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Air carrier X TCASII RA from air carrier Y climbing to lower altitude. Crossing traffic. TCASII logic.
| Attributes | |
| ACN | 267816 |
| Time | |
| Date | 199404 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : mwa |
| State Reference | IL |
| Altitude | msl bound lower : 27000 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 12 |
| ASRS Report | 267816 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | vertical : 1000 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Air carrier X level at FL280. Air carrier Y climbing to FL270. Both aircraft TCASII equipped. X wbound and Y sebound. Traffic called to both aircraft. X called and said he was responding to an RA, at that time he was already in a climb with mode C at 285. When he was clear he advised he was descending to FL280. I think that TCASII should not be used for RA in the positive control area, it should be used for advisory mode only. There's nothing worse than being busy at a sector when conflict alert activated after an aircraft responds to an RA. It not only almost makes your heart stop, but destroys all your concentration that you have before the event.
Original NASA ASRS Text
Title: ACR X TCASII RA FROM ACR Y CLBING TO LOWER ALT. XING TFC. TCASII LOGIC.
Narrative: ACR X LEVEL AT FL280. ACR Y CLBING TO FL270. BOTH ACFT TCASII EQUIPPED. X WBOUND AND Y SEBOUND. TFC CALLED TO BOTH ACFT. X CALLED AND SAID HE WAS RESPONDING TO AN RA, AT THAT TIME HE WAS ALREADY IN A CLB WITH MODE C AT 285. WHEN HE WAS CLR HE ADVISED HE WAS DSNDING TO FL280. I THINK THAT TCASII SHOULD NOT BE USED FOR RA IN THE PCA, IT SHOULD BE USED FOR ADVISORY MODE ONLY. THERE'S NOTHING WORSE THAN BEING BUSY AT A SECTOR WHEN CONFLICT ALERT ACTIVATED AFTER AN ACFT RESPONDS TO AN RA. IT NOT ONLY ALMOST MAKES YOUR HEART STOP, BUT DESTROYS ALL YOUR CONCENTRATION THAT YOU HAVE BEFORE THE EVENT.
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.