<< >> NASA ASRS Report 628273, August 2004

An EMB135 captain reports slight vibration in control yoke. Not visible, but could be felt. Disappeared below 270 KTS. All system performed normal.

Attributes
ACN	628273
Time
Date	200408
Day	Sun
Place
Locale Reference	airport : zzz.airport
State Reference	US
Environment
Weather Elements	Turbulence
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Embraer Jet Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	628273
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : unable
Consequence	other other
Supplementary
Problem Areas	Weather Aircraft
Primary Problem	Aircraft

Narrative:

En route from ZZZ1 to ZZZ2, a slight vibration was apparent in the control yoke. It was not visible, but could be felt. Below 270 KTS it disappeared. The flight conditions were continuous light turbulence with occasional moderate turbulence. All system operated and performed normal. Nothing was noted on postflt. Hydraulic system #1 was operating at 2800 psi -- well within normal range. Maintenance was notified on arrival to ZZZ2.

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Original NASA ASRS Text

Title: AN EMB135 CAPT RPTS SLIGHT VIBRATION IN CTL YOKE. NOT VISIBLE, BUT COULD BE FELT. DISAPPEARED BELOW 270 KTS. ALL SYS PERFORMED NORMAL.

Narrative: ENRTE FROM ZZZ1 TO ZZZ2, A SLIGHT VIBRATION WAS APPARENT IN THE CTL YOKE. IT WAS NOT VISIBLE, BUT COULD BE FELT. BELOW 270 KTS IT DISAPPEARED. THE FLT CONDITIONS WERE CONTINUOUS LIGHT TURB WITH OCCASIONAL MODERATE TURB. ALL SYS OPERATED AND PERFORMED NORMAL. NOTHING WAS NOTED ON POSTFLT. HYD SYS #1 WAS OPERATING AT 2800 PSI -- WELL WITHIN NORMAL RANGE. MAINT WAS NOTIFIED ON ARR TO ZZZ2.

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.