# NTSB DEN77DQG09: Aero Comdr 600S2R, N4956X, Clovis, NM, September 2, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 2, 1977
- Place: Clovis, NM · CLOVIS, NM
- Location: 34.4386° N, 103.1942° W: Placed by OpenAirDocs: center of Clovis, NM, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.4386&lon=-103.1942&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 27, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 144551
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN77DQG09
- Page: https://openairdocs.org/ntsb/DEN77DQG09

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3530   77/9/2  NR.CLOVIS,NM          AERO COMDR 600S2R   CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 28, 5000
        TIME - 1100                    N4956X              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, ALL IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         CLOVIS,NM                    LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: STARTING SWATH RUN
           COLLISION WITH GROUND/WATER: CONTROLLED                  LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - ATTEMPTED OPERATION W/KNOWN DEFICIENCIES IN EQUIPMENT
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - LOW COMPRESSION
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE INSPECTION OF AIRCRAFT (OWNER-PILOT)
           TERRAIN - ROUGH/UNEVEN
        FACTOR(S)
           POWERPLANT - IGNITION SYSTEM: SPARK PLUG
           MISCELLANEOUS ACTS,CONDITIONS - CARBON DEPOSITS
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 5000                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - POTATOES                                  TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - INSTALLED                             CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -ROLLING
          ELEVATION-AREA BEING TREATED-FEET -  4000                SWATH RUN-HOW FLOWN - CROSSWIND
```

## Aircraft

- Registration: [N4956X](https://openairdocs.org/aircraft/N4956X), registered now, S/N 2164R (OpenAirDocs)
- Reported make and model: AERO COMDR 600S2R
- Registry model: [Rockwell International S-2R](https://openairdocs.org/model/rockwell-international-s-2r) (registry code 7630202) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## 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 19770902030459A](https://openairdocs.org/incident/19770902030459A), Sep 2, 1977: Ayres S2R, Clovis, NM, Substantial damage

## Other investigations on N4956X (1)

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 CEN21FA368](https://openairdocs.org/ntsb/CEN21FA368), Aug 10, 2021: Rockwell International S2R (N4956X), Strasburg, ND, substantial damage, 1 fatal. Probable cause: The pilot’s intentional flight under power lines and his failure to maintain clearance from the lines during an aerial application flight.

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.