# NTSB ANC69A0057: Pilatus PC-6, N4911, Dead Horse, AK, May 20, 1969

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 20, 1969
- Place: Dead Horse, AK · DEAD HORSE, AK
- Location: 70.2056° N, 148.5117° W: Placed by OpenAirDocs: center of Deadhorse, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=70.2056&lon=-148.5117&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report June 23, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 186650
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC69A0057
- Page: https://openairdocs.org/ntsb/ANC69A0057

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1055  69/5/20    DEAD HORSE,ALAS     PILATUS PC-6        CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 34, 5000
        TIME - 1100                    N4911               PX-  0  0  3  AIR TAXI-PASSG            TOTAL HOURS, 100 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - DEAD HORSE
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           COLLIDED WITH: DITCHES                                   LANDING: ROLL
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: WHEELS,TIRES,AXLES
           MISCELLANEOUS ACTS,CONDITIONS - FROZEN, MOISTURE
           AIRPORTS/AIRWAYS/FACILITIES - AIRPORT CONDITIONS: ICE/SLUSH ON RAMP/TAXIWAY
        REMARKS- L WHEEL FROZEN DUE TO TAXIING THROUGH FREEZING SLUSH.TEMP 25 DEG.
```

## Aircraft

- Registration: [N4911](https://openairdocs.org/deregistered/N4911-1999-09-14), registration cancelled 1999-09-14, S/N 543, built 1964 (OpenAirDocs)
- Reported make and model: PILATUS PC-6
- Registry model: [Pilatus PC-6/350](https://openairdocs.org/model/pilatus-pc-6-350) (registry code 7090114) (OpenAirDocs)
- Registry engine: [Lycoming IGO-540-B1A](https://openairdocs.org/engine/lycoming-igo-540-b1a) (registry code 41538, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Dead Horse

## Other investigations on N4911 (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 ANC97LA158](https://openairdocs.org/ntsb/ANC97LA158), Sep 30, 1997: Pilatus PC-6-350 (N4911), Palmer, AK, substantial damage. Probable cause: An underspeed of the propeller system.
- [NTSB ANC71FAG84](https://openairdocs.org/ntsb/ANC71FAG84), May 4, 1971: Pilatus PC-6 (N4911), Iliamna, AK, 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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