# NTSB CHI75AC034: Beech 99, N140J, Jackson, MI, October 23, 1974

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: October 23, 1974
- Place: Jackson, MI · JACKSON, MI
- Location: 42.2434° N, 84.4049° W: Placed by OpenAirDocs: center of Jackson, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.2434&lon=-84.4049&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious, 1 minor, 14 uninjured
- Status: Completed, report April 18, 1975
- Report: Brief approved by the director
- Safety recommendations: Yes
- NTSB case key (mKey): 79389
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI75AC034
- Page: https://openairdocs.org/ntsb/CHI75AC034

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4317  74/10/23   JACKSON,MICH        BEECH 99            CR-  0  2  0  COMMERCIAL                AIRLINE TRANSPORT, AGE
        TIME - 1027                    N140J               PX-  0  0 15  COMMUTER AIR CARRIER      29, 3500 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0  AIR TAXI-PASSG S-D        2500 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          DETROIT,MICH                RETURN                       CHICAGO,ILL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           POWERPLANT - REDUCTION GEAR ASSEMBLY: BEARING,REDUCTION GEAR
           POWERPLANT - TURBINE ASSEMBLY: BLADE,TURBINE WHEEL
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
        REMARKS- 1ST STAGE REDUCTION PLANET GR FAILED CAUSING PWR TURBINE DISC DECOUPLE.FRAGMENTS INJURED BOTH PLTS
```

## Aircraft

- Registration: [N140J](https://openairdocs.org/deregistered/N140J-1975-05-28), registration cancelled 1975-05-28, S/N BA-334 (OpenAirDocs)
- Reported make and model: BEECH 99
- Registry model: [Beech E18S](https://openairdocs.org/model/beech-e18s) (registry code 1151006) (OpenAirDocs)
- Category: Airplane
- Engines: turbo prop
- Damage: Substantial damage

## Other investigations on N140J (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 CHI75AC074](https://openairdocs.org/ntsb/CHI75AC074), Apr 1, 1975: Beech E18S (N140J), Argos, IN, destroyed, 1 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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