A cirrus SR20-gts aircraft experienced a full left aileron and full right rudder deflection lock-up ...

Attributes
ACN	733735
Time
Date	200704
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Weather Elements	other
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	SR20
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 1000 flight time type : 500
ASRS Report	733735
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance other anomaly
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : rejected takeoff
Consequence	faa : investigated other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

A thorough preflight was conducted with no faults found on the aircraft. VMC conditions prevailed at the time of the failure. Crosswind conditions prevailed during the time of departure and proper wind correction was used during the taxi to runway 35. During the before takeoff procedure no abnormalities were found during the flight control test. The aircraft was taxiing into position over the numbers when crosswind correction was initialized via the flight controls. Upon full deflection the pilot and instructor heard 2 independent clicks. The flight discontinued. The instructor taxied the aircraft off the runway 35 using the brakes. After discussion with other familiar cirrus aircraft pilots it was concluded that the rudder/aileron interconnect system may have failed and caused the fixed state of the flight controls. Callback conversation with reporter revealed the following information: reporter stated ailerons did lock-up in full left position and the rudder locked in full right deflection. Unable to unlock flight controls from either pilot or instructor's side control stick. Nose steering was impacted. Brakes had to be used to taxi off runway. Reporter was informed later by maintenance; the rudder-aileron interconnect bungee had bunched up cables and could only be unlocked by physically separating the control cables through an access panel in the fuselage. Maintenance added the aileron-rudder interconnect bungee was a mfg problem.

Original NASA ASRS Text

Title: A CIRRUS SR20-GTS ACFT EXPERIENCED A FULL LEFT AILERON AND FULL RIGHT RUDDER DEFLECTION LOCK-UP DURING TAXI OUT. CREW UNABLE TO UNLOCK FLT CONTROLS.

Narrative: A THOROUGH PREFLT WAS CONDUCTED WITH NO FAULTS FOUND ON THE ACFT. VMC CONDITIONS PREVAILED AT THE TIME OF THE FAILURE. XWIND CONDITIONS PREVAILED DURING THE TIME OF DEP AND PROPER WIND CORRECTION WAS USED DURING THE TAXI TO RWY 35. DURING THE BEFORE TKOF PROC NO ABNORMALITIES WERE FOUND DURING THE FLT CTL TEST. THE ACFT WAS TAXIING INTO POS OVER THE NUMBERS WHEN XWIND CORRECTION WAS INITIALIZED VIA THE FLT CTLS. UPON FULL DEFLECTION THE PLT AND INSTRUCTOR HEARD 2 INDEPENDENT CLICKS. THE FLT DISCONTINUED. THE INSTRUCTOR TAXIED THE ACFT OFF THE RWY 35 USING THE BRAKES. AFTER DISCUSSION WITH OTHER FAMILIAR CIRRUS ACFT PLTS IT WAS CONCLUDED THAT THE RUDDER/AILERON INTERCONNECT SYS MAY HAVE FAILED AND CAUSED THE FIXED STATE OF THE FLT CTLS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED AILERONS DID LOCK-UP IN FULL LEFT POSITION AND THE RUDDER LOCKED IN FULL RIGHT DEFLECTION. UNABLE TO UNLOCK FLT CONTROLS FROM EITHER PILOT OR INSTRUCTOR'S SIDE CONTROL STICK. NOSE STEERING WAS IMPACTED. BRAKES HAD TO BE USED TO TAXI OFF RUNWAY. REPORTER WAS INFORMED LATER BY MAINTENANCE; THE RUDDER-AILERON INTERCONNECT BUNGEE HAD BUNCHED UP CABLES AND COULD ONLY BE UNLOCKED BY PHYSICALLY SEPARATING THE CONTROL CABLES THROUGH AN ACCESS PANEL IN THE FUSELAGE. MAINTENANCE ADDED THE AILERON-RUDDER INTERCONNECT BUNGEE WAS A MFG PROBLEM.

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.

A cirrus SR20-gts aircraft experienced a full left aileron and full right rudder deflection lock-up during taxi out. Crew unable to unlock flight controls.