# NTSB CHI87DEP10: Robinson Avid Flyer, N228MC, Tomah, WI, July 21, 1987

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: July 21, 1987, 18:00 local (23:00 UTC)
- Place: Tomah, WI
- Coordinates: 43.979553, -90.500106 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.9796&lon=-90.5001&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report April 24, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 13581
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI87DEP10
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13581/pdf
- Page: https://openairdocs.org/ntsb/CHI87DEP10

## Sequence of events

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

- Loss of control - in flight, approach - vfr pattern - base turn
  - in-flight planning/decision - improper, pilot in command (cause)
  - airspeed - not maintained, pilot in command (cause)
  - stall - inadvertent, pilot in command (cause)
  - lack of total experience in type of aircraft, pilot in command (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE HOMEBUILT, HIWING ACFT HAD JUST BEEN ASSEMBLED BY THE OWNER/PLT & WAS READIED FOR ITS 1ST FLT. AFTER TAKEOFF FROM RWY 25, THE ACFT ENTERED A CLIMB, TURNED BACK OVER THE ARPT & CROSSED OVER THE RWY. SUBSEQUENTLY, IT WAS MANEUVEREDABOUT 500 TO 800 FT SOUTH OF THE RWY, IN THE VICINITY OF A LEFT BASE TURN TO RWY 25. WHILE IN A LEFT TURN, THE BANK ANGLE INCREASED TO ABOUT 60 DEG & THE ACFT DESCENDED TO THE GROUND & CRASHED. IT STRUCK THE GROUND 486 FT SHORT OF RWY 25 ON A HDG OF 270 DEG. THE PLT WAS SERIOUSLY INJURED & COULD NOT REMEMBER DETAILS OF THE ACDNT. HE STATED HE COULD NOT GET FULL POWER FROM THE ENG. HOWEVER, NO SPECIFIC PROBLEMS WERE FOUND DURING AN EXAM OF THE ENG, EXCEPT THAT DEPOSITS IN THE FRONT CYLINDER WERE INDICATIVE OF A SLIGHTLY RICH FUEL MIXTURE.

## Aircraft

- Registration: [N228MC](https://openairdocs.org/deregistered/N228MC-1994-08-09), registration cancelled 1994-08-09, S/N 228 (OpenAirDocs)
- Reported make and model: ROBINSON AVID FLYER
- Registry model: [Robinson David B AVID FLYER](https://openairdocs.org/model/robinson-david-b-avid-flyer) (registry code 056129E) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: KIT #228
- Airframe hours: 1
- Engines: ROTAX 532 64 horsepower reciprocating
- Damage: Destroyed
- Flight: Part 91
- Registered owner: David B. Robinson
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Unknown, July 14, 1987, 3 hours before
- Airport: Y72, Bloyer Field, runway 24, 3,580 × 40 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 101 total, 74 as pilot in command, 3 in the last 90 days, 2 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 4 knots
- Visibility: 8 statute miles
- Lowest ceiling: none
- Temperature: 90 °F, dew point 66 °F
- Altimeter: 30.00 inHg
- Observed at: VOK, 11 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 19870721037889A](https://openairdocs.org/incident/19870721037889A), Jul 21, 1987: Amtr AVIDFLYER, Tomah, WI, Destroyed. Unable to get full power on climbout. Attempted to return but stalled on turn to final. Crashed. Initial flight.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.