# NTSB MKC74DTG12: Amer Avco AA1-B, N9990L, Cooperstown, ND, January 21, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: January 21, 1974
- Place: Cooperstown, ND · COOPERSTOWN, ND
- Location: 47.4449° N, 98.1256° W: Placed by OpenAirDocs: center of Cooperstown, ND, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.4449&lon=-98.1256&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report April 2, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 187004
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC74DTG12
- Page: https://openairdocs.org/ntsb/MKC74DTG12

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0269  74/1/21    COOPERSTOWN,N DAK   AMER AVCO AA1-B     CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1025                    N9990L              PX-  0  0  0  DUAL                      AGE 27, 1233 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            488 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - COOPERSTOWN
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          VALLEY CITY,N DAK           FARGO,N DAK                  COOPERSTOWN,N DAK
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 TAKEOFF: RUN
           COLLIDED WITH: SNOWBANK                                  TAKEOFF: RUN
        PROBABLE CAUSE(S)
           DUAL STUDENT - FAILED TO MAINTAIN DIRECTIONAL CONTROL
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
        FACTOR(S)
           AIRPORTS/AIRWAYS/FACILITIES - AIRPORT CONDITIONS: SNOW ON RUNWAY
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
           AIRPORTS/AIRWAYS/FACILITIES - AIRPORT CONDITIONS: SNOW WINDROWS
        REMARKS- SIMULATED SOFT FLD TKOF L GR HIT DRIFTED SNOW ON L SIDE OF RWY.ACFT IN DEEP SNOW BFR IP GAINED CTL
```

## Aircraft

- Registration: [N9990L](https://openairdocs.org/deregistered/N9990L-1981-02-05), registration cancelled 1981-02-05, S/N AA1B-0290 (OpenAirDocs)
- Reported make and model: AMER AVCO AA1-B
- Registry model: [Grumman American Avn. AA-1B](https://openairdocs.org/model/grumman-american-avn-aa-1b) (registry code 3960103) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Cooperstown

## 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 19740121002749A](https://openairdocs.org/incident/19740121002749A), Jan 21, 1974: Grumav AA1B, Cooperstown, ND, Substantial damage. Simulated soft fld tkof l gr hit drifted snow on l side of rwy. Acft in deep snow bfr ip gained ctl

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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