Left nosewheel of a F100 came off during takeoff at ord. Flight crew was unaware of incident until a...

Attributes
ACN	375609
Time
Date	199707
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : takeoff ground : preflight ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
ASRS Report	375609
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	375610
Events
Anomaly	aircraft equipment problem : critical non adherence other other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Upon preflight inspection we had 2 secure nose gear tires. Upon shutdown in pvd a mechanic informed us that we only had 1 nose gear tire. Postflt inspection confirmed that. The left tire separated either during takeoff or during flight. The right nose gear tire appeared to have some sort of wired nuts that seemed stripped. I took some pictures if you want to see them. We as a crew had no knowledge that the left nose gear tire had separated. There was no unusual noise or operational difficulty that would have alerted us that something was wrong. After the flight the #1 flight attendant said that she heard a quick, unusual, noise but nothing to inform the crew about. We landed on runway 23 at pvd. Callback conversation with reporter revealed the following information: reporter said that the left nosewheel came off because on an outer bearing failure. The air carrier came out later with a maintenance bulletin that advised ground crews to be sure to use the correct torque on the nosewheel nuts or lugs. They referenced the use of 'inches' versus 'foot pounds' of pressure during the tightening procedures. Appears that the bearing was too tight and had thus failed. The right wheel fasteners were normal, both in appearance and in mechanical aspects. Reporter didn't know if fokker was advised of this event. There have been no other incidents of this nature that the reporter could address.

Original NASA ASRS Text

Title: L NOSEWHEEL OF A F100 CAME OFF DURING TKOF AT ORD. FLC WAS UNAWARE OF INCIDENT UNTIL AFTER POSTFLT INSPECTION WHEN PARKED AT THE RAMP AT PVD.

Narrative: UPON PREFLT INSPECTION WE HAD 2 SECURE NOSE GEAR TIRES. UPON SHUTDOWN IN PVD A MECH INFORMED US THAT WE ONLY HAD 1 NOSE GEAR TIRE. POSTFLT INSPECTION CONFIRMED THAT. THE L TIRE SEPARATED EITHER DURING TKOF OR DURING FLT. THE R NOSE GEAR TIRE APPEARED TO HAVE SOME SORT OF WIRED NUTS THAT SEEMED STRIPPED. I TOOK SOME PICTURES IF YOU WANT TO SEE THEM. WE AS A CREW HAD NO KNOWLEDGE THAT THE L NOSE GEAR TIRE HAD SEPARATED. THERE WAS NO UNUSUAL NOISE OR OPERATIONAL DIFFICULTY THAT WOULD HAVE ALERTED US THAT SOMETHING WAS WRONG. AFTER THE FLT THE #1 FLT ATTENDANT SAID THAT SHE HEARD A QUICK, UNUSUAL, NOISE BUT NOTHING TO INFORM THE CREW ABOUT. WE LANDED ON RWY 23 AT PVD. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR SAID THAT THE L NOSEWHEEL CAME OFF BECAUSE ON AN OUTER BEARING FAILURE. THE ACR CAME OUT LATER WITH A MAINT BULLETIN THAT ADVISED GND CREWS TO BE SURE TO USE THE CORRECT TORQUE ON THE NOSEWHEEL NUTS OR LUGS. THEY REFED THE USE OF 'INCHES' VERSUS 'FOOT POUNDS' OF PRESSURE DURING THE TIGHTENING PROCS. APPEARS THAT THE BEARING WAS TOO TIGHT AND HAD THUS FAILED. THE R WHEEL FASTENERS WERE NORMAL, BOTH IN APPEARANCE AND IN MECHANICAL ASPECTS. RPTR DIDN'T KNOW IF FOKKER WAS ADVISED OF THIS EVENT. THERE HAVE BEEN NO OTHER INCIDENTS OF THIS NATURE THAT THE RPTR COULD ADDRESS.

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.

Left nosewheel of a F100 came off during takeoff at ord. Flight crew was unaware of incident until after postflt inspection when parked at the ramp at pvd.