# NTSB LAX71DUJ73: Ryan ST-3KR, N721R, Scottsdale, AZ, April 4, 1971

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 4, 1971
- Place: Scottsdale, AZ · SCOTTSDALE, AZ
- Location: 33.5092° N, 111.8990° W: Placed by OpenAirDocs: center of Scottsdale, AZ, within about 8 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.5092&lon=-111.8990&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 22, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 160955
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX71DUJ73
- Page: https://openairdocs.org/ntsb/LAX71DUJ73

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1288   71/4/4    SCOTTSDALE,ARIZ     RYAN ST-3KR         CR-  0  0  1  NONCOMMERCIAL             ATP,FLIGHT INSTR., AGE
        TIME - 1640                    N721R               PX-  0  0  1  PLEASURE/PERSONAL TRANSP  34, 3484 TOTAL HOURS, 11
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - SCOTTSDALE
        DEPARTURE POINT             INTENDED DESTINATION
          MESA,ARIZ                   SCOTTSDALE,ARIZ
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           COLLISION WITH GROUND/WATER: CONTROLLED                  LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           POWERPLANT - MISCELLANEOUS: POWERPLANT FAILURE FOR UNDETERMINED REASONS
           AIRPORTS/AIRWAYS/FACILITIES - AIRPORT CONDITIONS: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - CONGESTED TRAFFIC-PATTERN
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
        REMARKS- ABORTED DOWNWIND LDG ATMT,TRAFFIC.HIT SHORT OF RWY.ENG NOT INSPECTED.
```

## Aircraft

- Registration: [N721R](https://openairdocs.org/aircraft/N721R), registered now, S/N 1840, built 1942 (OpenAirDocs)
- Reported make and model: RYAN ST-3KR
- Registry model: [Ryan Aeronautical ST3KR](https://openairdocs.org/model/ryan-aeronautical-st3kr) (registry code 7830502) (OpenAirDocs)
- Registry engine: [Fairchild 6-440-C5](https://openairdocs.org/engine/fairchild-6-440-c5) (registry code 26008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Scottsdale

## Other investigations on N721R (2)

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 CEN12LA369](https://openairdocs.org/ntsb/CEN12LA369), Jun 8, 2012: Ryan Aeronautical ST3KR (N721R), Norwalk, OH, substantial damage. Probable cause: The pilot’s failure to maintain directional control of the airplane while landing in a crosswind.
- [NTSB LAX83FA240](https://openairdocs.org/ntsb/LAX83FA240), May 21, 1983: Ryan PT-22/ST-3KR (N721R), Mesa, AZ, destroyed, 2 fatal

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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