# NTSB OAK77DVD16: Mooney M20A, N6551B, Hayward, CA, February 10, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: February 10, 1977
- Place: Hayward, CA · HAYWARD, CA
- Location: 37.6688° N, 122.0808° W: Placed by OpenAirDocs: center of Hayward, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.6688&lon=-122.0808&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report March 23, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 156829
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK77DVD16
- Page: https://openairdocs.org/ntsb/OAK77DVD16

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0172  77/2/10    HAYWARD,CA          MOONEY M20A         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 2110                    N6551B              PX-  0  0  0  DUAL                      AGE 30, 2039 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            109 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - HAYWARD
        DEPARTURE POINT             INTENDED DESTINATION
          LIVERMORE,CA                HAYWARD,CA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR RETRACTED                                           LANDING: LEVEL OFF/TOUCHDOWN
           COLLIDED WITH: WIRES/POLES                               LANDING: ROLL
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: NORMAL RETRACTION/EXTENSION ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
```

## Aircraft

- Registration: [N6551B](https://openairdocs.org/deregistered/N6551B-1980-10-03), registration cancelled 1980-10-03, S/N 1220 (OpenAirDocs)
- Reported make and model: MOONEY M20A
- Registry model: [Mooney M20A](https://openairdocs.org/model/mooney-m20a) (registry code 5870204) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Hayward

## 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 19770210002299A](https://openairdocs.org/incident/19770210002299A), Feb 10, 1977: Mooney M20A, Hayward, CA, Substantial damage. Landing gear retractor tube failed

## Other investigations on N6551B (1)

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 UNK64X3260](https://openairdocs.org/ntsb/UNK64X3260), Aug 7, 1964: Mooney MK20A (N6551B), Linden, CA, 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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