MD80 crew had nose gear failure on takeoff roll. This resulted in ground shift failure also.

Attributes
ACN	551236
Time
Date	200206
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	agl bound lower : 0 msl bound upper : 5000
Aircraft 1
Controlling Facilities	tower : dfw.tower
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : initial climbout : takeoff ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	551236
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance controller : provided flight assist flight crew : landed in emergency condition flight crew : diverted to another airport flight crew : declared emergency none taken : detected after the fact other
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Nose gear failure. At approximately 2/3 of takeoff roll on runway 17R at dfw, felt sharp bump to nose gear like hitting a hole in runway or centerline light. Aircraft appeared fine, so continued takeoff. After raising gear, got unsafe red nose gear light indication with considerable air noise and vibration. Additionally, had following indications: 1) lost cabin pressurization. 2) autospoiler do not use annunciator. 3) autothrottles inoperative. 4) stall indication annunciator. 5) no TCASII or transponder. 6) flaps aural warning. Climbed to MSA of 3500 ft MSL and then 5000 ft to troubleshoot. Dropping gear handle resulted in 3 green down and locked indications (nose gear pin was also up). Was not sure if had blown nose tire or exactly what the problem was -- suspected failure of the ground shift mechanism. Declared emergency and returned to dfw and made a successful overweight 132000 pound landing. Crash fire rescue equipment crew and mechanics met aircraft and after inspection put pins in landing gear and ok'ed taxi in to gate.

Original NASA ASRS Text

Title: MD80 CREW HAD NOSE GEAR FAILURE ON TKOF ROLL. THIS RESULTED IN GND SHIFT FAILURE ALSO.

Narrative: NOSE GEAR FAILURE. AT APPROX 2/3 OF TKOF ROLL ON RWY 17R AT DFW, FELT SHARP BUMP TO NOSE GEAR LIKE HITTING A HOLE IN RWY OR CTRLINE LIGHT. ACFT APPEARED FINE, SO CONTINUED TKOF. AFTER RAISING GEAR, GOT UNSAFE RED NOSE GEAR LIGHT INDICATION WITH CONSIDERABLE AIR NOISE AND VIBRATION. ADDITIONALLY, HAD FOLLOWING INDICATIONS: 1) LOST CABIN PRESSURIZATION. 2) AUTOSPOILER DO NOT USE ANNUNCIATOR. 3) AUTOTHROTTLES INOP. 4) STALL INDICATION ANNUNCIATOR. 5) NO TCASII OR XPONDER. 6) FLAPS AURAL WARNING. CLBED TO MSA OF 3500 FT MSL AND THEN 5000 FT TO TROUBLESHOOT. DROPPING GEAR HANDLE RESULTED IN 3 GREEN DOWN AND LOCKED INDICATIONS (NOSE GEAR PIN WAS ALSO UP). WAS NOT SURE IF HAD BLOWN NOSE TIRE OR EXACTLY WHAT THE PROB WAS -- SUSPECTED FAILURE OF THE GND SHIFT MECHANISM. DECLARED EMER AND RETURNED TO DFW AND MADE A SUCCESSFUL OVERWT 132000 LB LNDG. CFR CREW AND MECHS MET ACFT AND AFTER INSPECTION PUT PINS IN LNDG GEAR AND OK'ED TAXI IN TO GATE.

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.