# NTSB UNK64X4105: Viscount V-700, N7423, Springfield, VA, September 22, 1964

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: September 22, 1964
- Place: Springfield, VA · SPRINGFIELD, VA
- Location: 38.7816° N, 77.1839° W: Placed by OpenAirDocs: center of Springfield, VA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.7816&lon=-77.1839&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious, 40 uninjured
- Status: Completed, report January 19, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 181576
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X4105
- Page: https://openairdocs.org/ntsb/UNK64X4105

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0047  64/9/22  NR.SPRINGFIELD VA     VISCOUNT V-700      CR-  0  2  2  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 0751                    N7423               PX-  0  0 38                            41, 13608 TOTAL HOURS,
                                       DAMAGE-NONE         OT-  0  0  0                            3488 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        OPERATOR - UNITED AIR LINES,INC.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           EVASIVE MANEUVER                                         IN FLIGHT: DESCENDING
        PROBABLE CAUSE(S)
           MISCELLANEOUS - EVASIVE MANEUVER TO AVOID COLLISION
           PERSONNEL - TRAFFIC CONTROL PERSONNEL: FAILURE TO ADVISE OF OTHER TRAFFIC
        REMARKS- OTHER AIRCRAFT INVOLVED WAS AF82115,U3A ANDREWS AFB TO DULLES IFR
```

## Aircraft

- Registration: [N7423](https://openairdocs.org/deregistered/N7423-1980-11-20), registration cancelled 1980-11-20, S/N 121 (OpenAirDocs)
- Reported make and model: VISCOUNT V-700
- Registry model: [Vickers VISCOUNT 797](https://openairdocs.org/model/vickers-viscount-797) (registry code 9470404) (OpenAirDocs)
- Category: Airplane
- Engines: turbo prop
- Damage: No 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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