# NTSB SEA79FYM02: Grum Amer AA5-A, N9721U, Hillsboro, OR, October 21, 1978

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 21, 1978
- Place: Hillsboro, OR · HILLSBORO, OR
- Location: 45.5253° N, 122.9364° W: Placed by OpenAirDocs: center of Hillsboro, OR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.5253&lon=-122.9364&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report December 11, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 139128
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA79FYM02
- Page: https://openairdocs.org/ntsb/SEA79FYM02

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3180  78/10/21   HILLSBORO,OR        GRUM AMER AA5-A     CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 33, 132
        TIME - 1910                    N9721U              PX-  0  0  2  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 9 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - HILLSBORO
        DEPARTURE POINT             INTENDED DESTINATION
          SILETZ,OR                   HILLSBORO,OR
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           UNDERSHOOT                                               LANDING: FINAL APPROACH
           COLLIDED WITH: TREES                                     LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - MISJUDGED DISTANCE AND ALTITUDE
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
           MISCELLANEOUS ACTS,CONDITIONS - POORLY PLANNED APPROACH
        REMARKS- CONT APCH & LND OK.
```

## Aircraft

- Registration: [N9721U](https://openairdocs.org/aircraft/N9721U), registered now, S/N AA5A-0121, built 1976 (OpenAirDocs)
- Reported make and model: GRUM AMER AA5-A
- Registry model: [Grumman American Avn. AA-5A](https://openairdocs.org/model/grumman-american-avn-aa-5a) (registry code 3960106) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Hillsboro

## 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 19781021034979A](https://openairdocs.org/incident/19781021034979A), Oct 21, 1978: Gulstm AA5, Hillsboro, OR, Substantial damage. Cont apch & lnd ok.

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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