# NTSB OAK76FJA05: Brantly 305, N2224U, Honolulu, HI, November 21, 1975

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: November 21, 1975
- Place: Honolulu, HI · HONOLULU, HI
- Location: 21.3069° N, 157.8583° W: Placed by OpenAirDocs: center of Honolulu, HI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=21.3069&lon=-157.8583&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 3 minor
- Status: Completed, report January 6, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 151767
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK76FJA05
- Page: https://openairdocs.org/ntsb/OAK76FJA05

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3669  75/11/21   HONOLULU,HI         BRANTLY 305         CR-  0  1  0  COMMERCIAL                COMMERCIAL, AGE 41, 1077
        TIME - 1520                    N2224U              PX-  0  0  3  CTR PASSG-D               TOTAL HOURS, 3 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - ALA WAI
        DEPARTURE POINT             INTENDED DESTINATION
          HONOLULU,HI                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      TAKEOFF: VERTICAL
           COLLISION WITH GROUND/WATER: CONTROLLED                  LANDING: POWER-ON LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON WATER
        REMARKS- TAIL ROTOR DRIVE FAILURE,UNDETERMINED REASONS.ACFT LANDED IN WATER OFF BEACH.
```

## Aircraft

- Registration: [N2224U](https://openairdocs.org/deregistered/N2224U-1976-01-14), registration cancelled 1976-01-14, S/N 1039, built 1966 (OpenAirDocs)
- Reported make and model: BRANTLY 305
- Registry model: [Brantly 305](https://openairdocs.org/model/brantly-305) (registry code 1440602) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Ala Wai

## 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 19751121038079A](https://openairdocs.org/incident/19751121038079A), Nov 21, 1975: Hynes 305BRNTLY, Honolulu, HI, Destroyed. Tail rotor drive failure,undetermined reasons. Acft landed in water off beach.

## Other investigations on N2224U (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 MKC68A0057](https://openairdocs.org/ntsb/MKC68A0057), Mar 23, 1968: Brantly 305 (N2224U), St Louis, MO, substantial damage, 3 fatal

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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