An air carrier mdt took off with its nose gear retraction disabled.

Attributes
ACN	246596
Time
Date	199307
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : fll
State Reference	FL
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	Medium Transport, High Wing, 2 Turboprop Eng
Flight Phase	ground : preflight ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 21000 flight time type : 6000
ASRS Report	246596
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 250 flight time total : 10000 flight time type : 250
ASRS Report	246589
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Aircraft was pushed back by a ground agent due to close proximity to another parked aircraft. Nose gear pin was pulled into the locked position as required. The pin was not pushed back in after pushback. There is no cockpit indication of the pin placement. A takeoff was accomplished and the gear retracted. The nose gear would not come up due to the pin still being out. A landing was made, pin pushed in and a normal takeoff accomplished. As captain of the flight, I should have made sure the pin was pushed in after pushback, but failed to do so. The agent was an experienced person whom I have known for many yrs and who had pushed us back many times. Supplemental information from acn 246589: it seems like the mdt should have a caution light for this nose gear pin but it does not and there are no plans I know of to put one in the mdt.

Original NASA ASRS Text

Title: AN ACR MDT TOOK OFF WITH ITS NOSE GEAR RETRACTION DISABLED.

Narrative: ACFT WAS PUSHED BACK BY A GND AGENT DUE TO CLOSE PROX TO ANOTHER PARKED ACFT. NOSE GEAR PIN WAS PULLED INTO THE LOCKED POS AS REQUIRED. THE PIN WAS NOT PUSHED BACK IN AFTER PUSHBACK. THERE IS NO COCKPIT INDICATION OF THE PIN PLACEMENT. A TKOF WAS ACCOMPLISHED AND THE GEAR RETRACTED. THE NOSE GEAR WOULD NOT COME UP DUE TO THE PIN STILL BEING OUT. A LNDG WAS MADE, PIN PUSHED IN AND A NORMAL TKOF ACCOMPLISHED. AS CAPT OF THE FLT, I SHOULD HAVE MADE SURE THE PIN WAS PUSHED IN AFTER PUSHBACK, BUT FAILED TO DO SO. THE AGENT WAS AN EXPERIENCED PERSON WHOM I HAVE KNOWN FOR MANY YRS AND WHO HAD PUSHED US BACK MANY TIMES. SUPPLEMENTAL INFO FROM ACN 246589: IT SEEMS LIKE THE MDT SHOULD HAVE A CAUTION LIGHT FOR THIS NOSE GEAR PIN BUT IT DOES NOT AND THERE ARE NO PLANS I KNOW OF TO PUT ONE IN THE MDT.

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.