B757-200 nosewheel steering fails on entry to runway.

Attributes
ACN	700166
Time
Date	200606
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mci.airport
State Reference	MO
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi ground : position and hold
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 220 flight time total : 13100 flight time type : 6000
ASRS Report	700166
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

During taxi; on runway; turning to line up for takeoff. Nosewheel steering tiller froze (locked up) while trying to execute 90 degree turn for line-up to takeoff. To avoid exiting runway into grass utilized left brake and right engine thrust to return to center of runway. Nosewheel final position 90 degrees left and frozen. Unable to exit runway or move aircraft. Advised ATC and company. Required tug to remove aircraft from runway. Aircraft towed back to gate and part replaced by maintenance.

Original NASA ASRS Text

Title: B757-200 NOSEWHEEL STEERING FAILS ON ENTRY TO RWY.

Narrative: DURING TAXI; ON RWY; TURNING TO LINE UP FOR TKOF. NOSEWHEEL STEERING TILLER FROZE (LOCKED UP) WHILE TRYING TO EXECUTE 90 DEG TURN FOR LINE-UP TO TKOF. TO AVOID EXITING RWY INTO GRASS UTILIZED L BRAKE AND R ENG THRUST TO RETURN TO CTR OF RWY. NOSEWHEEL FINAL POS 90 DEGS L AND FROZEN. UNABLE TO EXIT RWY OR MOVE ACFT. ADVISED ATC AND COMPANY. REQUIRED TUG TO REMOVE ACFT FROM RWY. ACFT TOWED BACK TO GATE AND PART REPLACED BY MAINT.

Data retrieved from NASA's ASRS site as of January 2009 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.