# NTSB NYC67F0041: Beech AT11, N4001A, Milford, DE, May 31, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 31, 1966
- Place: Milford, DE · MILFORD, DE
- Location: 38.9098° N, 75.4223° W: Placed by OpenAirDocs: center of Milford, DE, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.9098&lon=-75.4223&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 17, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 170786
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC67F0041
- Page: https://openairdocs.org/ntsb/NYC67F0041

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1601  66/5/31    MILFORD DEL         BEECH AT11          CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 36, 2300
        TIME - 1130                    N4001A              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 130 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - MILFORD AIRPARK
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR RETRACTED                                           TAKEOFF: RUN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADVERTENTLY RETRACTED GEAR
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - OTHER
          KIND OF CROP - MOSQUITO CONTROL                          TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    TANK/HOPPER-LOCATION - UNKNOWN/NOT REPORTED
          ELEVATION-AREA BEING TREATED-FEET -  50
```

## Aircraft

- Registration: [N4001A](https://openairdocs.org/aircraft/N4001A), registered now, S/N 43-10384, built 1956 (OpenAirDocs)
- Reported make and model: BEECH AT11
- Registry model: [Beech AT-11](https://openairdocs.org/model/beech-at-11) (registry code 1150202) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Milford Airpark

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.