# NTSB OAK76DVD30: Aero Comdr 500B, N6221X, Livermore, CA, April 6, 1976

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 6, 1976
- Place: Livermore, CA · LIVERMORE, CA
- Location: 37.6870° N, 121.7598° W: Placed by OpenAirDocs: center of Livermore, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.6870&lon=-121.7598&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 27, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 153501
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK76DVD30
- Page: https://openairdocs.org/ntsb/OAK76DVD30

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0922   76/4/6    LIVERMORE,CA        AERO COMDR 500B     CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1650                    N6221X              PX-  0  0  0  DUAL                      AGE 29, 5300 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            400 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - LIVERMORE
        DEPARTURE POINT             INTENDED DESTINATION
          HAYWARD,CA                  LIVERMORE,CA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           WHEELS-UP                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           DUAL STUDENT - FAILED TO ASSURE THE GEAR WAS DOWN AND LOCKED
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - CHECKLIST-FAILED TO USE
        REMARKS- RT MAIN GEAR NOT LOCKED PRIOR TO TOUCHDOWN,NO DISCREPANCY FOUND ON GEAR CHECK.
```

## Aircraft

- Registration: N6221X (not matched to a registry record)
- Reported make and model: AERO COMDR 500B
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Livermore

## 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 19760406007999A](https://openairdocs.org/incident/19760406007999A), Apr 6, 1976: Rkwell 500B, Livermore, CA, Substantial damage. Rt main gear not locked prior to touchdown,no discrepancy found on gear check.

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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