# NTSB ANC72DAG56: Piper PA-18, N4579A, Chugiak, AK, September 12, 1971

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 12, 1971
- Place: Chugiak, AK · CHUGIAK, AK
- Location: 61.3889° N, 149.4819° W: Placed by OpenAirDocs: center of Chugiak, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=61.3889&lon=-149.4819&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 5, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 163782
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC72DAG56
- Page: https://openairdocs.org/ntsb/ANC72DAG56

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3677  71/9/12    CHUGIAK,ALAS        PIPER PA-18         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1230                    N4579A              PX-  0  0  0  DUAL                      AGE 28, 762 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            1 IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - BIRCHWOOD
        DEPARTURE POINT             INTENDED DESTINATION
          CHUGIAK,ALAS                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           STALL                                                    LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
        FACTOR(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  SMOKE IN COCKPIT
        REMARKS- ENG OIL FILLER CAP BECAME LOOSE SPILLING OIL ON EXH MANIFOLD SMOKE ENTERED COCKPIT.
```

## Aircraft

- Registration: [N4579A](https://openairdocs.org/aircraft/N4579A), registered now, S/N 18-4885, built 1956 (OpenAirDocs)
- Reported make and model: PIPER PA-18
- Registry model: [Piper PA-18](https://openairdocs.org/model/piper-pa-18) (registry code 7101802) (OpenAirDocs)
- Registry engine: [Continental C90 series](https://openairdocs.org/engine/continental-c90-series) (registry code 17009, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Birchwood

## Other investigations on N4579A (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 ANC89LA180](https://openairdocs.org/ntsb/ANC89LA180), Oct 1, 1989: Piper PA-18 (N4579A), Windy Fork, AK, substantial damage. Probable cause: IMPROPER PLANNING/DECISION BY THE PILOT.

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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