# Accident 19991111044029A: Diamon DA20A1, Concord, CA, November 11, 1999

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: November 11, 1999, 12:48 local time
- Place: Concord, CA
- Airport: Buchanan Field
- Damage: No damage
- Operating rules: General operating rules (Part 91)
- Location: 37.9996° N, 122.0302° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=37.9996&lon=-122.0302&mi=10
- Aircraft: N183DA (not matched to a registry record)
- Reported make and model: DIAMON DA20A1
- Pilot certificates: Student
- NTSB investigation: [NTSB LAX00LA032](https://openairdocs.org/ntsb/LAX00LA032) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19991111044029A

## Narrative

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

(-23) PILOT IN COMMAND (PIC) WAS PRACTICING TOUCH AND GOES ON RUNWAY 1R. PIC REPORTED BEFORE LOSING CONTROL OF THE AIRCRAFT (ABOUT 6 TO 10 SECONDS AFTER TOUCH DOWN) HE HAD ADJUSTED FLAPS 1 NOTCH UP, PUSHED IN THE CARB HEAT CONTROLLER AND HE THINKS HE APPLIED FULL THROTTLE. PIC CLAIMS AIRCRAFT MADE AN ABRUPT UNCOMMANDED HARD TURN. PIC ATTEMPTED TO APPLY RIGHT RUDDER WHICH HE CLAIMS STOPPED THE TURN BUT DID NOT TURN THE AIRCRAFT RIGHT. PIC REPORTS NO PHYSICAL OR AUDIBLE WARNINGS PRECEDING LOSS OF CONTROL. PIC CLAIMS HE APPLIED BRAKES WHEN THE AIRCRAFT EXITED THE RUNWAY. AIRCRAFT'S LEFT WING, UPON EXITING THE RUNWAY, STRUCK THE WIND SOCK POLE, AIRCRAFT PRECEDED TO SPIN THEN CAME TO A STOP WITH THE ENGINE STILL RUNNING. PIC SHUT DOWN AIRCRAFT ENGINE. PIC RADIOED TOWER HE WAS UNHARMED. AIRCRAFT SUSTAINED DAMAGE TO THE LEFT SPAR AND WING. PROPS WERE SEVERELY DAMAGED. THE RIGHT MAIN LANDING GEAR WAS TORN FROM AIRCRAFT.

## 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 LAX00LA032](https://openairdocs.org/ntsb/LAX00LA032), Nov 11, 1999: Diamond Aircraft Industries DA 20-A1 (N183DA), Concord, CA, substantial damage. Probable cause: The pilot's failure to maintain directional control of the airplane during the touch-and-go takeoff.

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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