# NTSB SEA80FA041: Cessna R172K, N736UN, Renton, WA, August 11, 1980

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 11, 1980
- Place: Renton, WA · RENTON, WA
- Location: 47.4795° N, 122.1949° W: Placed by OpenAirDocs: center of Renton, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.4795&lon=-122.1949&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 29, 1980
- Report: Brief approved by the director
- NTSB case key (mKey): 129420
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA80FA041
- Page: https://openairdocs.org/ntsb/SEA80FA041

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1856  80/8/11    RENTON,WA           CESSNA R172K        CR-  0  0  2  MISCELLANEOUS             ATP,FLIGHT INSTR., AGE
        TIME - 1121                    N736UN              PX-  0  0  0  TEST                      43, 10000 TOTAL HOURS, 20
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - ROGERS-POST SPB
        DEPARTURE POINT             INTENDED DESTINATION
          RENTON,WA                   LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR COLLAPSED                                           TAXI: OTHER
        PROBABLE CAUSE(S)
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: POOR/INADEQUATE DESIGN
           AIRFRAME - LANDING GEAR: FLOAT ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - BENT
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        REMARKS- STC CERTIFICATION FOR FLOAT EQUIPMENT. LEFT FRONT STRUTS FAILED DURING STEP TAXI TURN.
```

## Aircraft

- Registration: [N736UN](https://openairdocs.org/deregistered/N736UN-1989-05-01), registration cancelled 1989-05-01, S/N R1722800 (OpenAirDocs)
- Reported make and model: CESSNA R172K
- Registry model: [Cessna R172K](https://openairdocs.org/model/cessna-r172k) (registry code 2072431) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Rogers-Post Spb

## 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 19800811036199A](https://openairdocs.org/incident/19800811036199A), Aug 11, 1980: Cessna R172K, Renton, WA, Substantial damage. Testing new type of seaplane float attachment. Strut failed in high speed water turn. Rough water in area.

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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