# NTSB ATL90DKG06: Prosser Mono FLY, N7016M, Cartersville, GA, August 5, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: August 5, 1990, 11:30 local (15:30 UTC)
- Place: Cartersville, GA
- Coordinates: 34.159828, -84.800018 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.1598&lon=-84.8000&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 29, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 8083
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL90DKG06
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/8083/pdf
- Page: https://openairdocs.org/ntsb/ATL90DKG06

## Probable cause

THE PILOT/BUILDER'S FAILURE TO ENSURE THAT THE SUBSTITUTED CONTROL STICK WAS ADEQUATELY ATTACHED TO THE AILERON BELL CRANK.

## Sequence of events

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

- Loss of control - in flight, landing - flare/touchdown
  - flt control syst,aileron control - sheared (cause)
  - acft/equip,inadequate aircraft component, manufacturer (cause)
- In flight collision with terrain/water, takeoff - aborted

## Analysis

THE PILOT HAD COMPLETED SEVERAL TOUCH & GO LANDINGS. DURING THE LAST LANDING, THE RIGHT WING WAS LIFTED BY A CROSSWIND GUST. RIGHT AILERON WAS APPLIED WITHOUT EFFECT. SINCE THE AIRPLANE WAS IN THE LANDING FLARE, THE AIRSPEED WAS TOO SLOW FOR RUDDER EFFECTIVENESS. FULL POWER HAD ALREADY BEEN APPLIED FOR THE GO-AROUND, SO THE AIRPLANE VEERED LEFT. THE LEFT WHEEL STRUCK A BERM WHICH CATAPULTED THE AIRPLANE ONTO ITS NOSE. THE OWNER/BUILDER SUBSEQUENTLY FOUND THAT THE CONTROL STICK HAD SEPARATED FROM THE AILERON BELLCRANK. HE HAD SUBSTITUTED THE STICK FOR THE CONTROL WHEEL, ATTACHING THE AILERON BELLCRANK TO THE STICK WITH RIVETS. THE RIVETS HAD SHEARED WHICH RESULTED IN A LOSS OF AILERON CONTROL.

## Aircraft

- Registration: [N7016M](https://openairdocs.org/deregistered/N7016M-1990-09-04), registration cancelled 1990-09-04, S/N MWP02 (OpenAirDocs)
- Reported make and model: PROSSER MONO FLY
- Registry model: [Prosser Michael W TEMAN MONOFLY](https://openairdocs.org/model/prosser-michael-w-teman-monofly) (registry code 0565767) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: MWP-02
- Airframe hours: 6
- Engines: ROTAX 503 54 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Michel W. Prosser
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, August 22, 1989, 6 hours before
- Departed: 6A0
- Airport: 6AO, Cartersville, runway 18, 4,000 × 60 ft, macadam

## 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: front; flight hours: 263 total, 6 in this make and model, 230 as pilot in command, 2 in the last 90 days, 1 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 15 knots, gusting 20
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 81 °F, dew point -0 °F

## 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 19900805030259A](https://openairdocs.org/incident/19900805030259A), Aug 5, 1990: Amtr MONOFY, Carterville, GA, Substantial damage. Trying to land in gusty crosswind,tried to raise low wing near stall. Rivets sheared on aileron bellcrank.

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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