# NTSB OAK79DVD31: Let-Np-K L-13, N666FB, Livermore, CA, June 17, 1979

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 17, 1979
- 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: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report July 26, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 135345
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK79DVD31
- Page: https://openairdocs.org/ntsb/OAK79DVD31

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2029  79/6/17    LIVERMORE,CA        LET-NP-K L-13       CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 59, 600
        TIME - 1605                    N666FB              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 200 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - HUMMINGBIRD HAVEN
        DEPARTURE POINT             INTENDED DESTINATION
          LIVERMORE,CA                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: WIRES/POLES                               LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING
        FACTOR(S)
           WEATHER - DOWNDRAFT,UPDRAFTS
           TERRAIN - HIGH OBSTRUCTIONS
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          SCATTERED                                                UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  RELATIVE BEARING OF WIND
          NONE                                                     RIGHT CROSS WIND 068-112 DEGREES
        TEMPERATURE-F                                            WIND DIRECTION-DEGREES
           70                                                      215
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
           25                                                      VFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- TAILSKID & RETRACTABLE MAIN GEAR.
```

## Aircraft

- Registration: N666FB (not matched to a registry record)
- Reported make and model: LET-NP-K L-13
- Category: Glider
- Engines: none
- Damage: Substantial damage
- Airport: Hummingbird Haven

## 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 19790617013629A](https://openairdocs.org/incident/19790617013629A), Jun 17, 1979: Let L13BLANIK, Livermore, CA, Destroyed. Struck wires during approach to runway. Severe winds and downdraft a factor.

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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