# NTSB ANC81DAG70: Interstate S-1B1, N49128, Whittier, AK, August 28, 1981

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 28, 1981
- Place: Whittier, AK · WHITTIER, AK
- Location: 60.7771° N, 148.6659° W: Placed by OpenAirDocs: center of Whittier, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=60.7771&lon=-148.6659&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 5, 1981
- Report: Brief approved by the director
- NTSB case key (mKey): 124595
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC81DAG70
- Page: https://openairdocs.org/ntsb/ANC81DAG70

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1814  81/8/28    WHITTIER,AK         INTERSTATE S-1B1    CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 43, 2000
        TIME - 0930                    N49128              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 1350 IN
                                       DAMAGE-DESTROYED    OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - WHITTIER
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          ANCHORAGE,AK                LA TOUCHE IS,AK             UNKNOWN/NOT REPORTED
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: OBJECT                                    LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           MISCELLANEOUS ACTS,CONDITIONS - CARGO SHIFTED
           POWERPLANT - ENGINE CONTROLS: THROTTLE-POWER LEVER ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - JAMMED
        FACTOR(S)
           WEATHER - TURBULENCE IN FLIGHT,CLEAR AIR
           TERRAIN - OTHER
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, BY RADIO
        WEATHER FORECAST - WEATHER CONSIDERABLY WORSE THAN FORECAST
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        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                  WIND DIRECTION-DEGREES
          NONE                                                     270
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
           25                                                      VFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- CARGO FASTENED TO REAR SEAT SHIFTED & JAMMED THROTTLE.HIT OBSTN ON BOAT DOCK.WND GSTG 35KTS.
```

## Aircraft

- Registration: N49128 (not matched to a registry record)
- Reported make and model: INTERSTATE S-1B1
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Whittier

## 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 19810828052719A](https://openairdocs.org/incident/19810828052719A), Aug 28, 1981: Arctic S1B1, Whittier, AK, Destroyed. Encountered turbulence which shifted cargo and jammed throttle closed. Aircraft crashed during forced landing.

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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