# NTSB DEN75AD007: Gates Lear 25B, N366AA, Briggsdale, CO, August 31, 1974

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: August 31, 1974
- Place: Briggsdale, CO · BRIGGSDALE, CO
- Location: 40.6360° N, 104.3243° W: Placed by OpenAirDocs: center of Briggsdale, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.6360&lon=-104.3243&mi=10
- Phase of flight: [Uncontrolled descent](https://openairdocs.org/ntsb-phases/650) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 4 fatal
- Status: Completed, report January 6, 1975
- Report: Brief approved by the director
- Safety recommendations: Yes
- NTSB case key (mKey): 79899
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN75AD007
- Page: https://openairdocs.org/ntsb/DEN75AD007

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3755  74/8/31  NR.BRIGGSDALE,COLO    GATES LEAR 25B      CR-  3  0  0  INSTRUCTIONAL             AIRLINE TRANSPORT, AGE
        TIME - 1250                    N366AA              PX-  1  0  0  DUAL                      51, 9323 TOTAL HOURS, 161
                                       DAMAGE-DESTROYED    OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          DENVER,COLO                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
          MISC-UNABLE TO RETRIM ACFT FOR UNDETERMINED REASON
         FIRE AFTER IMPACT
        REMARKS- UNUSUAL ATTITUDE PRACTICE.FULL NOSE DOWN TRIM.
```

## Aircraft

- Registration: [N366AA](https://openairdocs.org/deregistered/N366AA-1975-02-07), registration cancelled 1975-02-07, S/N 151 (OpenAirDocs)
- Reported make and model: GATES LEAR 25B
- Registry model: [Gates Lear Jet 25B](https://openairdocs.org/model/gates-lear-jet-25b) (registry code 5170511) (OpenAirDocs)
- Category: Airplane
- Engines: turbo jet
- Damage: Destroyed

## 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 19740831040719A](https://openairdocs.org/incident/19740831040719A), Aug 31, 1974: Lear 25B, Briggsdale, CO, Destroyed, 1 fatal. Unusual attitude practice. Full nose down trim. Misc-unable to retrim acft for undetermined reason

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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