# NTSB DEN80FTI10: Piper PA-30, N8817Y, Great Falls, MT, June 22, 1980

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 22, 1980
- Place: Great Falls, MT · GREAT FALLS, MT
- Location: 47.5025° N, 111.3000° W: Placed by OpenAirDocs: center of Great Falls, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.5025&lon=-111.3000&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report August 7, 1980
- Report: Brief approved by the director
- NTSB case key (mKey): 130973
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN80FTI10
- Page: https://openairdocs.org/ntsb/DEN80FTI10

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1326  80/6/22    GREAT FALLS,MT      PIPER PA-30         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 63, 2901
        TIME - 0918                    N8817Y              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 2619 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, INSTRUMENT RATED.
        NAME OF AIRPORT - GREAT FALLS INTL
        DEPARTURE POINT             INTENDED DESTINATION
          GREAT FALLS,MT              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           WHEELS-UP                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO ASSURE THE GEAR WAS DOWN AND LOCKED
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPER EMERGENCY PROCEDURES
           PILOT IN COMMAND - ATTEMPTED OPERATION W/KNOWN DEFICIENCIES IN EQUIPMENT
           SYSTEMS - ELECTRICAL SYSTEM: GENERATORS/ALTERNATORS
           MISCELLANEOUS ACTS,CONDITIONS - EXCESSIVE-WEAR/PLAY
           MISCELLANEOUS ACTS,CONDITIONS - ELECTRICAL FAILURE
        REMARKS- BOTH ALTNRS INOP-1620HRS W NO MAINT HISTORY.PTLY CHRGD BTRY WENT DEAD DRG G EXTN.G RETD DRG LNDG.
```

## Aircraft

- Registration: [N8817Y](https://openairdocs.org/aircraft/N8817Y), registered now, S/N 30-1975, built 1969 (OpenAirDocs)
- Reported make and model: PIPER PA-30
- Registry model: [Piper PA-30](https://openairdocs.org/model/piper-pa-30) (registry code 7103002) (OpenAirDocs)
- Registry engine: [Lycoming IO-320 series](https://openairdocs.org/engine/lycoming-io-320-series) (registry code 41509, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Great Falls Intl

## 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 19800622021879A](https://openairdocs.org/incident/19800622021879A), Jun 22, 1980: Piper PA30, Great Falls, MT, Substantial damage. Electrical power failure due to worn out alternators. Gear extended, not locked down. Failed to use manual extension

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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