On takeoff roll emergency exit hatch separated from aircraft. Takeoff aborted.

Attributes
ACN	138911
Time
Date	199003
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : fnt
State Reference	MI
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Light Transport, High Wing, 2 Turboprop Eng
Flight Phase	climbout : takeoff other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp pilot : cfi
Experience	flight time last 90 days : 240 flight time total : 3400 flight time type : 1800
ASRS Report	138911
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : rejected takeoff
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

Our flight originated in flint, mi on 03/thu/90. The first officer and I had completed all the required cockpit checklists and the first flight of day engine checks. After being cleared for takeoff by the tower, we were accelerating down the runway when at approximately 90-90 KTS, the emergency exit hatch (located above the first officer in the cockpit) came off the aircraft. We aborted the takeoff and after telling the tower and our company of the problem, we taxied the aircraft back to the gate (all engine and other indications were normal). Earlier, during the originating checks and again in the pre-taxi checks, the hatch was found to be secure with the handle in the proper position.

Original NASA ASRS Text

Title: ON TKOF ROLL EMERGENCY EXIT HATCH SEPARATED FROM ACFT. TKOF ABORTED.

Narrative: OUR FLT ORIGINATED IN FLINT, MI ON 03/THU/90. THE F/O AND I HAD COMPLETED ALL THE REQUIRED COCKPIT CHECKLISTS AND THE FIRST FLT OF DAY ENGINE CHECKS. AFTER BEING CLRED FOR TKOF BY THE TWR, WE WERE ACCELERATING DOWN THE RWY WHEN AT APPROX 90-90 KTS, THE EMER EXIT HATCH (LOCATED ABOVE THE F/O IN THE COCKPIT) CAME OFF THE ACFT. WE ABORTED THE TKOF AND AFTER TELLING THE TWR AND OUR COMPANY OF THE PROBLEM, WE TAXIED THE ACFT BACK TO THE GATE (ALL ENGINE AND OTHER INDICATIONS WERE NORMAL). EARLIER, DURING THE ORIGINATING CHECKS AND AGAIN IN THE PRE-TAXI CHECKS, THE HATCH WAS FOUND TO BE SECURE WITH THE HANDLE IN THE PROPER POSITION.

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.