# NTSB CHI79DEP19: Grumman AA-1C, N9649U, Madison, WI, December 26, 1978

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 26, 1978
- Place: Madison, WI · MADISON, WI
- Location: 43.0731° N, 89.4012° W: Placed by OpenAirDocs: center of Madison, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.0731&lon=-89.4012&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 13, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 138425
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI79DEP19
- Page: https://openairdocs.org/ntsb/CHI79DEP19

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3799  78/12/26   MADISON,WI          GRUMMAN AA-1C       CR-  0  0  1  NONCOMMERCIAL             STUDENT, AGE 16, 39 TOTAL
        TIME - 1000                    N9649U              PX-  0  0  0  PRACTICE                  HOURS, 34 IN TYPE, NOT
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - DANE COUNTY
        DEPARTURE POINT             INTENDED DESTINATION
          MILWAUKEE,WI                MADISON,WI
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 TAXI: FROM LANDING
           COLLIDED WITH: SNOWBANK                                  TAXI: FROM LANDING
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: BRAKING SYSTEM (NORMAL SYSTEM)
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - BRAKES FROZEN
        REMARKS- RIGHT BRAKE FROZE
```

## Aircraft

- Registration: [N9649U](https://openairdocs.org/deregistered/N9649U-2017-06-15), registration cancelled 2017-06-15, S/N AA1C0086, built 1977 (OpenAirDocs)
- Reported make and model: GRUMMAN AA-1C
- Registry model: [Grumman American Avn. AA-1C](https://openairdocs.org/model/grumman-american-avn-aa-1c) (registry code 3960100) (OpenAirDocs)
- Registry engine: [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series) (registry code 41505, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Dane County

## 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 19781226041129A](https://openairdocs.org/incident/19781226041129A), Dec 26, 1978: Gulstm AA5, Madison, WI, Substantial damage. Right brake froze

## Other investigations on N9649U (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 CEN09CA568](https://openairdocs.org/ntsb/CEN09CA568), Sep 2, 2009: Grumman American Avn. AA-1C (N9649U), Holland, MI, substantial damage. Probable cause: The pilot's failure to maintain control of the airplane during the landing and subsequent go-around.

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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