<< >> NASA ASRS Report 699706, June 2006

An A310 captain reports a significant airframe shudder when the rudder pedals were moved during the preflight control check.

Attributes
ACN	699706
Time
Date	200606
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mem.airport
State Reference	TN
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	A310
Operating Under FAR Part	Part 135
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp pilot : multi engine
Experience	flight time last 90 days : 65 flight time total : 7500 flight time type : 1300
ASRS Report	699706
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	other
Consequence	other
Supplementary
Problem Areas	Aircraft Company
Primary Problem	Aircraft

Narrative:

During before takeoff flight control check; the rudder did not test properly. It had a very significant shudder starting in rear of aircraft; moving fwd in about 2 to 3 seconds that shook the whole aircraft. Rudder pedals were moved slowly and deliberately from both captain and first officer sides. Hydraulic pressures were above 2900 psi on all pumps. There was no apparent binding or obstructions in the flight controls.

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Original NASA ASRS Text

Title: AN A310 CAPT RPTS A SIGNIFICANT AIRFRAME SHUDDER WHEN THE RUDDER PEDALS WERE MOVED DURING THE PREFLT CTL CHK.

Narrative: DURING BEFORE TKOF FLT CTL CHK; THE RUDDER DID NOT TEST PROPERLY. IT HAD A VERY SIGNIFICANT SHUDDER STARTING IN REAR OF ACFT; MOVING FWD IN ABOUT 2 TO 3 SECONDS THAT SHOOK THE WHOLE ACFT. RUDDER PEDALS WERE MOVED SLOWLY AND DELIBERATELY FROM BOTH CAPT AND FO SIDES. HYD PRESSURES WERE ABOVE 2900 PSI ON ALL PUMPS. THERE WAS NO APPARENT BINDING OR OBSTRUCTIONS IN THE FLT CTLS.

Data retrieved from NASA's ASRS site as of January 2009 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.