# NTSB UNK64X2564: Bell 47J2, N8499E, Waltham, MA, June 29, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 29, 1964
- Place: Waltham, MA · WALTHAM, MA
- Location: 42.3888° N, 71.2419° W: Placed by OpenAirDocs: center of Waltham, MA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.3888&lon=-71.2419&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report December 21, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 183691
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X2564
- Page: https://openairdocs.org/ntsb/UNK64X2564

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0699  64/6/29    WALTHAM MASS        BELL 47J2           CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 36, 8500
        TIME - 1254                    N8499E              PX-  0  0  3  AIR TAXI-PASSG            TOTAL HOURS, 1000 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      IN FLIGHT: NORMAL CRUISE
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
           ROTORCRAFT - FLIGHT CONTROL SYSTEMS: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  PITCH CONTROL PROBLEM
        REMARKS- FAILURE WAS MAST CONTROL STABILIZER BAR
```

## Aircraft

- Registration: [N8499E](https://openairdocs.org/deregistered/N8499E-1972-12-19), registration cancelled 1972-12-19, S/N 1848 (OpenAirDocs)
- Reported make and model: BELL 47J2
- Registry model: [Bell 47J-2](https://openairdocs.org/model/bell-47j-2) (registry code 1181104) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N8499E (2)

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 OAK72FJY15](https://openairdocs.org/ntsb/OAK72FJY15), May 20, 1972: Bell 47J-2 (N8499E), Piti Village, GU, substantial damage
- [NTSB NYC66A0135](https://openairdocs.org/ntsb/NYC66A0135), May 23, 1966: Bell 47J-2 (N8499E), Burlington, MA, substantial 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.

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