# Accident 20180416003749A: Mooney M20R, San Antonio, TX, April 16, 2018

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: April 16, 2018, 14:24 local time
- Place: San Antonio, TX
- Airport: Twin Oaks Airport
- Damage: Substantial damage
- Phase of flight: Landing: Rollout
- Operating rules: General operating rules (Part 91)
- Location: 29.5703° N, 98.4683° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=29.5703&lon=-98.4683&mi=10
- Aircraft: N6868, a cancelled registration (https://openairdocs.org/deregistered/N6868-2019-09-06) (OpenAirDocs)
- Registry model: Mooney M20R (registry code 5870225, https://openairdocs.org/model/mooney-m20r) (OpenAirDocs)
- Registry engine: Continental IO-550 series (registry code 17042, https://openairdocs.org/engine/continental-io-550-series) (OpenAirDocs)
- Reported make and model: MOONEY M20R
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Airline transport, flight instructor
- Pilot flight hours: 19,000 total, 2,500 in this make and model, 25 in the last 90 days
- NTSB investigation: [NTSB GAA18CA224](https://openairdocs.org/ntsb/GAA18CA224) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20180416003749A

## Narrative

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

ON APRIL 16, 2018 AT APPROXIMATELY 1420 LOCAL, MOONEY N6868, REGISTERED TO ^MR. WILLIAM M. PEARSON^, LANDED ON RUNWAY 30 WHERE IT RAN OUT OF RUNWAY AND ROLLED OFF THE END AT TWIN OAKS AIRPORT (T94). THE AIRCRAFT CAME TO REST ON HEIMER ROAD, A RESIDENTIAL ROAD ON THE DEPARTURE END OF RUNWAY 30. THE FLIGHT ORIGINATED FROM ANGELINA COUNTY AIRPORT (KLFK)

THE AIRCRAFT EXPERIENCED DAMAGE TO THE WINGS AND SPAR, NOSEWHEEL ASSEMBLY, FUEL TANKS, RUDDER AND VERTICAL STABILIZER, PROPELLER AND ENGINE. THERE WERE NO INJURIES TO THE TWO SOULS ON BOARD.

THE REPORTED WEATHER FOR SAN ANTONIO INTERNATIONAL AIRPORT (KSAT), THE NEAREST REPORTING AIRPORT, CALLED FOR WINDS FROM 160 AT 17 GUSTING TO 24. CALCULATIONS FROM THESE REPORTED WINDS SHOW THAT AN AIRCRAFT LANDING ON RUNWAY 30 WOULD EXPERIENCE TAILWINDS FROM 13-19 KNOTS AND RIGHT CROSSWINDS FROM 11-16 KNOTS.

^MR. PEARSON^ STATED IN HIS INTERVIEW THAT HE PURPOSELY LANDED ON RUNWAY 30 BECAUSE IT IS STANDARD PRACTICE TO LAND ON RUNWAY 30 WITH ITS UPSLOPE, EVEN WITH LIGHT TAILWINDS, THAN TO LAND ON RUNWAY 12 WITH ITS DOWNSLOPE. FAA CHART SUPPLEMENT DATA DOES NOT SHOW ANY SLOPE INFORMATION FOR T94, BUT AIRNAV SHOWS A GRADIENT OF 1.9%. IT WAS DISCOVERED DURING THE ON-SITE INVESTIGATION THAT THE RUNWAY DID INDEED HAVE A SLOPE, HOWEVER IT IS UNDETERMINED IF IT IS 1.9%. ^MR. PEARSON^ ALSO STATED THAT HIS CUTOFF POINT WAS 10 KNOTS OF TAILWIND. AT THAT POINT, HE WOULD NORMALLY CHOOSE TO LAND ON RUNWAY 12. ^MR. PEARSON^ MENTIONED HE CALCULATED THE TAILWIND AT 10 KNOTS AND THAT THE GROUND ROLL WOULD REQUIRE THE ENTIRE LENGTH OF THE RUNWAY, APPROXIMATELY 2225'.

## 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 GAA18CA224](https://openairdocs.org/ntsb/GAA18CA224), Apr 16, 2018: Mooney M20R (N6868), San Antonio, TX, substantial damage. Probable cause: The pilot’s landing long in tailwind conditions with insufficient runway remaining to stop the airplane.

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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