# NTSB MIA84LA244: Mooney M20J, N1143Z, Key Largo, FL, September 1, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 1, 1984, 09:30 local (13:30 UTC)
- Place: Key Largo, FL
- Coordinates: 25.079896, -80.43991 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=25.0799&lon=-80.4399&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 31186
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA84LA244
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/31186/pdf
- Page: https://openairdocs.org/ntsb/MIA84LA244

## Sequence of events

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

- Overrun, landing - roll
  - weather condition - tailwind (contributing factor)
  - wind information - misjudged, pilot in command (contributing factor)
  - wrong runway - selected, pilot in command (contributing factor)
  - go-around - not performed, pilot in command (contributing factor)
  - proper touchdown point - exceeded, pilot in command (cause)
- Main gear collapsed, landing - roll
  - landing gear,main gear - overload
  - ground loop/swerve - intentional, pilot in command (contributing factor)

## Analysis

ACFT WAS LANDED DOWNWIND AND TOUCHED DOWN APRX HALF WAY DOWN THE RWY. THE PLT IN AN ATTEMPT TO AVOID AN OVERRUN INTENTIONALLY GROUND LOOPED THE ACFT RESULTING IN A LEFT MAIN GEAR COLLAPSE.

## Aircraft

- Registration: N1143Z (not matched to a registry record)
- Reported make and model: MOONEY M20J
- Category: Airplane
- Serial number: 24-1184
- Airframe hours: 480
- Engines: LYCOMING IO-360-A3B6D 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Met-Chem Testing Laboratories
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 1, 1983
- Departed: FLL, FORT LAUDERDALE, FL
- Airport: X43, Port Largo, runway 19, 2,300 × 25 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 785 total, 485 in this make and model, 595 as pilot in command, 67 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 140° at 3 knots
- Visibility: 8 statute miles
- Lowest ceiling: none
- Temperature: 88 °F, dew point 72 °F
- Altimeter: 30.00 inHg
- Observed at: TMB, 38 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 19840901045179A](https://openairdocs.org/incident/19840901045179A), Sep 1, 1984: Mooney M20J, Key Largo, FL, Substantial damage. Left gear collapsed when pilot purposely ground looped aircraft to keep from going from end of runway.

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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