# NTSB MKC85FA133: Hildebrand Spezio Sport DAL-1, N1141L, Gravois Mills, MO, June 17, 1985

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: June 16, 1985, 19:35 local (Jun 17, 1985, 00:35 UTC)
- Place: Gravois Mills, MO
- Coordinates: 38.300285, -92.820587 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.3003&lon=-92.8206&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 33841
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC85FA133
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33841/pdf
- Page: https://openairdocs.org/ntsb/MKC85FA133

## Sequence of events

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

- Loss of control - in flight, maneuvering
  - buzzing - performed, pilot in command (cause)
  - stall - inadvertent, pilot in command (cause)
- In flight collision with object, descent - uncontrolled
  - object - building(nonresidential)
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - water,glassy

## Analysis

WITNESSES REPORTED THAT THE ACFT MADE AT LEAST TWO COMPLETE CIRCLES OVER A COVE ON LAKE OF THE OZARKS AT LOW ALT. PART OF THE ACFT TRACK TOOK IT OVER THE SOUTHEAST SHORELINE WHERE SEVERAL LAKE HOMES ARE LOCATED. DURING THE THIRD CIRCLE, AS THE ACFT APPROACHED THE LAKE IN A RT TURN, THE RT WING DROPPED ABRUPTLY, THE ACFT DESCENDED AND HIT A COVERED BOAT DOCK. THE ACFT THEN FELL INTO THE LAKE BESIDE THE DOCK.

## Aircraft

- Registration: N1141L (not matched to a registry record)
- Reported make and model: HILDEBRAND SPEZIO SPORT DAL-1 (SPEZIO SPO)
- Category: Airplane, amateur-built
- Serial number: 85
- Airframe hours: 360
- Engines: LYCOMING O-290-G 125 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: Lee Mace
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, October 11, 1984, 9 hours before
- Departed: K15, OSAGE BEACH, MO

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 24; commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: front; toxicology performed; flight hours: 4,000 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 8 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 64 °F
- Altimeter: 29.00 inHg
- Observed at: COU, 42 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 19850616067699A](https://openairdocs.org/incident/19850616067699A), Jun 16, 1985: Amtrsp SPEZIOTUHOLE, Gravois Mills, MO, Destroyed. Collided with boat dock roof after low maneuvers in lake area, then impacted the water. PIC undetermined.

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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