# NTSB SEA73FYE40: Sikorsky S-61L, N302Y, Marblemount, WA, June 19, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 19, 1973
- Place: Marblemount, WA · MARBLEMOUNT, WA
- Location: 48.5418° N, 121.4396° W: Placed by OpenAirDocs: center of Marblemount, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=48.5418&lon=-121.4396&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 19, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 189882
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA73FYE40
- Page: https://openairdocs.org/ntsb/SEA73FYE40

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3312  73/6/19    MARBLEMOUNT,WASH    SIKORSKY S-61L      CR-  0  0  2  MISCELLANEOUS             COMMERCIAL, AGE 28, 2063
        TIME - 1510                    N302Y               PX-  0  0  0  OTHER                     TOTAL HOURS, 495 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          MARBLEMOUNT,WASH            LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: TREES                                     TAKEOFF: VERTICAL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - EXERCISED POOR JUDGMENT
        FACTOR(S)
           WEATHER - HIGH DENSITY ALTITUDE
        WEATHER BRIEFING - UNKNOWN/NOT REPORTED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      80
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
          CALM                                                     VFR
        TYPE OF FLIGHT PLAN
          NONE
         FIRE AFTER IMPACT
        REMARKS- HEAVY LOAD.DENS ALT ABT 5000FT MSL.
```

## Aircraft

- Registration: [N302Y](https://openairdocs.org/deregistered/N302Y-2018-01-03), registration cancelled 2018-01-03, S/N 61472C (OpenAirDocs)
- Reported make and model: SIKORSKY S-61L
- Registry model: [Sikorsky/Carson Services S61N](https://openairdocs.org/model/sikorsky-carson-services-s61n) (registry code 8142111) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: Substantial damage

## 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 19730619022219A](https://openairdocs.org/incident/19730619022219A), Jun 19, 1973: Skrsky S61L, Marblemount, WA, Substantial damage. Heavy load. Dens alt abt 5000FT MSL.

## Other investigations on N302Y (2)

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 LAX66A0070](https://openairdocs.org/ntsb/LAX66A0070), Mar 15, 1966: Sikorsky S-61L (N302Y), Los Angeles, CA, substantial damage
- [NTSB UNK64X1676](https://openairdocs.org/ntsb/UNK64X1676), May 8, 1964: Sikorsky S-61L (N302Y), Anaheim, 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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.