# NTSB SEA67A0032: Bell 47D1, N162B, Llensburg, WA, October 11, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 11, 1966
- Place: Llensburg, WA · LLENSBURG, WA
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 22, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 120961
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA67A0032
- Page: https://openairdocs.org/ntsb/SEA67A0032

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-1001  66/10/11   LLENSBURG WASH      BELL 47D1           CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 41, 200
        TIME - 1730                    N162B               PX-  0  0  1  BUSINESS                  TOTAL HOURS, ALL IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
          ROTORCFT-T/R HUB RETENTION BOLT PN 47-641-052-3.
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  SUSPECTED OR KNOWN AIRCRAFT DAMAGE
        REMARKS- NO DAMAGE DURING LANDING.
```

## Aircraft

- Registration: [N162B](https://openairdocs.org/deregistered/N162B-2010-06-02), registration cancelled 2010-06-02, S/N 16 (OpenAirDocs)
- Reported make and model: BELL 47D1
- Registry model: [Bell 47D1](https://openairdocs.org/model/bell-47d1) (registry code 1180802) (OpenAirDocs)
- Registry engine: [Franklin 6A4200 series](https://openairdocs.org/engine/franklin-6a4200-series) (registry code 27027, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N162B (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 LAX93LA010](https://openairdocs.org/ntsb/LAX93LA010), Oct 11, 1992: Bell 47-D1 (N162B), El Monte, CA, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN THE ROTOR RPM.

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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