# NTSB MKC74DCD28: Piper PA-20, N7420K, Waterloo, IA, April 26, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 26, 1974
- Place: Waterloo, IA · WATERLOO, IA
- Location: 42.4928° N, 92.3430° W: Placed by OpenAirDocs: center of Waterloo, IA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.4928&lon=-92.3430&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report June 11, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 186224
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC74DCD28
- Page: https://openairdocs.org/ntsb/MKC74DCD28

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0984  74/4/26    WATERLOO,IOWA       PIPER PA-20         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1700                    N7420K              PX-  0  0  0  DUAL                      AGE 28, 2150 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            26 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - WATERLOO MUNI
        DEPARTURE POINT             INTENDED DESTINATION
          WATERLOO,IOWA               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           NOSE OVER/DOWN                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL
           AIRFRAME - LANDING GEAR: TAILWHEEL ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - TOUCH AND GO LANDING
        REMARKS- TAILWHEEL MOUNTING BOLT FAILED.
```

## Aircraft

- Registration: [N7420K](https://openairdocs.org/aircraft/N7420K), registered now, S/N 20-330, built 1950 (OpenAirDocs)
- Reported make and model: PIPER PA-20
- Registry model: [Piper PA-20-115](https://openairdocs.org/model/piper-pa-20-115) (registry code 7102006) (OpenAirDocs)
- Registry engine: [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series) (registry code 41505, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Waterloo Muni

## 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 19740426010089A](https://openairdocs.org/incident/19740426010089A), Apr 26, 1974: Piper PA20115, Waterloo, IA, Substantial damage. Tailwheel mounting bolt failed.

## Other investigations on N7420K (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 MKC79DCJ05](https://openairdocs.org/ntsb/MKC79DCJ05), Dec 11, 1978: Piper PA-20 (N7420K), Brunswick, NE, 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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