# NTSB LAX77FUJ72: Bell 206B, N99MC, Grand Canyon, AZ, July 12, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 12, 1977
- Place: Grand Canyon, AZ · GRAND CANYON, AZ
- Location: 36.0544° N, 112.1393° W: Placed by OpenAirDocs: center of Grand Canyon, AZ, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.0544&lon=-112.1393&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 16, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 146156
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX77FUJ72
- Page: https://openairdocs.org/ntsb/LAX77FUJ72

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1867  77/7/12    GRAND CANYON,AZ     BELL 206B           CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, FL.INSTR.,
        TIME - 1121                    N99MC               PX-  0  0  0  OTHER PUBLIC              AGE 46, 12775 TOTAL
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            HOURS, 700 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          GRAND CANYON,AZ             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: VERTICAL
           COLLIDED WITH: TREES                                     LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - COMBUSTION ASSEMBLY: SEALS,EXPANSION
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- 2ND STAGE GAS PRODUCER SEALS SEIZED.
```

## Aircraft

- Registration: N99MC (not matched to a registry record)
- Reported make and model: BELL 206B
- Category: Helicopter
- Engines: turbo shaft
- 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 19770712023789A](https://openairdocs.org/incident/19770712023789A), Jul 12, 1977: Bell 206B, Grand Canyon, AZ, Substantial damage. 2Nd stage gas producer seals seized.

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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