# NTSB NYC77FHJ15: Cessna 210K, N9420M, Ronkonkoma, NY, April 20, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 20, 1977
- Place: Ronkonkoma, NY · RONKONKOMA, NY
- Location: 40.8035° N, 73.1245° W: Placed by OpenAirDocs: center of Ronkonkoma, NY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.8035&lon=-73.1245&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report July 15, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 157858
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC77FHJ15
- Page: https://openairdocs.org/ntsb/NYC77FHJ15

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1463  77/4/20    RONKONKOMA,NY       CESSNA 210K         CR-  0  0  1  MISCELLANEOUS             AIRLINE TRANSPORT, AGE
        TIME - 1600                    N9420M              PX-  0  0  0  FERRY                     38, 2095 TOTAL HOURS, 142
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - ISLIP MACARTHUR
        DEPARTURE POINT             INTENDED DESTINATION
          CALVERTON,NY                RONKONKOMA,NY
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           UNDERSHOOT                                               LANDING: FINAL APPROACH
           GEAR COLLAPSED                                           LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - MISJUDGED DISTANCE AND ALTITUDE
           PILOT IN COMMAND - IMPROPER LEVEL OFF
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - PREVIOUS DAMAGE
        REMARKS- NOSE GR PREV DMG DRG GND ACDT.PLT SECURED ENG ONFINAL,ENTERED HI SINK RATE,UN CK.
```

## Aircraft

- Registration: [N9420M](https://openairdocs.org/aircraft/N9420M), registered now, S/N 21059320, built 1970 (OpenAirDocs)
- Reported make and model: CESSNA 210K
- Registry model: [Cessna 210K](https://openairdocs.org/model/cessna-210k) (registry code 2073446) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Islip Macarthur

## 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 19770420007379A](https://openairdocs.org/incident/19770420007379A), Apr 20, 1977: Cessna 210K, Ronkonkoma, NY, Substantial damage. Nose gr prev dmg drg gnd acdt. Plt secured eng onfinal,entered hi sink rate,un ck.

## Other investigations on N9420M (2)

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 ERA26LA325](https://openairdocs.org/ntsb/ERA26LA325), Sep 2, 2026: Cessna 210 (N9420M), Dawson Springs, KY, substantial damage, investigation ongoing
- [NTSB OAK74FXQ13](https://openairdocs.org/ntsb/OAK74FXQ13), Sep 27, 1973: Cessna 210 (N9420M), Gerlach, NV, substantial damage

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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