# NTSB DEN77DTC28: Cessna T210L, N1721X, Keyhole, WY, September 10, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 10, 1977
- Place: Keyhole, WY · KEYHOLE, WY
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report November 16, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 144787
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN77DTC28
- Page: https://openairdocs.org/ntsb/DEN77DTC28

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3250  77/9/10    KEYHOLE, WY         CESSNA T210L        CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 34, 617
        TIME - 1500                    N1721X              PX-  0  0  3  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 31 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - KEYHOLE
        DEPARTURE POINT             INTENDED DESTINATION
          KEYHOLE, WY                 CHADRON,NE
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 TAKEOFF: INITIAL CLIMB
           COLLIDED WITH: DIRT BANK                                 TAKEOFF: INITIAL CLIMB
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL
```

## Aircraft

- Registration: [N1721X](https://openairdocs.org/deregistered/N1721X-1989-12-13), registration cancelled 1989-12-13, S/N 21060743 (OpenAirDocs)
- Reported make and model: CESSNA T210L
- Registry model: [Cessna T210L](https://openairdocs.org/model/cessna-t210l) (registry code 2073449) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Keyhole

## 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 19770910028549A](https://openairdocs.org/incident/19770910028549A), Sep 10, 1977: Cessna T210L, Keyhole, WY, Substantial damage

## Other investigations on N1721X (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 DEN87FA061](https://openairdocs.org/ntsb/DEN87FA061), Jan 28, 1987: Cessna T210L (N1721X), Nucla, CO, destroyed, 4 fatal

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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