Go around due to roll action on approach.

Attributes
ACN	98387
Time
Date	198811
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : tul
State Reference	OK
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : tul artcc : mmmx
Operator	other
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	landing : go around landing other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 110 flight time total : 8500 flight time type : 750
ASRS Report	98387
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control other other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

While on final approach to runway 35L, at approximately 200' AGL, the airplane rolled to the left. I rolled back right to wings level and simultaneously executed an immediate go around. On climb out, I noticed the 'aug-ail' (augmentation aileron) warning light had illuminated on the annunciator panel. On the crosswind leg, we attempted to reset the system with spoiler on reset switch. This would have returned the system to normal operation. Being unable to reset, we pulled the spoileron circuit breaker, thus disabling the spoileron system. The next landing was completed west/O any further problems. After the landing we turned the airplane over to our maintenance. A spoileron before taxi check was conducted as per the flight and maintenance manuals. The system ground-checked satisfactorily, but on further investigation a spoiler followup and the computer amplifier did not check out electronically. These parts were replaced and the system recalibrated and functionally tested. The flight manual and the pilot training manual does not seem to provide needed information on the following areas: satisfactory completion of the before taxi check did not guarantee electrical integrity of the system. Procedures to compensate for the loss of roll control authority due to disabling the system.

Original NASA ASRS Text

Title: GO AROUND DUE TO ROLL ACTION ON APCH.

Narrative: WHILE ON FINAL APCH TO RWY 35L, AT APPROX 200' AGL, THE AIRPLANE ROLLED TO THE LEFT. I ROLLED BACK RIGHT TO WINGS LEVEL AND SIMULTANEOUSLY EXECUTED AN IMMEDIATE GO AROUND. ON CLBOUT, I NOTICED THE 'AUG-AIL' (AUGMENTATION AILERON) WARNING LIGHT HAD ILLUMINATED ON THE ANNUNCIATOR PANEL. ON THE XWIND LEG, WE ATTEMPTED TO RESET THE SYS WITH SPOILER ON RESET SWITCH. THIS WOULD HAVE RETURNED THE SYS TO NORMAL OPERATION. BEING UNABLE TO RESET, WE PULLED THE SPOILERON CB, THUS DISABLING THE SPOILERON SYS. THE NEXT LNDG WAS COMPLETED W/O ANY FURTHER PROBS. AFTER THE LNDG WE TURNED THE AIRPLANE OVER TO OUR MAINT. A SPOILERON BEFORE TAXI CHK WAS CONDUCTED AS PER THE FLT AND MAINT MANUALS. THE SYS GND-CHKED SATISFACTORILY, BUT ON FURTHER INVESTIGATION A SPOILER FOLLOWUP AND THE COMPUTER AMPLIFIER DID NOT CHK OUT ELECTRONICALLY. THESE PARTS WERE REPLACED AND THE SYS RECALIBRATED AND FUNCTIONALLY TESTED. THE FLT MANUAL AND THE PLT TRNING MANUAL DOES NOT SEEM TO PROVIDE NEEDED INFO ON THE FOLLOWING AREAS: SATISFACTORY COMPLETION OF THE BEFORE TAXI CHK DID NOT GUARANTEE ELECTRICAL INTEGRITY OF THE SYS. PROCS TO COMPENSATE FOR THE LOSS OF ROLL CONTROL AUTHORITY DUE TO DISABLING THE SYS.

Data retrieved from NASA's ASRS site as of August 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.