# NTSB IAD77AA038: Beech HS.125, N40PC, Mclean, VA, April 28, 1977

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: April 28, 1977
- Place: Mclean, VA · MCLEAN, VA
- Location: 38.9435° N, 77.1929° W: Placed by OpenAirDocs: center of McLean, VA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.9435&lon=-77.1929&mi=10
- Phase of flight: [Uncontrolled descent](https://openairdocs.org/ntsb-phases/650) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 4 fatal
- Status: Completed, report September 18, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 146745
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD77AA038
- Page: https://openairdocs.org/ntsb/IAD77AA038

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3894  77/4/28    MCLEAN,VA           BEECH HS.125        CR-  2  0  0  NONCOMMERCIAL             AIRLINE TRANSPORT, AGE
        TIME - 2038                    N40PC               PX-  2  0  0  CORP/EXEC                 34, 7807 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            1900 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          BIRMINGHAM,AL               RETURN                       WASHINGTON,DC
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           INSTRUMENTS/EQUIPMENT AND ACCESSORIES - FLIGHT AND NAVIGATION INSTRUMENTS: ATTITUDE GYRO
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
         FIRE AFTER IMPACT
        REMARKS- FAILURE OR MALF OF UNDETERMINED NATURE IN PLTS ATTITUDE INDC SYST.CTL LOST,ACFT OVERSTRESSED.
```

## Aircraft

- Registration: N40PC (not matched to a registry record)
- Reported make and model: BEECH HS.125
- Category: Airplane
- Engines: turbo jet
- Damage: Destroyed

## 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 19770428043249A](https://openairdocs.org/incident/19770428043249A), Apr 28, 1977: Hwksly BH125600A, VA, Destroyed, 2 fatal

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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