A wheel assembly fell off of an air carrier medium large transport.

Attributes
ACN	262939
Time
Date	199401
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ama
State Reference	TX
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	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 5500 flight time type : 300
ASRS Report	262939
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

On takeoff from ama, another airline crew reported that we had lost a main wheel during takeoff. Takeoff and gear retraction seemed normal. Ama operations found and confirmed it was a main wheel and tire assembly. Continued to dfw and declared emergency. Told ATC we planned to land and stop on runway and have fire department check landing gear for any sign of fire and then be towed to gate. Briefed flight attendants and they went through appropriate checklists. Landing was uneventful. Fire department confirmed that #4 wheel and tire assembly were missing. No word yet on what failed to cause wheel to come off, but this would certainly point to defective hardware and/or maintenance procedure.

Original NASA ASRS Text

Title: A WHEEL ASSEMBLY FELL OFF OF AN ACR MLG.

Narrative: ON TKOF FROM AMA, ANOTHER AIRLINE CREW RPTED THAT WE HAD LOST A MAIN WHEEL DURING TKOF. TKOF AND GEAR RETRACTION SEEMED NORMAL. AMA OPS FOUND AND CONFIRMED IT WAS A MAIN WHEEL AND TIRE ASSEMBLY. CONTINUED TO DFW AND DECLARED EMER. TOLD ATC WE PLANNED TO LAND AND STOP ON RWY AND HAVE FIRE DEPT CHK LNDG GEAR FOR ANY SIGN OF FIRE AND THEN BE TOWED TO GATE. BRIEFED FLT ATTENDANTS AND THEY WENT THROUGH APPROPRIATE CHKLISTS. LNDG WAS UNEVENTFUL. FIRE DEPT CONFIRMED THAT #4 WHEEL AND TIRE ASSEMBLY WERE MISSING. NO WORD YET ON WHAT FAILED TO CAUSE WHEEL TO COME OFF, BUT THIS WOULD CERTAINLY POINT TO DEFECTIVE HARDWARE AND/OR MAINT PROC.

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.