# NTSB OAK66A0048: Brantly B-2B, N2196U, 4 Se Rodeo, CA, April 20, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 20, 1966
- Place: 4 Se Rodeo, CA · 4 SE RODEO, CA
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 25, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 172408
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK66A0048
- Page: https://openairdocs.org/ntsb/OAK66A0048

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0325  66/4/20    4 SE RODEO CALIF    BRANTLY B-2B        CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 38, 90 TOTAL
        TIME - 1130                    N2196U              PX-  0  0  0  PRACTICE                  HOURS, 16 IN TYPE, NOT
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      IN FLIGHT: NORMAL CRUISE
           STALL: SPIN                                              LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: BEARINGS
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - LACK OF LUBRICATION-SPECIFIC PART,NOT SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - BINDING
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING OFF AIRPORT
                                  SUSPECTED MECHANICAL DISCREPANCY
                                  UNUSUAL NOISE
        REMARKS- INNER FAFNIR BEARING PN B546DD DRY.
```

## Aircraft

- Registration: [N2196U](https://openairdocs.org/aircraft/N2196U), registered now, S/N 407, built 1964 (OpenAirDocs)
- Reported make and model: BRANTLY B-2B
- Registry model: [Brantly B-2B](https://openairdocs.org/model/brantly-b-2b) (registry code 1440506) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: 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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.