The passenger door popped open on a beech baron right after takeoff.

Attributes
ACN	266190
Time
Date	199403
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mky
State Reference	FL
Altitude	agl bound lower : 400 agl bound upper : 400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : rsw
Operator	general aviation : personal
Make Model Name	Beechcraft Twin Piston Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 25 flight time total : 10000 flight time type : 1200
ASRS Report	266190
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After gaining about 200-300 ft altitude the cabin door loosened and opened. Had already received a clearance from fort myers ATC for the takeoff and departure, which is remote arrangement. The min this occurred, we called for myers, canceled the IFR departure and continued VFR. We made a right hand pattern to marco island, landed and assessed the door problem. The door was re-closed and it was locked satisfactorily to return to the procedure and takeoff for the instrument flight plan. The instrument flight plan was then reactivated and carried out with no further problems or difficulties. The only concern here is that ATC may have had some bad attitude about the situation that we had to cancel the IFR and return to the airport to adjust the door on the airplane. There was no risk involved in this particular situation other than the inconvenience of the delayed flight.

Original NASA ASRS Text

Title: THE PAX DOOR POPPED OPEN ON A BEECH BARON RIGHT AFTER TKOF.

Narrative: AFTER GAINING ABOUT 200-300 FT ALT THE CABIN DOOR LOOSENED AND OPENED. HAD ALREADY RECEIVED A CLRNC FROM FORT MYERS ATC FOR THE TKOF AND DEP, WHICH IS REMOTE ARRANGEMENT. THE MIN THIS OCCURRED, WE CALLED FOR MYERS, CANCELED THE IFR DEP AND CONTINUED VFR. WE MADE A R HAND PATTERN TO MARCO ISLAND, LANDED AND ASSESSED THE DOOR PROB. THE DOOR WAS RE-CLOSED AND IT WAS LOCKED SATISFACTORILY TO RETURN TO THE PROC AND TKOF FOR THE INST FLT PLAN. THE INST FLT PLAN WAS THEN REACTIVATED AND CARRIED OUT WITH NO FURTHER PROBS OR DIFFICULTIES. THE ONLY CONCERN HERE IS THAT ATC MAY HAVE HAD SOME BAD ATTITUDE ABOUT THE SIT THAT WE HAD TO CANCEL THE IFR AND RETURN TO THE ARPT TO ADJUST THE DOOR ON THE AIRPLANE. THERE WAS NO RISK INVOLVED IN THIS PARTICULAR SIT OTHER THAN THE INCONVENIENCE OF THE DELAYED FLT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.