# NTSB SEA7LFTI05: Amer Avco AA1-B, N9618L, Butte, MT, August 6, 1975

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: August 6, 1975
- Place: Butte, MT · BUTTE, MT
- Location: 46.0038° N, 112.5347° W: Placed by OpenAirDocs: center of Butte, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.0038&lon=-112.5347&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 1 minor
- Status: Completed, report September 26, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 150165
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA7LFTI05
- Page: https://openairdocs.org/ntsb/SEA7LFTI05

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2417   75/8/6    BUTTE,MT            AMER AVCO AA1-B     CR-  0  1  1  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 2000                    N9618L              PX-  0  0  0  DUAL                      AGE 34, 375 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            8 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          BUTTE,MT                    LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: WIRES/POLES                               LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OBJECTS OR OBSTRUCTIONS
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
        REMARKS- PWR LINE NEAR HWY. SIMULATED FORCED LDG.
```

## Aircraft

- Registration: [N9618L](https://openairdocs.org/deregistered/N9618L-1975-10-02), registration cancelled 1975-10-02, S/N AA1B0118 (OpenAirDocs)
- Reported make and model: AMER AVCO AA1-B
- Registry model: [Grumman American Avn. AA-1B](https://openairdocs.org/model/grumman-american-avn-aa-1b) (registry code 3960103) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed

## 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 19750806025909A](https://openairdocs.org/incident/19750806025909A), Aug 6, 1975: Grumav AA1B, Butte, MT, Destroyed. Pwr line near hwy. simulated forced ldg.

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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