# NTSB SEA72DT117: Piper PA-18, N1447A, Plains, MT, April 29, 1972

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 29, 1972
- Place: Plains, MT · PLAINS, MT
- Location: 47.4602° N, 114.8842° W: Placed by OpenAirDocs: center of Plains, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.4602&lon=-114.8842&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report January 3, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 117464
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA72DT117
- Page: https://openairdocs.org/ntsb/SEA72DT117

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0993  72/4/29    PLAINS,MONT         PIPER PA-18         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1830                    N1447A              PX-  0  0  0  DUAL                      AGE 29, 284 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            18 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - PLAINS
        DEPARTURE POINT             INTENDED DESTINATION
          PLAINS,MONT                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           OVERSHOOT                                                LANDING: LEVEL OFF/TOUCHDOWN
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - SELECTED WRONG RUNWAY RELATIVE TO EXISTING WIND
           PILOT IN COMMAND - MISJUDGED DISTANCE AND SPEED
           MISCELLANEOUS - EVASIVE MANEUVER TO AVOID COLLISION
           MISCELLANEOUS ACTS,CONDITIONS - INTENTIONAL GROUND-WATER-LOOP-SWERVE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - DOWNWIND
           WEATHER - SUDDEN WINDSHIFT
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          UNKNOWN/NOT REPORTED                                      9000
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  RELATIVE BEARING OF WIND
          NONE                                                     TAIL WIND 158-202 DEGREES
        TEMPERATURE-F                                            WIND VELOCITY-KNOTS
           45                                                       15
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- GUSTING TO 20K. IP GROUND LOOPED TO AVOID FENCE AT END OF RWY.
```

## Aircraft

- Registration: [N1447A](https://openairdocs.org/deregistered/N1447A-2019-01-14), registration cancelled 2019-01-14, S/N 18-1834, built 1952 (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: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Plains

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.