: 41.590854, -93.230781 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.5909&lon=-93.2308&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious
- Status: Completed, report September 11, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 34455
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC88DCD02
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34455/pdf
- Page: https://openairdocs.org/ntsb/MKC88DCD02

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(partial) - mech failure/malf, landing - aborted
  - in-flight planning/decision - improper, pilot in command (cause)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
  - terrain condition - rough/uneven (contributing factor)
  - aborted landing - attempted, pilot in command
  - throttle/power control - improper use of, pilot in command (cause)
- Loss of control - in flight, takeoff - initial climb
  - object - wire,transmission (contributing factor)
  - pull-up - excessive, pilot in command (cause)
  - stall - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE PILOT WAS ATTEMPTING TO LAND IN A HAYFIELD AND DECIDED TO ABORT THE LANDING DUE TO ROUGH CONDITION OF FIELD. AS HE PUSHED THE THROTTLE FORWARD, THE ENGINE FALTERED AND THE PLANE TOUCHED DOWN. THE ABORTED LANDING WAS CONTINUED DUE TO SPEED AND OBSTRUCTIONS. AS HE CLEARED POWER LINES, THE PLANE BEGAN A STEEP UNCONTROLLED DESCENDING RIGHT TURN AND HIT THE GROUND. THE ENGINE WAS RUNNING AT FULL POWER AT THE TIME OF THE STALL AFTER THE SHORT HESITATION IN POWER AT THE BEGINNING OF THE ABORT, ACCORDING TO THE PILOT.

## Aircraft

- Registration: [N823PF](https://openairdocs.org/deregistered/N823PF-1994-07-23), registration cancelled 1994-07-23, S/N 823804 (OpenAirDocs)
- Reported make and model: PRAIRIE FLYERS TIERRA II
- Registry model: [Prairie Flyers TIERRA II](https://openairdocs.org/model/prairie-flyers-tierra-ii) (registry code 0567612) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 823-804
- Airframe hours: 98
- Engines: ROTAX 532 65 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Galen Lee Heyveld
- Registered owner: Hayveld, Galen L.
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, October 1, 1987, 26 hours before
- Departed: OXV, KNOXVILLE, IA
- Airport: Farm Field

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 74 total, 21 in this make and model, 74 as pilot in command, 45 in the last 90 days, 24 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 0° at 5 knots
- Visibility: 15 statute miles

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19880806031039A](https://openairdocs.org/incident/19880806031039A), Aug 6, 1988: Amtrte TIERRA2, Prairie City, IA, Destroyed. Tried to land in a hayfield. Too rough, began a go around and stalled after clearing wires. Near vertical impact.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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