# NTSB MIA70F0075: Piper PA-11, N4971M, Gunnison, MS, July 17, 1969

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 17, 1969
- Place: Gunnison, MS · GUNNISON, MS
- Location: 33.9431° N, 90.9466° W: Placed by OpenAirDocs: center of Gunnison, MS, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.9431&lon=-90.9466&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 25, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 168311
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA70F0075
- Page: https://openairdocs.org/ntsb/MIA70F0075

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2122  69/7/17    GUNNISON,MISS       PIPER PA-11         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 26, 348
        TIME - 1015                    N4971M              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 52 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - ROSEDALE
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: PROCEDURE TURNAROUND
           COLLIDED WITH: DIRT BANK                                 LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           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 - UNKNOWN/NOT REPORTED       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - COTTON                                    TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE-NOT USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - BELLY                             TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  150                 SWATH RUN-HOW FLOWN - WIND CALM
          PROCEDURE TURNAROUND - SECOND 1/3 TURN
        REMARKS- HEAVY CARBON DEPOSITS FOUND ON NR 1 CYL EXHAUST VALVE.
```

## Aircraft

- Registration: [N4971M](https://openairdocs.org/deregistered/N4971M-1970-10-07), registration cancelled 1970-10-07, S/N 11-458 (OpenAirDocs)
- Reported make and model: PIPER PA-11
- Registry model: [Piper PA-11](https://openairdocs.org/model/piper-pa-11) (registry code 7101102) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Rosedale

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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