# NTSB IAD70DIG13: Enstrom F-28A, N4886, Silver Springs, MD, April 10, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 10, 1970
- Place: Silver Springs, MD · SILVER SPRINGS, MD
- Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 9, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 135141
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD70DIG13
- Page: https://openairdocs.org/ntsb/IAD70DIG13

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0660  70/4/10    SILVER SPRINGS,MD   ENSTROM F-28A       CR-  0  0  1  INSTRUCTIONAL             PRIVATE, AGE 43, 5200
        TIME - 1140                    N4886               PX-  0  0  0  SOLO                      TOTAL HOURS, 12 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - ROOFTOP HELIPAD
        DEPARTURE POINT             INTENDED DESTINATION
          SILVER SPRINGS,MD           SILVER SPRINGS,MD
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ROLL OVER                                                STATIC: IDLING ROTORS
        PROBABLE CAUSE(S)
           PERSONNEL - FLIGHT INSTRUCTOR: INADEQUATE SUPERVISION OF FLIGHT
        FACTOR(S)
           WEATHER - UNFAVORABLE WIND CONDITIONS
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  RELATIVE BEARING OF WIND
          NONE                                                     TAIL WIND 158-202 DEGREES
        TEMPERATURE-F                                            WIND DIRECTION-DEGREES
           63                                                      260
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
           15                                                      VFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- INSTR STANDING OUTSIDE OF ACFT RELEASED COLLECTIVE LOCK.WHEN ROTOR SPEED WAS APRX 1800 RPM.
```

## Aircraft

- Registration: N4886 (not matched to a registry record)
- Reported make and model: ENSTROM F-28A
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Rooftop Helipad

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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