# NTSB OAK69F0230: Brantly B-2B, N2170U, Benicia, CA, February 1, 1969

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: February 1, 1969
- Place: Benicia, CA · BENICIA, CA
- Location: 38.0727° N, 122.1552° W: Placed by OpenAirDocs: center of Benicia, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.0727&lon=-122.1552&mi=10
- Phase of flight: [Uncontrolled descent](https://openairdocs.org/ntsb-phases/650) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 1 uninjured
- Status: Completed, report May 6, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 191642
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK69F0230
- Page: https://openairdocs.org/ntsb/OAK69F0230

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0218   69/2/1    BENICIA,CALIF       BRANTLY B-2B        CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 66, 2579
        TIME - 1200                    N2170U              PX-  0  0  1  DEMONSTRATION             TOTAL HOURS, 53 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           MISCELLANEOUS - EVASIVE MANEUVER TO AVOID COLLISION
           WEATHER - UNFAVORABLE WIND CONDITIONS
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          UNKNOWN/NOT REPORTED                                      3000
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      55
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          240                                                       20
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- PLT TURNED DOWN WIND,20K,TO AVOID CHILDREN.PLT ATTEMPTED TO T/O BEFORE TRANSLATIONAL LIFT EFFECT.
```

## Aircraft

- Registration: [N2170U](https://openairdocs.org/deregistered/N2170U-1971-09-28), registration cancelled 1971-09-28, S/N 332, built 1963 (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: Destroyed

## Other investigations on N2170U (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 DEN66A0003](https://openairdocs.org/ntsb/DEN66A0003), Jul 3, 1965: Brantly B2B (N2170U), Phoenix, AZ, substantial damage
- [NTSB UNK64X1834](https://openairdocs.org/ntsb/UNK64X1834), May 18, 1964: Brantly B2B (N2170U), Tulsa, OK, destroyed

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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