# NTSB NYC79FHJ20: Grum Amer AA1-C, N9561U, Shirley, NY, July 4, 1979

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 4, 1979
- Place: Shirley, NY · SHIRLEY, NY
- Location: 40.7936° N, 72.8759° W: Placed by OpenAirDocs: center of Shirley, NY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.7936&lon=-72.8759&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 28, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 135254
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC79FHJ20
- Page: https://openairdocs.org/ntsb/NYC79FHJ20

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1932   79/7/4    SHIRLEY,NY          GRUM AMER AA1-C     CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1340                    N9561U              PX-  0  0  0  DUAL                      AGE 54, 1229 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            5 IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - BROOKHAVEN
        DEPARTURE POINT             INTENDED DESTINATION
          SHIRLEY,NY                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: PARKED AIRCRAFT                           LANDING: GO-AROUND
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
           DUAL STUDENT - FAILED TO MAINTAIN DIRECTIONAL CONTROL
        FACTOR(S)
           PILOT IN COMMAND - DELAYED IN INITIATING GO-AROUND
        REMARKS- COLLIDED WITH SAILPLANE,N6590I,DEMOLISHED.
```

## Aircraft

- Registration: [N9561U](https://openairdocs.org/deregistered/N9561U-2009-09-17), registration cancelled 2009-09-17, S/N AA1C0034, built 1977 (OpenAirDocs)
- Reported make and model: GRUM AMER AA1-C
- 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: Brookhaven

## 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 19790704016709A](https://openairdocs.org/incident/19790704016709A), Jul 4, 1979: Gulstm AA1C, Brookhaven, NY, Substantial damage. Instructor and student practicing touch and go landings ran off side of runway and struck parked glider.

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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