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MD80 crew responds to TCASII RA after being cleared to altitude in conflict with other traffic in ZID airspace.
| Attributes | |
| ACN | 420262 |
| Time | |
| Date | 199811 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bwg |
| State Reference | KY |
| Altitude | msl bound lower : 28700 msl bound upper : 29000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 420262 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 420260 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | vertical : 700 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Level at FL310, checked in with ZID level FL310. We had light chop/turbulence and had a jolt of moderate turbulence. I requested ride report. Was told FL280 had better ride. Requested FL280. Stood by and was cleared to descend to FL280, turn left 180 degrees for in-trail spacing to dfw following MD90. As we came onto 180 degree heading, received TA. Saw MD90 at 1200 ft, apparently level at FL280. First officer was flying and he remarked about why they would turn us into traffic. Then received RA of climb. First officer disconnected autoplt and began climb. Received RA at FL287. At that time ATC called and asked what altitude we were going to and I advised FL280. Didn't tell him yet we were responding to RA. He said we were only cleared to FL290, climb now. We were back to FL290 at this time and the MD90 crew came on frequency and wanted to know what we were doing. ATC then told us to call when on ground. We had used the point and shoot -- I read back cleared to FL280, pointed and first officer verified. We were perplexed at the FL290. Neither one of us had heard that restr. I called ZID and spoke with area supervisor and he said it had been their error, we had been cleared to FL280 and acknowledged FL280. They had pulled the tapes and verified this.
Original NASA ASRS Text
Title: MD80 CREW RESPONDS TO TCASII RA AFTER BEING CLRED TO ALT IN CONFLICT WITH OTHER TFC IN ZID AIRSPACE.
Narrative: LEVEL AT FL310, CHKED IN WITH ZID LEVEL FL310. WE HAD LIGHT CHOP/TURB AND HAD A JOLT OF MODERATE TURB. I REQUESTED RIDE RPT. WAS TOLD FL280 HAD BETTER RIDE. REQUESTED FL280. STOOD BY AND WAS CLRED TO DSND TO FL280, TURN L 180 DEGS FOR IN-TRAIL SPACING TO DFW FOLLOWING MD90. AS WE CAME ONTO 180 DEG HDG, RECEIVED TA. SAW MD90 AT 1200 FT, APPARENTLY LEVEL AT FL280. FO WAS FLYING AND HE REMARKED ABOUT WHY THEY WOULD TURN US INTO TFC. THEN RECEIVED RA OF CLB. FO DISCONNECTED AUTOPLT AND BEGAN CLB. RECEIVED RA AT FL287. AT THAT TIME ATC CALLED AND ASKED WHAT ALT WE WERE GOING TO AND I ADVISED FL280. DIDN'T TELL HIM YET WE WERE RESPONDING TO RA. HE SAID WE WERE ONLY CLRED TO FL290, CLB NOW. WE WERE BACK TO FL290 AT THIS TIME AND THE MD90 CREW CAME ON FREQ AND WANTED TO KNOW WHAT WE WERE DOING. ATC THEN TOLD US TO CALL WHEN ON GND. WE HAD USED THE POINT AND SHOOT -- I READ BACK CLRED TO FL280, POINTED AND FO VERIFIED. WE WERE PERPLEXED AT THE FL290. NEITHER ONE OF US HAD HEARD THAT RESTR. I CALLED ZID AND SPOKE WITH AREA SUPVR AND HE SAID IT HAD BEEN THEIR ERROR, WE HAD BEEN CLRED TO FL280 AND ACKNOWLEDGED FL280. THEY HAD PULLED THE TAPES AND VERIFIED THIS.
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.