# NTSB UNK64X1857: Aero Comm 520, N4108B, Indianapolis, IN, May 20, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 20, 1964
- Place: Indianapolis, IN · INDIANAPOLIS, IN
- Location: 39.7684° N, 86.1580° W: Placed by OpenAirDocs: center of Indianapolis, IN, within about 11 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.7684&lon=-86.1580&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 23, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 184015
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X1857
- Page: https://openairdocs.org/ntsb/UNK64X1857

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1344  64/5/20    INDIANAPOLIS IND    AERO COMM 520       CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 46, 7451
        TIME - 0940                    N4108B              PX-  0  0  1  BUSINESS                  TOTAL HOURS, 152 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - WEIR COOK
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR COLLAPSED                                           TAXI: TO TAKEOFF
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: NOSEWHEEL ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - VIBRATION,EXCESSIVE
        REMARKS- TORQUE KNEE SCISSORS FAILED
```

## Aircraft

- Registration: [N4108B](https://openairdocs.org/deregistered/N4108B-2012-06-04), registration cancelled 2012-06-04, S/N 520-9, built 1952 (OpenAirDocs)
- Reported make and model: AERO COMM 520
- Registry model: [Aero Commander 520](https://openairdocs.org/model/aero-commander-520) (registry code 0141202) (OpenAirDocs)
- Registry engine: [Lycoming GO-435C&D series](https://openairdocs.org/engine/lycoming-go-435c-d-series) (registry code 41521, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Weir Cook

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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