# NTSB FTW75FPM16: Willie II, N113BT, Tulsa, OK, April 21, 1975

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 21, 1975
- Place: Tulsa, OK · TULSA, OK
- Location: 36.1540° N, 95.9928° W: Placed by OpenAirDocs: center of Tulsa, OK, within about 8 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.1540&lon=-95.9928&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 15, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 148606
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW75FPM16
- Page: https://openairdocs.org/ntsb/FTW75FPM16

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0845  75/4/21    TULSA,OK            WILLIE II           CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 49, 2000
        TIME - 1700                    N113BT              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 3 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - HARVEY YOUNG
        DEPARTURE POINT             INTENDED DESTINATION
          TULSA,OK                    LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE CONTROLS: THROTTLE-POWER LEVER ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - DISCONNECTED
        FACTOR(S)
           TERRAIN - ROUGH/UNEVEN
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         FIRE AFTER IMPACT
        REMARKS- THROTTLE BELLCRANK BOLT FAILED AT COTTER PIN HOLE.ENG WENT TO IDLE POS.
```

## Aircraft

- Registration: [N113BT](https://openairdocs.org/deregistered/N113BT-2013-01-30), registration cancelled 2013-01-30, S/N 52925, built 1975 (OpenAirDocs)
- Reported make and model: WILLIE II
- Registry model: [Turner WILLIE II](https://openairdocs.org/model/turner-willie-ii) (registry code 0565504) (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: Destroyed
- Airport: Harvey Young

## 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 19750421008039A](https://openairdocs.org/incident/19750421008039A), Apr 21, 1975: Amtr 0565504, Tulsa, OK, Substantial damage. Throttle bellcrank bolt failed at cotter pin hole. Eng went to idle pos.

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.