# NTSB FTW76AF110: Bolkow BO-105, N90656, Rockport, LA, July 25, 1976

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 25, 1976
- Place: Rockport, LA · ROCKPORT, LA
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 9, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 155141
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW76AF110
- Page: https://openairdocs.org/ntsb/FTW76AF110

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3294  76/7/25    ROCKPORT,LA         BOLKOW BO-105       CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 45, 6175
        TIME - 0905                    N90656              PX-  0  0  1  AIR TAXI-PASSG            TOTAL HOURS, 194 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - ARANSAS COUNTY
        DEPARTURE POINT             INTENDED DESTINATION
          FREEPORT,TX                 ROCKPORT,LA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: HOVERING
           HARD LANDING                                             LANDING: POWER-ON LANDING
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE INSPECTION OF AIRCRAFT (MAINTENANCE PERSONNEL)
           ROTORCRAFT - FLIGHT CONTROL SYSTEMS: TAIL ROTOR PITCH CONTROL SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY SECURED
           MISCELLANEOUS ACTS,CONDITIONS - MISSING
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- COTTER PIN SECURING NUT ON LOWER T/R BELLCRANK BOLT NOT INSTALLED AFTER REASSEMBLY.
```

## Aircraft

- Registration: [N90656](https://openairdocs.org/deregistered/N90656-1983-11-29), registration cancelled 1983-11-29, S/N S-107 (OpenAirDocs)
- Reported make and model: BOLKOW BO-105
- Registry model: [Messerschmitt-Boelkow-Blohm-Gm BO-105C](https://openairdocs.org/model/messerschmitt-boelkow-blohm-gm-bo-105c) (registry code 5626005) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: Substantial damage
- Airport: Aransas County

## 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 19760725036479A](https://openairdocs.org/incident/19760725036479A), Jul 25, 1976: Bolkms BO105C, Rockport, TX, Substantial damage. Cotter pin securing nut on lower t/r bellcrank bolt not installed after reassembly.

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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