# NTSB CHI72FEM23: Bell 47G2, N10NR, Manistee, MI, September 4, 1971

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 4, 1971
- Place: Manistee, MI · MANISTEE, MI
- Location: 44.2449° N, 86.3277° W: Placed by OpenAirDocs: center of Manistee, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.2449&lon=-86.3277&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report April 10, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 163357
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI72FEM23
- Page: https://openairdocs.org/ntsb/CHI72FEM23

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3252   71/9/4    MANISTEE,MICH       BELL 47G2           CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 38, 2475
        TIME - 1540                    N10NR               PX-  0  0  1  MAPPING/PHOTO             TOTAL HOURS, 61 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          MANISTEE,MICH               PLATTE RIVER,MICH
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: CONTROLLED                  IN FLIGHT: OTHER
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           INSTRUMENTS/EQUIPMENT AND ACCESSORIES - FLIGHT AND NAVIGATION INSTRUMENTS: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER
        REMARKS- PLT LOST RPM TACK 10 MIN PRIOR TO ACDNT,LOST RPM WHILE OVER LAKE,SKIDS CTCD WTR,LOST DRCTNL CTL.
```

## Aircraft

- Registration: [N10NR](https://openairdocs.org/deregistered/N10NR-1971-10-05), registration cancelled 1971-10-05, S/N 2525 (OpenAirDocs)
- Reported make and model: BELL 47G2
- Registry model: [Bell 47G-2](https://openairdocs.org/model/bell-47g-2) (registry code 1181008) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Destroyed

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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