|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||atc facility : tul|
|Controlling Facilities||tower : tul|
artcc : mmmx
|Make Model Name||Light Transport, Low Wing, 2 Turbojet Eng|
|Flight Phase||landing : go around|
|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
|Function||flight crew : first officer|
|Qualification||pilot : instrument|
pilot : commercial
|Anomaly||aircraft equipment problem : critical|
|Independent Detector||other flight crewa|
|Resolutory Action||flight crew : regained aircraft control|
|Air Traffic Incident||other|
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.