NTSB Identification: FTW74FQG18
14 CFR Part 91 General Aviation
Aircraft: PIPER PA-25, registration: N4990Y

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 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
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3-4148  73/10/18 NR.POST,TEX           PIPER PA-25         CR-  1  0  0  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1430                    N4990Y              PX-  0  0  0  AERIAL APPLICATION        AGE 34, 7500 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            3000 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          SLATON,TEX                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: PULLUP FROM SWATH RUN
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           AIRFRAME - WINGS: SPARS
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - UNAPPROVED MODIFICATION
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - DEFOLIATION (LIQUID)
          KIND OF CROP - COTTON                                    TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - 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 -  2500                SWATH RUN-HOW FLOWN - CROSSWIND
         FIRE AFTER IMPACT
        REMARKS- FATIGUE CRACK INITIATD AT IMPROPRLY DRILLD RIVT HOLE.EVIDENCE OF OVRHEAT OF SPAR TO STRAIGHTEN.

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