# NTSB MKC76IK006: Convair 580, N4801C, Sioux City, IA, July 9, 1975

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: July 9, 1975
- Place: Sioux City, IA · SIOUX CITY, IA
- Location: 42.5000° N, 96.4003° W: Placed by OpenAirDocs: center of Sioux City, IA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.5000&lon=-96.4003&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 22 uninjured
- Status: Completed, report January 14, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 150397
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC76IK006
- Page: https://openairdocs.org/ntsb/MKC76IK006

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0027   75/7/9  NR.SIOUX CITY,IA      CONVAIR 580         CR-  0  0  3  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 0934                    N4801C              PX-  0  0 19                            42, 13000 TOTAL HOURS,
                                       DAMAGE-MINOR        OT-  0  0  0                            3091 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        OPERATOR - NORTH CENTRAL AIRLINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
         SIOUX CITY,IA                SIOUX FALLS,SD
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           FIRE OR EXPLOSION: IN FLIGHT                             IN FLIGHT: CLIMB TO CRUISE
        PROBABLE CAUSE(S)
           POWERPLANT - TURBINE ASSEMBLY: WHEEL TURBINE
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  SUSPECTED OR KNOWN AIRCRAFT DAMAGE
        REMARKS- 2ND STAGE TURBINE WHEEL (S/N KK15491) FRACTURED RESULTING IN UNCONTAINED TURBINE FAILURE.
```

## Aircraft

- Registration: N4801C (not matched to a registry record)
- Reported make and model: CONVAIR 580
- Category: Airplane
- Engines: turbo prop
- Damage: Minor 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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.