# NTSB ANC75DAA16: Cessna 170B, N4336B, Bettles, AK, September 9, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 9, 1974
- Place: Bettles, AK · BETTLES, AK
- Location: 66.9073° N, 151.5381° W: Placed by OpenAirDocs: center of Bettles, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=66.9073&lon=-151.5381&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 5, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 138777
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC75DAA16
- Page: https://openairdocs.org/ntsb/ANC75DAA16

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3356   74/9/9  NR.BETTLES,ALAS       CESSNA 170B         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE UNK/NR, 150
        TIME - 1800                    N4336B              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 63 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         BETTLES,ALAS                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           COLLIDED WITH: OBJECT                                    LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (OWNER PERSONNEL)
           POWERPLANT - FUEL SYSTEM: CARBURETOR
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY SECURED
           MISCELLANEOUS ACTS,CONDITIONS - LEAK/LEAKAGE
           TERRAIN - ROUGH/UNEVEN
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- COLLIDED WITH BOULDER.CARB LOOSE ON ENGINE.AIR LEAK IN INDUCTION SYSTEM.ANNUAL INSP OVERDUE.
```

## Aircraft

- Registration: [N4336B](https://openairdocs.org/aircraft/N4336B), registered now, S/N 26680, built 1955 (OpenAirDocs)
- Reported make and model: CESSNA 170B
- Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs)
- Registry engine: [Continental 0-300 series](https://openairdocs.org/engine/continental-0-300-series) (registry code 17022, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- 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 19740909031389A](https://openairdocs.org/incident/19740909031389A), Sep 9, 1974: Cessna 170B, Bettles, AK, Substantial damage. Collided with boulder. Carb loose on engine. Air leak in induction system. Annual insp overdue.

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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