# NTSB CHI88DEP09: Eaa Acro II, N9EA, Fond Du Lac, WI, August 9, 1988

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: August 9, 1988, 17:20 local (22:20 UTC)
- Place: Fond Du Lac, WI
- Coordinates: 43.770057, -88.439216 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.7701&lon=-88.4392&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report July 3, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 13881
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI88DEP09
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13881/pdf
- Page: https://openairdocs.org/ntsb/CHI88DEP09

## Sequence of events

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

- Loss of engine power, climb
  - fuel system - undetermined (cause)
  - fluid,fuel - starvation (cause)
- Forced landing, descent - emergency
- In flight collision with terrain/water, landing - flare/touchdown
  - terrain condition - rough/uneven (contributing factor)

## Analysis

THE PLT RPRTD THAT AFTER REACHING CRUISE ALT, THE ENG BEGAN TO RUN ROUGH & SUBSEQUENTLY LOST POWER. HE MADE AN EMERG LANDING IN A DRY CULTIVATED FIELD. DRG THE LANDING, THE GEAR COLLAPSED & THE ACFT WAS SUBSTANTIALLY DAMAGED. THE FUEL TANK WAS EQUIPPED WITH A WEIGHTED 'FLOP' TUBE FOR AEROBATIC FLT. THE FLOP TUBE WAS KINKED, BUT THERE WAS EVIDENCE THE KINK OCCURRED DRG THE CRASH LANDING. ALSO, THERE WAS 4.5 FT OF EXPOSED & UNINSULATED FUEL LINE FORWARD OF THE FIREWALL. BEFORE THE FLT, THE 'HEAT SOAKED' ENG WAS DIFFICULT TO START WITH AN AIR TEMP OF 85 DEG, POSSIBLY FROM VAPOR LOCK.

## Aircraft

- Registration: [N9EA](https://openairdocs.org/aircraft/N9EA), registered now, S/N P-12, built 1978 (OpenAirDocs)
- Reported make and model: EAA ACRO II
- Registry model: [Eaa Air Museum Foundation ACRO II](https://openairdocs.org/model/eaa-air-museum-foundation-acro-ii) (registry code 0564686) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: P-12
- Airframe hours: 201
- Engines: LYCOMING O-360-A2A 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Louis B. Judy
- Registered owner: Eaa Aviation Foundation, Inc.
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, March 2, 1988, 3 hours before
- Departed: FLD, FOND DU LAC, WI
- Destination: FLD

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 54; airline transport, flight engineer; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: rear; flight hours: 20,000 total, 150 in this make and model, 12,000 as pilot in command, 250 in the last 90 days, 40 in the last 30 days, 20 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 5 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 81 °F, dew point 64 °F
- Altimeter: 29.00 inHg
- Observed at: OSH, 10 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 19880809032359A](https://openairdocs.org/incident/19880809032359A), Aug 9, 1988: Amtrso ACRODUSTER2, Fond Du Lac, WI, Substantial damage. Engine quit on local flight. Beleive uninsulated heat soaked fuel line caused vapor lock blocking fuel.

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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