# NTSB DIA68A0039: Hughes 300, N9502F, Marlow Heights, MD, March 21, 1968

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: March 21, 1968
- Place: Marlow Heights, MD · MARLOW HEIGHTS, MD
- Location: 38.8211° N, 76.9409° W: Placed by OpenAirDocs: center of Marlow Heights, MD, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.8211&lon=-76.9409&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report August 20, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 110930
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DIA68A0039
- Page: https://openairdocs.org/ntsb/DIA68A0039

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1947  68/3/21    MARLOW HEIGHTS,MD   HUGHES 300          CR-  2  0  0  MISCELLANEOUS             COMMERCIAL, AGE 35, 2000
        TIME - 0130                    N9502F              PX-  0  0  0  POLICE PATROL             TOTAL HOURS, 269 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: WIRES/POLES                               IN FLIGHT: HOVERING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - EXERCISED POOR JUDGMENT
          PILOT-HOVERED OVER UNFAMILIAR AREA AT NIGHT.
           TERRAIN - HIGH OBSTRUCTIONS
         FIRE AFTER IMPACT
        REMARKS- INVESTIGATING SUSPECTED BANK ROBBERY.
```

## Aircraft

- Registration: [N9502F](https://openairdocs.org/deregistered/N9502F-1968-04-09), registration cancelled 1968-04-09, S/N 1060265 (OpenAirDocs)
- Reported make and model: HUGHES 300
- Registry model: [Hughes 269B](https://openairdocs.org/model/hughes-269b) (registry code 4470502) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Destroyed

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.