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Flight crew of an medium large transport descended in response to a TCASII RA resulting in a near midair collision.
| Attributes | |
| ACN | 281741 |
| Time | |
| Date | 199408 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : sji |
| State Reference | AL |
| Altitude | msl bound lower : 27000 msl bound upper : 27000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : j2 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 14000 flight time type : 6000 |
| ASRS Report | 281741 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 12000 flight time type : 7000 |
| ASRS Report | 281327 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : nmac non adherence : clearance non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 1 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
We were IFR, night, in the clear. Given traffic 12 O'clock at FL280. We were at FL270. Called traffic in sight, after which we were cleared to FL290. During our climb TCASII gave a TA/RA to descend at 2500 FPM, we complied. We told ATC about our RA and asked them what altitude the traffic was at. Traffic admitted he was off his altitude. This is not the only time TCASII has saved the day. It's worth its weight in gold/lives saved! Supplemental information from acn 281327: I pushed over into descent as we matched the traffic displayed to the aircraft passing just off to our left side and above us. Due to visual confirmation of aircraft passing us I stopped descent at 26700 ft. Other aircraft showed only plus 500 ft as he went by, so he evidently went approximately 800 ft below his altitude very abruptly. The rest of the flight was uneventful.
Original NASA ASRS Text
Title: FLC OF AN MLG DSNDED IN RESPONSE TO A TCASII RA RESULTING IN A NMAC.
Narrative: WE WERE IFR, NIGHT, IN THE CLR. GIVEN TFC 12 O'CLOCK AT FL280. WE WERE AT FL270. CALLED TFC IN SIGHT, AFTER WHICH WE WERE CLRED TO FL290. DURING OUR CLB TCASII GAVE A TA/RA TO DSND AT 2500 FPM, WE COMPLIED. WE TOLD ATC ABOUT OUR RA AND ASKED THEM WHAT ALT THE TFC WAS AT. TFC ADMITTED HE WAS OFF HIS ALT. THIS IS NOT THE ONLY TIME TCASII HAS SAVED THE DAY. IT'S WORTH ITS WT IN GOLD/LIVES SAVED! SUPPLEMENTAL INFO FROM ACN 281327: I PUSHED OVER INTO DSCNT AS WE MATCHED THE TFC DISPLAYED TO THE ACFT PASSING JUST OFF TO OUR L SIDE AND ABOVE US. DUE TO VISUAL CONFIRMATION OF ACFT PASSING US I STOPPED DSCNT AT 26700 FT. OTHER ACFT SHOWED ONLY PLUS 500 FT AS HE WENT BY, SO HE EVIDENTLY WENT APPROX 800 FT BELOW HIS ALT VERY ABRUPTLY. THE REST OF THE FLT WAS UNEVENTFUL.
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.