A da 40 lost its passenger door in flight.

Attributes
ACN	787701
Time
Date	200805
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : zzz.tower
Operator	general aviation : instructional
Make Model Name	DA40 Diamond Star
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : instrument pilot : commercial pilot : cfi pilot : multi engine pilot : private
Experience	flight time last 90 days : 150 flight time total : 490 flight time type : 250
ASRS Report	787701
Person 2
Affiliation	other
Function	instruction : trainee
Qualification	pilot : private
Experience	flight time last 90 days : 0 flight time total : 59 flight time type : 0
ASRS Report	787698
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Ambiguous

Narrative:

We took off runway xx. At about 300 ft AGL we received an annunciation on our pfd display that the door is open. I looked back and I saw that the only thing holding the door was the red clip. However; the latch was in the closed position. I called the tower and requested to land because we had an open door. So he cleared us for runway yy. On final I tried to close the door by pushing down on it. But; I guess that caused the clip to disconnect. I thought the door only released upward. When we landed; we realized the door had departed the aircraft.

Original NASA ASRS Text

Title: A DA 40 LOST ITS PASSENGER DOOR IN FLIGHT.

Narrative: WE TOOK OFF RWY XX. AT ABOUT 300 FT AGL WE RECEIVED AN ANNUNCIATION ON OUR PFD DISPLAY THAT THE DOOR IS OPEN. I LOOKED BACK AND I SAW THAT THE ONLY THING HOLDING THE DOOR WAS THE RED CLIP. HOWEVER; THE LATCH WAS IN THE CLOSED POS. I CALLED THE TWR AND REQUESTED TO LAND BECAUSE WE HAD AN OPEN DOOR. SO HE CLRED US FOR RWY YY. ON FINAL I TRIED TO CLOSE THE DOOR BY PUSHING DOWN ON IT. BUT; I GUESS THAT CAUSED THE CLIP TO DISCONNECT. I THOUGHT THE DOOR ONLY RELEASED UPWARD. WHEN WE LANDED; WE REALIZED THE DOOR HAD DEPARTED THE ACFT.

Data retrieved from NASA's ASRS site as of May 2009 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.