# NTSB MKC76DTK04: Waco UPF-7, N29974, N Sioux City, SD, August 30, 1975

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 30, 1975
- Place: N Sioux City, SD · N SIOUX CITY, SD
- Location: 42.5359° N, 96.4947° W: Placed by OpenAirDocs: center of North Sioux City, SD, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.5359&lon=-96.4947&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 29, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 150866
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC76DTK04
- Page: https://openairdocs.org/ntsb/MKC76DTK04

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2731  75/8/30    N SIOUX CITY,SD     WACO UPF-7          CR-  0  0  1  NONCOMMERCIAL             ATP,FLIGHT INSTR., AGE
        TIME - 1545                    N29974              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  34, 7418 TOTAL HOURS, 2
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - GRAHAM FIELD
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          SIOUX CITY,IA               RETURN                       NORTH SIOUX CITY,SD
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 TAKEOFF: RUN
           COLLIDED WITH: CROP                                      TAKEOFF: RUN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL
           PILOT IN COMMAND - LACK OF FAMILIARITY WITH AIRCRAFT
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
        REMARKS- PLT RAISED THE TAIL OF THE ACFT TOO RAPIDLY.
```

## Aircraft

- Registration: [N29974](https://openairdocs.org/aircraft/N29974), registered now, S/N 5471, built 1940 (OpenAirDocs)
- Reported make and model: WACO UPF-7
- Registry model: [Waco UPF-7](https://openairdocs.org/model/waco-upf-7) (registry code 9601302) (OpenAirDocs)
- Registry engine: [Jacobs L4 /R755-7](https://openairdocs.org/engine/jacobs-l4-r755-7) (registry code 35003, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Graham Field

## 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 19750830028459A](https://openairdocs.org/incident/19750830028459A), Aug 30, 1975: Waco UPF7, N Sioux City, SD, Substantial damage. Plt raised the tail of the acft too rapidly.

## Other investigations on N29974 (1)

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 LAX96LA292](https://openairdocs.org/ntsb/LAX96LA292), Jul 30, 1996: Waco UPF7 (N29974), Payson, AZ, substantial damage. Probable cause: the failure of the pilot to maintain directional control on touchdown and the landing ground roll.

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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