A B737-300 crew, on takeoff, experienced the cockpit door coming open.

Attributes
ACN	566497
Time
Date	200211
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : den.airport
State Reference	CO
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	566497
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other flight crewb other other : fa3
Resolutory Action	other
Consequence	other
Supplementary
Problem Areas	FAA Flight Crew Human Performance Cabin Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Began takeoff roll at approximately XA55. At approximately 100 KIAS, cockpit door opened. The door was closed by the first flight attendant approximately 2 mins later after airborne. There were no security incidents or known adverse passenger reactions to incident. Possible contributing factors: 1) crew became distraction just prior to pushback due to a passenger deplaning issue and possible impact on an on-time departure. 2) prior to descent, crew had flown 5 successive legs over 2 days on aircraft with the new fortress door and no security bar. 3) crew duty day had begun in mfr with incident at den occurring approximately 9 hours later. Fatigue may have been an issue. Bottom line: the fact that we had an unmodified door with a security bar flew under our radar screen den. CRM factors may have been distraction, crew fatigue and the fact that previous legs on this identify were flown exclusively with the new door and no security bar. Both captain and first officer agreed that with 2 different door system now on the company B737 fleet, that we both needed to develop a habit pattern during predep that included a visual check of the cockpit door prior to pushback.

Original NASA ASRS Text

Title: A B737-300 CREW, ON TKOF, EXPERIENCED THE COCKPIT DOOR COMING OPEN.

Narrative: BEGAN TKOF ROLL AT APPROX XA55. AT APPROX 100 KIAS, COCKPIT DOOR OPENED. THE DOOR WAS CLOSED BY THE FIRST FLT ATTENDANT APPROX 2 MINS LATER AFTER AIRBORNE. THERE WERE NO SECURITY INCIDENTS OR KNOWN ADVERSE PAX REACTIONS TO INCIDENT. POSSIBLE CONTRIBUTING FACTORS: 1) CREW BECAME DISTR JUST PRIOR TO PUSHBACK DUE TO A PAX DEPLANING ISSUE AND POSSIBLE IMPACT ON AN ON-TIME DEP. 2) PRIOR TO DSCNT, CREW HAD FLOWN 5 SUCCESSIVE LEGS OVER 2 DAYS ON ACFT WITH THE NEW FORTRESS DOOR AND NO SECURITY BAR. 3) CREW DUTY DAY HAD BEGUN IN MFR WITH INCIDENT AT DEN OCCURRING APPROX 9 HRS LATER. FATIGUE MAY HAVE BEEN AN ISSUE. BOTTOM LINE: THE FACT THAT WE HAD AN UNMODIFIED DOOR WITH A SECURITY BAR FLEW UNDER OUR RADAR SCREEN DEN. CRM FACTORS MAY HAVE BEEN DISTR, CREW FATIGUE AND THE FACT THAT PREVIOUS LEGS ON THIS IDENT WERE FLOWN EXCLUSIVELY WITH THE NEW DOOR AND NO SECURITY BAR. BOTH CAPT AND FO AGREED THAT WITH 2 DIFFERENT DOOR SYS NOW ON THE COMPANY B737 FLEET, THAT WE BOTH NEEDED TO DEVELOP A HABIT PATTERN DURING PREDEP THAT INCLUDED A VISUAL CHK OF THE COCKPIT DOOR PRIOR TO PUSHBACK.

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.