# NTSB FTW79FPG50: Na Rockwell S2R, N5647X, Marked Tree, AR, June 12, 1979

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 12, 1979
- Place: Marked Tree, AR · MARKED TREE, AR
- Location: 35.5281° N, 90.4266° W: Placed by OpenAirDocs: center of Marked Tree, AR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.5281&lon=-90.4266&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report July 5, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 136233
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW79FPG50
- Page: https://openairdocs.org/ntsb/FTW79FPG50

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1146  79/6/12    MARKED TREE,AR      NA ROCKWELL S2R     CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 40, 2000
        TIME - 1600                    N5647X              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 1000 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          MARKED TREE,AR              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           FIRE OR EXPLOSION: IN FLIGHT                             IN FLIGHT: SWATH RUN
        PROBABLE CAUSE(S)
           MISCELLANEOUS - UNDETERMINED
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - FIRE IN ENGINE
           MISCELLANEOUS ACTS,CONDITIONS - *ERROR-INVALID CODE*
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - FERTILIZING (DUST)
          KIND OF CROP - UNKNOWN/NOT REPORTED                      TYPE OF CHEMICAL USED - DRY CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - NOT AVAILABLE
          COCKPIT CRASHPAD - INSTALLED                             CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  216                 SWATH RUN-HOW FLOWN - WIND CALM
         FIRE AFTER IMPACT
```

## Aircraft

- Registration: [N5647X](https://openairdocs.org/deregistered/N5647X-2013-06-13), registration cancelled 2013-06-13, S/N 1847R, built 1973 (OpenAirDocs)
- Reported make and model: NA ROCKWELL S2R
- Registry model: [Aero Commander S2R](https://openairdocs.org/model/aero-commander-s2r) (registry code 0143022) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (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 19790612011389A](https://openairdocs.org/incident/19790612011389A), Jun 12, 1979: Ayres S2R, Marked Tree, AR, Substantial damage. Pilot made a forced landing due to inflight engine fire. No reason could be found for fire.

## Other investigations on N5647X (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 FTW99LA097](https://openairdocs.org/ntsb/FTW99LA097), Mar 19, 1999: Aero Commander S2R (N5647X), Hobart, OK, destroyed. Probable cause: The loss of engine power due to an undetermined reason. A factor was the ditch.

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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