# NTSB DIA68A0001: Hughes 269B, N9474F, Silver Spring, MD, July 14, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 14, 1967
- Place: Silver Spring, MD · SILVER SPRING, MD
- Location: 39.0024° N, 77.0208° W: Placed by OpenAirDocs: center of Silver Spring, MD, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.0024&lon=-77.0208&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 2, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 115944
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DIA68A0001
- Page: https://openairdocs.org/ntsb/DIA68A0001

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0884  67/7/14    SILVER SPRING,MD    HUGHES 269B         CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, FL.INSTR.,
        TIME - 0755                    N9474F              PX-  0  0  0  POLICE PATROL             AGE 35, 6530 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            2001 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           AIRFRAME - FUSELAGE: WINDSHIELDS,WINDOWS,CANOPIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING OFF AIRPORT
                                  PROP/ENGINE VIBRATION
                                  SUSPECTED OR KNOWN AIRCRAFT DAMAGE
        REMARKS- LFT PART OF CANOPY SLAT PN269A2297-3 SEPARATED FROM CANOPY,STRUCK/DAMAGED TAIL ROTOR AND CANOPY.
```

## Aircraft

- Registration: [N9474F](https://openairdocs.org/deregistered/N9474F-2005-03-08), registration cancelled 2005-03-08, S/N 116-0278, built 1966 (OpenAirDocs)
- Reported make and model: HUGHES 269B
- Registry model: [Hughes 269B](https://openairdocs.org/model/hughes-269b) (registry code 4470502) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N9474F (4)

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 SEA95LA112](https://openairdocs.org/ntsb/SEA95LA112), Jun 4, 1995: Hughes 269B (N9474F), Caldwell, ID, destroyed. Probable cause: THE PILOT'S FAILURE TO MAINTAIN CLEARANCE FROM POWER LINES. FACTORS INCLUDE SUNGLARE ENCOUNTERED WHEN HE TURNED INTO THE SUN.
- [NTSB SEA93IA073](https://openairdocs.org/ntsb/SEA93IA073), Mar 5, 1993: Hughes 269B (N9474F), Mcminnville, OR, incident, minor damage. Probable cause: AN INFLIGHT LOSS OF CONTROL, AND INADEQUATE REMEDIAL ACTION. FACTORS INCLUDE A TAILWIND, AND GUSTS.
- [NTSB SEA92LA005](https://openairdocs.org/ntsb/SEA92LA005), Oct 12, 1991: Hughes 269B (N9474F), Hillsboro, OR, substantial damage. Probable cause: THE FAILURE TO MAINTAIN ROTOR RPM. FACTORS INCLUDE INADEQUATE PREFLIGHT PLANNING, OVERCONFIDENCE IN AIRCRAFT'S ABILITY, AND NON-SUITABLE TERRAIN.
- [NTSB DIA69D0091](https://openairdocs.org/ntsb/DIA69D0091), Oct 15, 1968: Hughes 269B (N9474F), Washington, DC, 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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