F100 flight crew takeoff with warning horn sounding.

Attributes
ACN	577899
Time
Date	200303
Day	Sat
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : yyz.airport
State Reference	ON
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
ASRS Report	577899
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : less severe non adherence : company policies non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : tkof warning horn other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance Maintenance Human Performance Aircraft
Primary Problem	Flight Crew Human Performance

Narrative:

On the morning of mar/sat/03, crew tracking had changed our departure time a total of 3 times out of yyz to ord. Attempting to get the flight out safely and an on time departure, my captain and I reviewed the MEL for correct procedures and maintenance action. Everything seemed to comply with the write-up and placard for the lift dumper unsafe message. During the takeoff warning test, the warning sounded, and we both assumed this was normal due to the placarded item. Obviously, the procedure was not completely complied with, and we took off with the takeoff warning system sounding and lift dumper unsafe message. After reviewing our action and the aircraft MEL in-flight, we determined maintenance should have placarded MEL ZZZ instead of YYY. Air carrier's maintenance also said when we landed, yyz maintenance should also have disconnected a couple of cannon plugs. I now know that we should not have received the takeoff warning sound during the test, and definitely, we should not have taken off with the horn sounding. I learned a valuable lesson, and this will not happen again.

Original NASA ASRS Text

Title: F100 FLT CREW TKOF WITH WARNING HORN SOUNDING.

Narrative: ON THE MORNING OF MAR/SAT/03, CREW TRACKING HAD CHANGED OUR DEP TIME A TOTAL OF 3 TIMES OUT OF YYZ TO ORD. ATTEMPTING TO GET THE FLT OUT SAFELY AND AN ON TIME DEP, MY CAPT AND I REVIEWED THE MEL FOR CORRECT PROCS AND MAINT ACTION. EVERYTHING SEEMED TO COMPLY WITH THE WRITE-UP AND PLACARD FOR THE LIFT DUMPER UNSAFE MESSAGE. DURING THE TKOF WARNING TEST, THE WARNING SOUNDED, AND WE BOTH ASSUMED THIS WAS NORMAL DUE TO THE PLACARDED ITEM. OBVIOUSLY, THE PROC WAS NOT COMPLETELY COMPLIED WITH, AND WE TOOK OFF WITH THE TKOF WARNING SYS SOUNDING AND LIFT DUMPER UNSAFE MESSAGE. AFTER REVIEWING OUR ACTION AND THE ACFT MEL INFLT, WE DETERMINED MAINT SHOULD HAVE PLACARDED MEL ZZZ INSTEAD OF YYY. ACR'S MAINT ALSO SAID WHEN WE LANDED, YYZ MAINT SHOULD ALSO HAVE DISCONNECTED A COUPLE OF CANNON PLUGS. I NOW KNOW THAT WE SHOULD NOT HAVE RECEIVED THE TKOF WARNING SOUND DURING THE TEST, AND DEFINITELY, WE SHOULD NOT HAVE TAKEN OFF WITH THE HORN SOUNDING. I LEARNED A VALUABLE LESSON, AND THIS WILL NOT HAPPEN AGAIN.

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.