# NTSB FTW72AF011: Piper PA-18, N9571D, Broken Bow, OK, August 21, 1971

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: August 21, 1971
- Place: Broken Bow, OK · BROKEN BOW, OK
- Location: 34.0289° N, 94.7414° W: Placed by OpenAirDocs: center of Broken Bow, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.0289&lon=-94.7414&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report April 12, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 162132
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW72AF011
- Page: https://openairdocs.org/ntsb/FTW72AF011

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3296  71/8/21    BROKEN BOW,OKLA     PIPER PA-18         CR-  1  0  0  NONCOMMERCIAL             PRIVATE, AGE 54, 1800
        TIME - UNK/NR                  N9571D              PX-  1  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, UNK/NR IN
                                       DAMAGE-DESTROYED    OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - BROKEN BOW
        DEPARTURE POINT             INTENDED DESTINATION
          BROKEN BOW,OKLA             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: OTHER
           STALL                                                    LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
           TERRAIN - HIGH OBSTRUCTIONS
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        MISSING AIRCRAFT - LATER RECOVERED
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         FIRE AFTER IMPACT
        REMARKS- RECOVERY DATE 8/22/71. INTERNAL FAILURE OF ENG. CRASHED IN FLD SURROUNDED BY TALL TREES.
```

## Aircraft

- Registration: [N9571D](https://openairdocs.org/deregistered/N9571D-1971-10-07), registration cancelled 1971-10-07, S/N 18-6753, built 1958 (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: Destroyed
- Airport: Broken Bow

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.