An MD11 on climb at FL250 declared an emergency, dumped fuel and diverted due to main tires #7 and #...

Attributes
ACN	486659
Time
Date	200009
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	msl bound lower : 10000 msl bound upper : 25000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw.artcc tower : pdx.tower
Operator	common carrier : air carrier
Make Model Name	MD-11
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : vacating altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	486659
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : tire temp monitor other flight crewa
Resolutory Action	controller : issued new clearance flight crew : diverted to another airport flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

At about 10000 ft, I scanned the system displays and found the #7 and #8 tire had an amber outline around them. The tire pressure on #7 was 255 psi and #8 was 175 psi. The tire differential warning shortly thereafter was alerted and the tire pressure continued to decrease. Technician and dispatch was notified and all of us agreed that we should probably return to dfw for a landing rather than go on to gru. The tire fail alert then came on and procedures were followed to return to nearest suitable airport. We declared an emergency and dumped fuel and returned to dfw without incident.

Original NASA ASRS Text

Title: AN MD11 ON CLB AT FL250 DECLARED AN EMER, DUMPED FUEL AND DIVERTED DUE TO MAIN TIRES #7 AND #8 FAILING.

Narrative: AT ABOUT 10000 FT, I SCANNED THE SYS DISPLAYS AND FOUND THE #7 AND #8 TIRE HAD AN AMBER OUTLINE AROUND THEM. THE TIRE PRESSURE ON #7 WAS 255 PSI AND #8 WAS 175 PSI. THE TIRE DIFFERENTIAL WARNING SHORTLY THEREAFTER WAS ALERTED AND THE TIRE PRESSURE CONTINUED TO DECREASE. TECHNICIAN AND DISPATCH WAS NOTIFIED AND ALL OF US AGREED THAT WE SHOULD PROBABLY RETURN TO DFW FOR A LNDG RATHER THAN GO ON TO GRU. THE TIRE FAIL ALERT THEN CAME ON AND PROCS WERE FOLLOWED TO RETURN TO NEAREST SUITABLE ARPT. WE DECLARED AN EMER AND DUMPED FUEL AND RETURNED TO DFW WITHOUT INCIDENT.

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.

An MD11 on climb at FL250 declared an emergency, dumped fuel and diverted due to main tires #7 and #8 failing.