# NTSB SEA77DYK19: Blanik L-13, N90846, Sisters, OR, July 22, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 22, 1977
- Place: Sisters, OR · SISTERS, OR
- Location: 44.2924° N, 121.5530° W: Placed by OpenAirDocs: center of Sisters, OR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.2924&lon=-121.5530&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 1, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 146683
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA77DYK19
- Page: https://openairdocs.org/ntsb/SEA77DYK19

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1670  77/7/22    SISTERS,OR          BLANIK L-13         CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 44, 213
        TIME - 1530                    N90846              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, ALL IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - SISTERS
        DEPARTURE POINT             INTENDED DESTINATION
          SISTERS,OR                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 TAKEOFF: RUN
           COLLIDED WITH: PARKED AIRCRAFT                           TAKEOFF: RUN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           PILOT IN COMMAND - MISJUDGED CLEARANCE
        FACTOR(S)
           PERSONNEL - MISCELLANEOUS-PERSONNEL: GROUND CREWMAN
           WEATHER - UNFAVORABLE WIND CONDITIONS
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        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                                                     LEFT CROSS WIND 248-292 DEGREES
        TEMPERATURE-F                                            WIND DIRECTION-DEGREES
           85                                                      300
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
           8                                                       VFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- STARTED L OF CENTERLINE.LEFT CROSSWIND.RELIED ON WING RUNNER TO AVOID ACFT.DRIFTED L INTO 2 ACFT.
```

## Aircraft

- Registration: [N90846](https://openairdocs.org/aircraft/N90846), registered now, S/N 025702, built 1973 (OpenAirDocs)
- Reported make and model: BLANIK L-13
- Registry model: [Let BLANIK L-13](https://openairdocs.org/model/let-blanik-l-13) (registry code 1360306) (OpenAirDocs)
- Registry engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000, none) (OpenAirDocs)
- Category: Glider
- Engines: none
- Damage: Substantial damage
- Airport: Sisters

## 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 19770722019339A](https://openairdocs.org/incident/19770722019339A), Jul 22, 1977: Let L13BLANIK, Sisters, OR, Substantial damage. Started l of centerline. Left crosswind. Relied on wing runner to avoid acft. Drifted l into 2 acft.

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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