# NTSB CHI88DEP08: Monnett Sonerai II, N79TG, Wisc Rapids, WI, August 1, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: August 1, 1988, 13:00 local (18:00 UTC)
- Place: Wisc Rapids, WI
- Coordinates: 44.340019, -89.730438 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.3400&lon=-89.7304&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 July 3, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 13880
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI88DEP08
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13880/pdf
- Page: https://openairdocs.org/ntsb/CHI88DEP08

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, takeoff - initial climb
  - weather condition - temperature extremes (contributing factor)
  - fluid,fuel grade - other (contributing factor)
  - fluid,fuel - starvation (cause)
- Forced landing, descent - emergency
- In flight collision with terrain/water, landing
  - terrain condition - rough/uneven (contributing factor)

## Analysis

THE PLT RPRTD THAT DRG TAKEOFF, THE ENG LOST POWER AS THE ACFT WAS CLIMBING THRU ABOUT 200' AGL. AN EMERG LNDG WAS MADE IN THE BEST AVAILABLE AREA, WHICH WAS A GOLF COURSE ON ROLLING TERRAIN. DRG THE LNDG ROLL, THE PLT APPLIED BRAKES, BUT WAS UNABLE TO STOP BEFORE THE ACFT WENT OVER A RIDGE WITH A STEEP DECLINING SLOPE BEYOND. AS THE ACFT WENT OVER THE RIDGE (DROP-OFF), IT BECAME AIRBORNE, THEN TOUCHED DOWN HARD & WAS DAMAGED WHERE THE TERRAIN BEGAN RISING AGAIN. THE ACFT HAD BEEN SVCD WITH AUTO FUEL. THE PLT BELIEVED THE ENG HAD LOST POWER DUE TO VAPOR LOCK. ACCORDING TO AC 91-33,AUTO FUEL IS MORE SUSCEPTIBLE TO VAPOR LOCK AT ELEVATED TEMPS. THE TEMP WAS 93 DEG. NO OTHER PART MALFUNCTION OR FAILURE WAS EVIDENT.

## Aircraft

- Registration: [N79TG](https://openairdocs.org/deregistered/N79TG-2013-04-17), registration cancelled 2013-04-17, S/N 00109, built 1979 (OpenAirDocs)
- Reported make and model: MONNETT SONERAI II
- Registry model: [Garro Thomas D SONERAI II](https://openairdocs.org/model/garro-thomas-d-sonerai-ii) (registry code 05659G6) (OpenAirDocs)
- Registry engine: [Volkswagen CONVERSION](https://openairdocs.org/engine/volkswagen-conversion) (registry code 63501, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 00109
- Airframe hours: 412
- Engines: VOLKSWAGEN 1700 EV 60 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Bernard Fried
- Registered owner: Bernard S. Fired
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, July 29, 1988, 7 hours before
- Destination: OSH, OSHKOSH, WI
- Airport: Alexander Field, runway 29, 3,771 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 23; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: rear; flight hours: 955 total, 390 in this make and model, 869 as pilot in command, 133 in the last 90 days, 42 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 170° at 4 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 93 °F, dew point 66 °F
- Altimeter: 29.00 inHg
- Observed at: AUW, 40 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 19880801029239A](https://openairdocs.org/incident/19880801029239A), Aug 1, 1988: Amtrmo SONERAI2, Wisconsin Rapid, WI, Substantial damage. Engine failed on climbout. Crash landed on a golf course. High ambient temperature and auto fuel,suspect vapor lock

## Other investigations on N79TG (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 IAD01LA077](https://openairdocs.org/ntsb/IAD01LA077), Jul 6, 2001: Garro Sonerai II (N79TG), Cortland, OH, substantial damage. Probable cause: the pilot's failure to maintain directional control during an aborted take-off. A factor was the pilot's failure to obtain adequate take-off speed.

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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