# NTSB FTW76FPJ18: Brantly B2B, N2180U, Frederick, OK, December 9, 1975

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: December 9, 1975
- Place: Frederick, OK · FREDERICK, OK
- Location: 34.3500° N, 98.9880° W: Placed by OpenAirDocs: center of Frederick, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.3500&lon=-98.9880&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report January 13, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 151779
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW76FPJ18
- Page: https://openairdocs.org/ntsb/FTW76FPJ18

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3685   75/12/9   FREDERICK,OK        BRANTLY B2B         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1437                    N2180U              PX-  0  0  0  DUAL                      AGE 23, 3464 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            131 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - FREDRICK MUNI
        DEPARTURE POINT             INTENDED DESTINATION
          FREDERICK,OK                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: POWER-ON LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
           PILOT IN COMMAND - MISJUDGED SPEED AND ALTITUDE
           DUAL STUDENT - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           DUAL STUDENT - CONTROL INTERFERENCE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - POORLY PLANNED APPROACH
        REMARKS- STUDENT LET ROTOR RPM GET TOO LOW,CAUSED R YAW. IP TOOK CTLS.
```

## Aircraft

- Registration: [N2180U](https://openairdocs.org/deregistered/N2180U-2017-07-14), registration cancelled 2017-07-14, S/N 342, built 1963 (OpenAirDocs)
- Reported make and model: BRANTLY B2B
- 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
- Airport: Fredrick Muni

## 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 19751209038459A](https://openairdocs.org/incident/19751209038459A), Dec 9, 1975: Hynes B2B, Frederick, OK, Substantial damage. Student let rotor RPM get too low,caused r yaw. Ip took ctls.

## Other investigations on N2180U (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 CEN09CA068](https://openairdocs.org/ntsb/CEN09CA068), Nov 20, 2008: Brantly B-2B (N2180U), Cedar Hill, TX, substantial damage. Probable cause: The pilot's improper decision to takeoff downwind. A contributing factor was the gusty conditions.
- [NTSB NYC72FGM03](https://openairdocs.org/ntsb/NYC72FGM03), Jul 10, 1971: Brantly B2B (N2180U), Williamsburg, PA, 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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