# NTSB CHI85FEP02: Neyman-Pietenpol GN-2, N13708, Brodhead, WI, July 25, 1985

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: July 25, 1985, 09:20 local (14:20 UTC)
- Place: Brodhead, WI
- Coordinates: 42.609409, -89.369812 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.6094&lon=-89.3698&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12886
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI85FEP02
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12886/pdf
- Page: https://openairdocs.org/ntsb/CHI85FEP02

## Sequence of events

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

- Loss of control - in flight, maneuvering
  - maneuver - performed, pilot in command
  - airspeed - not maintained, pilot in command (cause)
  - stall/spin - inadvertent, pilot in command (cause)
  - remedial action - initiated, pilot in command
- In flight collision with object, descent - uncontrolled
  - object - tree(s) (contributing factor)

## Analysis

THE ACFT WAS OBSERVED MAKING STEEP TURNS AT ABOUT 500 FT AGL JUST PRIOR TO THE ACDNT. ONE WITNESS STATED THAT THE AIRSPEED WAS DECAYING DURING THESE TURNS & THE ACFT STALLED WHILE IN A STEEP BANK. REPORTEDLY, THE ACFT BEGAN SPINNING, THEN THE PLT STOPPED THE SPIN & WAS RECOVERING IN A WINGS LEVEL ATTITUDE WHEN THE PLANE COLLIDED WITH TREES. THE ENG WAS AT FULL POWER WHEN THE ACFT CONTACTED THE TREES.

## Aircraft

- Registration: [N13708](https://openairdocs.org/deregistered/N13708-2013-08-08), registration cancelled 2013-08-08, S/N 305, built 1983 (OpenAirDocs)
- Reported make and model: NEYMAN-PIETENPOL GN-2
- Registry model: [Neyman Merle H PIETENPOL AIRCAMPER](https://openairdocs.org/model/neyman-merle-h-pietenpol-aircamper) (registry code 7040363) (OpenAirDocs)
- Registry engine: [Continental A&C65 series](https://openairdocs.org/engine/continental-a-c65-series) (registry code 17003, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 305
- Airframe hours: 250
- Engines: FRANKLIN 4AC-17G-BA-2 65 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: Merle H. Neyman
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, September 30, 1984, 40 hours before
- Airport: C37, Brodhead, runway 21, 1,520 ×  ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 64; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: rear; flight hours: 2,511 total, 250 in this make and model, 21 in the last 90 days, 15 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 9 statute miles
- Lowest ceiling: none
- Temperature: 73 °F, dew point 63 °F
- Altimeter: 30.00 inHg
- Observed at: JVL, 18 nm away

## 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 19850725036389A](https://openairdocs.org/incident/19850725036389A), Jul 25, 1985: Amtrpl AIRCAMPER, Brodhead, WI, Substantial damage. Collided with trees after aircraft entered a spin at low altitude. Pilot was making steep turns around airport.

## Other investigations on N13708 (1)

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.

- [NTSB DFW06CA059](https://openairdocs.org/ntsb/DFW06CA059), Jan 20, 2006: Pietenpol Aircamper (N13708), Lometa, TX, substantial damage. Probable cause: The pilot's failure to maintain directional control while landing. Contributing factors were the sun glare and the rough and uneven landing area.

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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