# NTSB SEA74AYE04: Bell 47D, N964B, Anacortes, WA, July 7, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 7, 1973
- Place: Anacortes, WA · ANACORTES, WA
- Location: 48.4887° N, 122.6240° W: Placed by OpenAirDocs: center of Anacortes, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=48.4887&lon=-122.6240&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 22, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 188946
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA74AYE04
- Page: https://openairdocs.org/ntsb/SEA74AYE04

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2998   73/7/7    ANACORTES,WASH      BELL 47D            CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0700                    N964B               PX-  0  0  0  AERIAL APPLICATION        AGE 24, 1875 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            114 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - BAYVIEW
        DEPARTURE POINT             INTENDED DESTINATION
          BURLINGTON,WASH             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: PULLUP FROM SWATH RUN
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: TAIL ROTOR BLADES
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
           PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  DIRECTIONAL CONTROL PROBLEM
                                  SUSPECTED OR KNOWN AIRCRAFT DAMAGE
         SPECIAL DATA
          KIND OF OPERATION - SPRAYING CROPS
        REMARKS- FATIGUE-T/R BLADE YOKE P/N 47-641-057-9.PLT MAINTAINED CONTROL 2 MIN.
```

## Aircraft

- Registration: [N964B](https://openairdocs.org/deregistered/N964B-2013-03-20), registration cancelled 2013-03-20, S/N 1298, built 1954 (OpenAirDocs)
- Reported make and model: BELL 47D
- Registry model: [Bell 47D1](https://openairdocs.org/model/bell-47d1) (registry code 1180802) (OpenAirDocs)
- Registry engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Bayview

## 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 19730707021089A](https://openairdocs.org/incident/19730707021089A), Jul 7, 1973: Bell 47D1, Anacortes, WA, Substantial damage. Fatigue-t/r blade yoke p/n 47-641-057-9.plt maintained control 2 min.

## Other investigations on N964B (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 SEA70F0019](https://openairdocs.org/ntsb/SEA70F0019), Jun 18, 1969: Bell 47G (N964B), Stanwood, WA, 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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