# NTSB FTW78FA005: Beech M35, N9840R, Dubach, LA, October 23, 1977

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: October 23, 1977
- Place: Dubach, LA · DUBACH, LA
- Location: 32.7033° N, 92.6615° W: Placed by OpenAirDocs: center of Dubach, LA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=32.7033&lon=-92.6615&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report January 18, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 144177
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW78FA005
- Page: https://openairdocs.org/ntsb/FTW78FA005

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3864  77/10/23 NR.DUBACH,LA          BEECH M35           CR-  1  0  0  NONCOMMERCIAL             COMMERCIAL, AGE 66, 1146
        TIME - 1728                    N9840R              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 557 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          DOTHAN,AL                   DALLAS,TX
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - EXCEEDED DESIGNED STRESS LIMITS OF AIRCRAFT
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           WEATHER - TURBULENCE, ASSOCIATED W/CLOUDS AND/OR THUNDERSTORMS
        FACTOR(S)
           AIRFRAME - WINGS: SKIN AND ATTACHMENTS
           AIRFRAME - FLIGHT CONTROL SURFACES: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        WEATHER BRIEFING - BRIEFING RECEIVED-METHOD UNKNOWN
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          BROKEN                                                    2500
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          4 MILES OR LESS                                          RAIN SHOWERS
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      73
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          120                                                       10
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          IFR                                                      IFR
        REMARKS- WINGS SHOWED EVIDENCE OF POSITIVE OVERLOAD L WING SEPARATED DOWN L R STAB RUDVATR SEP POS OVERLOAD
```

## Aircraft

- Registration: [N9840R](https://openairdocs.org/deregistered/N9840R-1978-03-02), registration cancelled 1978-03-02, S/N D-6368, built 1960 (OpenAirDocs)
- Reported make and model: BEECH M35
- Registry model: [Beech M35](https://openairdocs.org/model/beech-m35) (registry code 1151526) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed

## 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 19771023041139A](https://openairdocs.org/incident/19771023041139A), Oct 23, 1977: Beech M35, Dubach, LA, Destroyed. Wings showed evidence of positive overload l wing separated down l r stab rudvatr sep pos overload

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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