Government aircraft has nosewheel vibration after rotation.

Attributes
ACN	311539
Time
Date	199507
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : rdu
State Reference	NC
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	other
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff landing other
Flight Plan	IFR
Person 1
Affiliation	government other
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : cfi pilot : atp
Experience	flight time last 90 days : 120 flight time total : 6000 flight time type : 2000
ASRS Report	311539
Person 2
Affiliation	government other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

After rotation during takeoff from btv, felt vibration which felt like a blown nose tire. Had emergency vehicles standing by at rdu during landing. Actual cause of vibration was a weighted patch inside nose tire which came loose, causing imbal.

Original NASA ASRS Text

Title: GOV ACFT HAS NOSEWHEEL VIBRATION AFTER ROTATION.

Narrative: AFTER ROTATION DURING TKOF FROM BTV, FELT VIBRATION WHICH FELT LIKE A BLOWN NOSE TIRE. HAD EMER VEHICLES STANDING BY AT RDU DURING LNDG. ACTUAL CAUSE OF VIBRATION WAS A WEIGHTED PATCH INSIDE NOSE TIRE WHICH CAME LOOSE, CAUSING IMBAL.

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.