# NTSB CHI87LA137: Aircoupe A-2-DEX, N6509Q, Iola, WI, May 31, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 31, 1987, 11:00 local (16:00 UTC)
- Place: Iola, WI
- Coordinates: 44.49942, -89.120773 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.4994&lon=-89.1208&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 7, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 13771
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI87LA137
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13771/pdf
- Page: https://openairdocs.org/ntsb/CHI87LA137

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, takeoff - initial climb
  - miscellaneous - undetermined (cause)
  - operation with known deficiencies in equipment - intentional, pilot in command (cause)
  - judgment - poor, pilot in command (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - soft (contributing factor)

## Analysis

THE AIRCRAFT EXPERIENCED A LOSS OF ENGINE POWER SHORTLY AFTER TAKEOFF AND WAS FORCED TO MAKE AN EMERGENCY LANDING NEXT TO THE RUNWAY. ON LANDING ROLL THE NOSE WHEEL OF THE AIRCRAFT STUCK IN THE GROUND, FLIPPING THE AIRCRAFT OVER ONTO ITS BACK. ACCORDING TO A PASSENGER ON AN EARLIER FLIGHT, THE AIRCRAFT HAD EXPERIENCED AN ENGINE FAILURE ON THE EARLIER FLIGHT, BUT LANDED SAFELY ON THE REMAINING RUNWAY. THERE WAS NO EVIDENCE FOUND OR PROVIDED BY THE PILOT TO SHOW THAT ANY CORRECTIVE MAINTENANCE WAS PERFORMED TO CORRECT OR DETERMINE THE CAUSE OF THE PREVIOUS ENGINE FAILURE.

## Aircraft

- Registration: [N6509Q](https://openairdocs.org/deregistered/N6509Q-1989-12-06), registration cancelled 1989-12-06, S/N A109 (OpenAirDocs)
- Reported make and model: AIRCOUPE A-2-DEX
- Registry model: [Alon A2](https://openairdocs.org/model/alon-a2) (registry code 0540102) (OpenAirDocs)
- Category: Airplane
- Serial number: A-109
- Airframe hours: 2030
- Engines: CONTINENTAL C-90 45 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: R.H. Stevenson
- Airworthiness certificate: Standard, Normal
- Departed: 68C
- Airport: 68C, Central County, runway 22, 2,600 × 100 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 49; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 553 total, 30 in this make and model, 40 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 8 knots
- Visibility: 20 statute miles
- Lowest ceiling: 20,000 ft overcast
- Altimeter: 29.00 inHg
- Observed at: AUW

## 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 19870531017449A](https://openairdocs.org/incident/19870531017449A), May 31, 1987: Univar A2ALON, Iola, WI, Substantial damage. Engine quit at 30 to 40 feet on takeoff. Aircraft stalled . Hit runway. Stopped inverted. Prior engine problems.

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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