# Accident 20130729017139A: Mooney M20J, Leonardtown, MD, July 29, 2013

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 29, 2013, 19:36 local time
- Place: Leonardtown, MD
- Damage: Substantial damage
- Phase of flight: Maneuver
- Operating rules: General operating rules (Part 91)
- Location: 38.2878° N, 76.6011° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=38.2878&lon=-76.6011&mi=10
- Aircraft: N4570H, a cancelled registration (https://openairdocs.org/deregistered/N4570H-2015-03-27) (OpenAirDocs)
- Registry model: Mooney M20J (registry code 5870219, https://openairdocs.org/model/mooney-m20j) (OpenAirDocs)
- Registry engine: Lycoming I0360 series (registry code 41515, https://openairdocs.org/engine/lycoming-i0360-series) (OpenAirDocs)
- Reported make and model: MOONEY M20J
- Reported engine: LYCOMING I0360 SER
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 1
- NTSB investigation: [NTSB ERA13LA342](https://openairdocs.org/ntsb/ERA13LA342) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20130729017139A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ON 29 JULY, 2013 AT APPROXIMATELY 1936 LOCAL, TWO PILOTS IN A MOONEY M20J, N4570H EXPERIENCED ENGINE POWER REDUCTION WHILE MANEUVERING AT 1500FT AGL NEAR ST. MARY?S COUNTY AIRPORT (2W6).  THE ENGINE WAS OPERATING AT A LOW SPEED BUT FAILED TO RESPOND TO THROTTLE INPUT.  THE PILOT IN COMMAND CHECKED FUEL SELECTOR SWITCHED THE BOOST PUMP ON AND CYCLED POWER LEVERS WITH NO RESULT.  THE PILOT PICKED A FIELD AND PERFORMED A POWER OFF, FLAPS UP GEAR UP LANDING.  THE AIRCRAFT SKIDDED THROUGH THE CLEARED FIELD AND IMPACTED THE FENCE LINE, SPINNING AROUND 180 DEGREES.  THE TREES AND FENCE POST IMBEDDED IN THE FENCE LINE TORE OFF THE OUTER THREE FEET OF THE RIGHT WING AND DAMAGED THE RIGHT WING  ROOT AREA.  THE LEFT WING SUFFERED TREE DAMAGE AT THE WING ROOT WHICH ALSO STRUCK THE FRONT LEFT COCKPIT AREA, BREAKING OUT THE WINDSHIELD AND DEFORMING THE CANOPY STRUCTURE.  THE LEFT WING WAS ALSO DAMAGED APPROXIMATELY SIX FEET AND TEN FEET FROM THE FUSELAGE.  THE FUEL TANK ON THE LEFT WING WAS DEFORMED AND DRAINED THE FUEL OUT IN THE FIELD.  THE RIGHT WING TANK WAS HALF FULL.

## The NTSB's investigation of this event (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 ERA13LA342](https://openairdocs.org/ntsb/ERA13LA342), Jul 29, 2013: Mooney M20J (N4570H), Leonardtown, MD, substantial damage. Probable cause: The improper installation and inspection of the throttle linkage by maintenance personnel, which resulted in the throttle linkage coming loose and a subsequent partial loss of engine power.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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