# Accident 20000704006629A: Thorp T-211, Grass Valley, CA, July 4, 2000

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 4, 2000, 11:45 local time
- Place: Grass Valley, CA
- Damage: No damage
- Operating rules: General operating rules (Part 91)
- Location: 39.1791° N, 120.9793° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=39.1791&lon=-120.9793&mi=10
- Aircraft: N91313, a cancelled registration (https://openairdocs.org/deregistered/N91313-2014-11-24) (OpenAirDocs)
- Registry model: Thorp T-211 (registry code 8950104, https://openairdocs.org/model/thorp-t-211) (OpenAirDocs)
- Registry engine: Lycoming 0-145B series (registry code 41502, https://openairdocs.org/engine/lycoming-0-145b-series) (OpenAirDocs)
- Fatal injuries: 0
- NTSB investigation: [NTSB LAX00LA250](https://openairdocs.org/ntsb/LAX00LA250) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20000704006629A

## Narrative

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

(-23) THE PILOT WAS CONDUCTING SCENIC FLYING WITH HIS SON APPROX. 1000 AGL OVER IN THE AREA OF ALTO SIERRA, CA. HE NOTICED THAT THE AIRPLANE WAS DEVELOPING A SINK RATE SO HE APPLIED FULL POWER, AND INITIATED A 180 DEGREES TURN, BUT THE AIRPLANE CONTINUED SINKING. THE PILOT THEN STOPPED TURNING AT ABOUT 90 DEGREES AND IMPACTED THE TREES WHICH DESTROYED THE AIRPLANE AND CAUSED SERIOUS INJURIES TO BOTH AIRPLANE OCCUPANTS.

## 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 LAX00LA250](https://openairdocs.org/ntsb/LAX00LA250), Jul 4, 2000: Thorp T211 (N91313), Grass Valley, CA, substantial damage. Probable cause: the pilot encountered a mountain wave at an altitude too low to maintain clearance from trees.

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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