# NTSB IAD76DIA04: Hughes 369, N9056F, Mechanicsville, MD, September 19, 1975

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: September 19, 1975
- Place: Mechanicsville, MD · MECHANICSVILLE, MD
- Location: 38.4291° N, 76.7460° W: Placed by OpenAirDocs: center of Mechanicsville, MD, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.4291&lon=-76.7460&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report November 5, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 150669
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD76DIA04
- Page: https://openairdocs.org/ntsb/IAD76DIA04

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2905  75/9/19    MECHANICSVILLE,MD   HUGHES 369          CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, FL.INSTR.,
        TIME - 1620                    N9056F              PX-  0  0  1  CORP/EXEC                 AGE 56, 11180 TOTAL
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            HOURS, 697 IN TYPE,
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          WASHINGTON,DC               PINEY POINT,MD
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           NOSE OVER/DOWN                                           TAKEOFF: VERTICAL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
        REMARKS- WATER TKOF,REAR SECTION OF FLOATS LIFTED OUT OF WATER FRONT SECT ON WATER.ACFT PITCHED FWD.
```

## Aircraft

- Registration: [N9056F](https://openairdocs.org/deregistered/N9056F-2020-08-18), registration cancelled 2020-08-18, S/N 1190214E, built 1972 (OpenAirDocs)
- Reported make and model: HUGHES 369
- Registry model: [Hughes 369HE](https://openairdocs.org/model/hughes-369he) (registry code 4470720) (OpenAirDocs)
- Registry engine: [Rolls-Royce 250-C10D](https://openairdocs.org/engine/rolls-royce-250-c10d) (registry code 54172, turbo-shaft) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: Substantial damage

## 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 19750919031699A](https://openairdocs.org/incident/19750919031699A), Sep 19, 1975: Hughes 369HE, Mechanicsville, MD, Substantial damage. Water tkof,rear section of floats lifted out of water front sect on water. Acft pitched fwd.

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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