# NTSB SEA68D0002: Piper PA-18, N3981Z, Lincoln, MT, June 11, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 11, 1967
- Place: Lincoln, MT · LINCOLN, MT
- Location: 46.9534° N, 112.6715° W: Placed by OpenAirDocs: center of Lincoln, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.9534&lon=-112.6715&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 21, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 116627
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA68D0002
- Page: https://openairdocs.org/ntsb/SEA68D0002

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1867  67/6/11    LINCOLN, MONT       PIPER PA-18         CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 40, 312
        TIME - 1645                    N3981Z              PX-  0  0  0  BUSINESS                  TOTAL HOURS, 5 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - LINCOLN
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           COLLIDED WITH: FENCE,FENCEPOSTS                          LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF BRAKES AND/OR FLIGHT CONTROLS
```

## Aircraft

- Registration: [N3981Z](https://openairdocs.org/aircraft/N3981Z), registered now, S/N 18-7924, built 1963 (OpenAirDocs)
- Reported make and model: PIPER PA-18
- Registry model: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (registry code 7101828) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Lincoln

## Other investigations on N3981Z (2)

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 MIA98LA226](https://openairdocs.org/ntsb/MIA98LA226), Aug 15, 1998: Piper PA-18-150 (N3981Z), Conway, SC, substantial damage. Probable cause: The total failure of the left wing forward and aft attachment fitting due to corrosion and fatigue during a banner tow pick-up resulting in a subsequent in-flight collision with terrain.
- [NTSB DEN81DTI03](https://openairdocs.org/ntsb/DEN81DTI03), Jan 27, 1981: Piper PA-18 (N3981Z), Cascade, MT, substantial damage

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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