# NTSB SEA90LA175: Mooney M-20E, N9067V, Cheyenne, WY, September 5, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 4, 1990, 20:45 local (Sep 5, 1990, 02:45 UTC)
- Place: Cheyenne, WY
- Coordinates: 41.140666, -104.790794 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.1407&lon=-104.7908&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 28, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 41270
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA90LA175
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41270/pdf
- Page: https://openairdocs.org/ntsb/SEA90LA175

## Probable cause

PILOT'S FAILURE TO EXTEND THE LANDING GEAR PRIOR TO LANDING AFTER HAVING BEEN DISTRACTED BY TRAFFIC. A MITIGATING FACTOR IN THIS ACCIDENT WAS THE FACT THAT THE GEAR WARNING HORN DID NOT FUNCTION.

## Sequence of events

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

- Gear not extended, landing
  - landing gear,gear warning system - inoperative (contributing factor)
  - wheels up landing - inadvertent, pilot in command (cause)

## Analysis

THE PILOT OF THE MOONEY M-20E LANDED GEAR-UP AFTER FAILING TO EXTEND THE LANDING GEAR AFTER BEING DISTRACTED BY OTHER AIR TRAFFIC. INVESTIGATION REVEALED THAT THE GEAR WARNING HORN WAS NOT FUNCTIONING.

## Aircraft

- Registration: [N9067V](https://openairdocs.org/aircraft/N9067V), registered now, S/N 690010 (OpenAirDocs)
- Reported make and model: MOONEY M-20E
- Registry model: [Mooney M20E](https://openairdocs.org/model/mooney-m20e) (registry code 5870212) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 690010
- Airframe hours: 2246
- Engines: LYCOMING IO-360-A1A 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Robert A. Sands
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, February 24, 1990, 103 hours before
- Airport: CYS, Cheyenne, runway 12, 6,691 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 51; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 486 total, 486 in this make and model, 353 as pilot in command, 56 in the last 90 days, 27 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/bright
- Wind: 140° at 6 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 68 °F, dew point 48 °F
- Altimeter: 30.00 inHg
- Observed at: CYS

## 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 19900904065679A](https://openairdocs.org/incident/19900904065679A), Sep 4, 1990: Mooney M20E, Cheyenne, WY, Substantial damage. Distracted by traffic landed gear up. Gear warning horn inoperative.

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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