# NTSB ANC79DA036: Dehavilland DHC-6, N851TB, Anaktuvuk Pass, AK, January 28, 1979

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: January 28, 1979
- Place: Anaktuvuk Pass, AK · ANAKTUVUK PASS, AK
- Location: 68.1474° N, 151.6982° W: Placed by OpenAirDocs: center of Anaktuvuk Pass, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=68.1474&lon=-151.6982&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report June 28, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 137215
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC79DA036
- Page: https://openairdocs.org/ntsb/ANC79DA036

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2111  79/1/28  NR.ANAKTUVUK PASS,AK  DEHAVILLAND DHC-6   CR-  0  0  2  COMMERCIAL                COMMERCIAL, AGE 50, 14650
        TIME - 1500                    N851TB              PX-  0  0  0  AIR TAXI-CARGO            TOTAL HOURS, 5000 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          BARROW,AK                   ANAKTUVUK PASS,AK            UMIAT,AK
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: CONTROLLED                  IN FLIGHT: OTHER
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - CONTINUED VFR FLIGHT INTO ADVERSE WEATHER CONDITIONS
        FACTOR(S)
           COPILOT - BECAME LOST/DISORIENTED
           MISCELLANEOUS ACTS,CONDITIONS - PILOT FATIGUE
           MISCELLANEOUS ACTS,CONDITIONS - WHITEOUT
        REMARKS- COLLIDED WITH MOUNTAIN PEAK.CLIMBING OUT OF WHITEOUT CONDS.CREW FLEW 12 OUT OF LAST 24HRS.
```

## Aircraft

- Registration: [N851TB](https://openairdocs.org/deregistered/N851TB-1989-11-17), registration cancelled 1989-11-17, S/N 201 (OpenAirDocs)
- Reported make and model: DEHAVILLAND DHC-6
- Registry model: [Dehavilland DHC-6 TWIN OTTER](https://openairdocs.org/model/dehavilland-dhc-6-twin-otter) (registry code 2802606) (OpenAirDocs)
- Category: Airplane
- Engines: turbo prop
- 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 19790128013029A](https://openairdocs.org/incident/19790128013029A), Jan 28, 1979: Dhav DHC6200, Anaktuvuk Pass, AK, Substantial damage. Aircraft flown into white out conditions at low altitude. Struck mountain trying to climb to safe altitude.

## Other investigations on N851TB (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 ANC89LA168](https://openairdocs.org/ntsb/ANC89LA168), Sep 19, 1989: de Havilland DHC-6 (N851TB), Sleepy Bay, AK, substantial damage. Probable cause: SELECTION OF UNSUITABLE TERRAIN (WATER CONDITION) BY THE PILOT. THE ROUGH WATER CONDITION WAS A RELATED 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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