# NTSB MKC77FA003: Beech B99, N8099R, Spencer, IA, November 19, 1976

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: November 19, 1976
- Place: Spencer, IA · SPENCER, IA
- Location: 43.1470° N, 95.1527° W: Placed by OpenAirDocs: center of Spencer, IA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.1470&lon=-95.1527&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 1 uninjured
- Status: Completed, report April 11, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 156520
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC77FA003
- Page: https://openairdocs.org/ntsb/MKC77FA003

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4000  76/11/19 NR.SPENCER,IA         BEECH B99           CR-  0  1  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0310                    N8099R              PX-  0  0  0  COMMUTER AIR CARRIER      AGE 24, 2300 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0  AIR TAXI-PASSG S-D        400 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          MINNEAPOLIS,MN             SPENCER,IA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: DESCENDING
           PROPELLER/ROTOR ACCIDENT TO PERSON                       IN FLIGHT: DESCENDING
        PROBABLE CAUSE(S)
           POWERPLANT - REDUCTION GEAR ASSEMBLY: GEARS,REDUCTION
           POWERPLANT - TURBINE ASSEMBLY: WHEEL TURBINE
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        REMARKS- FAILURE 2ND STAGE PLANETARY GEAR. ENG PWR TURBINE DISCONNECTED AND FLYING BLADE STRUCK PILOT.
```

## Aircraft

- Registration: N8099R (not matched to a registry record)
- Reported make and model: BEECH B99
- Category: Airplane
- Engines: turbo prop
- Damage: Substantial damage

## 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 19761119039409A](https://openairdocs.org/incident/19761119039409A), Nov 19, 1976: Beech 99, Spencer, IA, Substantial damage. Failure 2nd stage planetary gear. Eng pwr turbine disconnected and flying blade struck pilot.

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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