# NTSB LAX83FA446: Mortensen Lombard DILLEY-68, N301LS, Sun Valley, NV, September 17, 1983

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Field investigation · Final report
- Date: September 17, 1983, 11:15 local (18:15 UTC)
- Place: Sun Valley, NV
- Location: 39.6103° N, 119.7771° W: Placed by OpenAirDocs: center of Sun Valley, NV, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.6103&lon=-119.7771&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 23511
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX83FA446
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/23511/pdf
- Page: https://openairdocs.org/ntsb/LAX83FA446

## Sequence of events

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

- Loss of control - in flight, maneuvering
  - stall - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, maneuvering

## Analysis

THE PLT WAS ONE OF SEVERAL COMPETING IN A PYLON AIR RACE DURING THE RENO NATIONAL AIR RACES. THE ACFT WERE APPROACHING THE FIRST PYLON IN A STEEP LEFT BANK. ACCORDING TO THE PLT, ANOTHER ACFT PULLED IN FRONT OF HIM, & WHILE ATTEMPTING TO AVOID A COLLISION AT ABOUT 200 MPH, & WITH ONLY 35 FT OF ALTITUDE, THE ACFT STALLED & CRASHED.

## Aircraft

- Registration: [N301LS](https://openairdocs.org/deregistered/N301LS-1994-08-01), registration cancelled 1994-08-01, S/N 1 (OpenAirDocs)
- Reported make and model: MORTENSEN LOMBARD DILLEY-68 (LOMBARD DI)
- Registry model: [Mortensen Dan LOMBARD-DILLEY-68](https://openairdocs.org/model/mortensen-dan-lombard-dilley-68) (registry code 05608K5) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 1
- Airframe hours: 26
- Engines: LYCOMING IO-320-A2B 150 horsepower reciprocating
- Damage: Destroyed
- Flight: Part 91
- Registered owner: Ams/Air Corp.
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Unknown, September 11, 1983, 5 hours before
- Airport: 4SD, Reno-Stead

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; airline transport, flight instructor; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: center; flight hours: 1,944 total, 250 in this make and model, 1,703 as pilot in command, 20 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 20 knots
- Visibility: 40 statute miles
- Lowest ceiling: none
- Temperature: 81 °F, dew point 45 °F
- Altimeter: 30.00 inHg
- Observed at: RNO, 12 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 19830917050159A](https://openairdocs.org/incident/19830917050159A), Sep 17, 1983: Amtr DILLEY68, Sun Valley, NV, Destroyed. Stalled trying to avoid another race aircraft while rounding a pylon. Aircraft disintegrated on ground impact.

## Other investigations on N301LS (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 CHI83LA282](https://openairdocs.org/ntsb/CHI83LA282), Jun 13, 1983: Lombard Dilley 68 (N301LS), Camp Douglas, WI, substantial damage

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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