NTSB Identification: MIA88LA133.
The docket is stored on NTSB microfiche number 36011.
Accident occurred Wednesday, March 30, 1988 in ST PETERSBURG, FL
Probable Cause Approval Date: 02/28/1989
Aircraft: PIPER PA-60-601P, registration: N3645E
Injuries: 2 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE ACFT WAS CLIMBING THRU 1600 FT WHEN THE UPPER HALF OF THE MAIN ENTRY DOOR OPENED & SEPARATED FROM THE ACFT. THE PHYSICIAN PLT STATED THAT HE WAS REASONABLY SURE THAT HE HAD SECURED THE DOOR PRIOR TO DEPARTURE. HE STATED THAT ALTHOUGH THE CABIN HAD NOT YET PRESSURIZED, THE DOOR SEAL HAD INFLATED & THE CABIN WAS SET TO PRESSURIZE AT 2000 FT. THE DOOR WAS RECOVERED FROM A MOBILE HOME PARK WHERE IT HAD STRUCK A MOBILE HOME. AN EXAM OF THE DOOR REVEALED THE FOUR LOCKING PINS WERE EXTENDED OR IN THE LOCKED POSITION. NO DETERMINATION COULD BE MADE AS TO THE REASON FOR THE UNWARRANTED DOOR OPENING. SINCE 1980, THE AEROSTAR HAD BEEN INVOLVED IN FOUR ACCIDENTS & EIGHT INCIDENTS IN WHICH THE MAIN CABIN ENTRY DOOR OPENED IN FLT. ONE OF THE ACCIDENTS RESULTED IN A FATALITY. ON 4-12-88, THE NTSB RECOMMENDED TO FAA THAT AN AD NOTE BE ISSUED IN A EFFORT TO CORRECT THE PROBLEM.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

DOOR..FAILURE,PARTIAL


Contributing Factors

DOOR..UNLOCKED

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