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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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ARTCC interfacility coordination air carrier Y climb through occupied altitude TCASII RA descend had less than standard separation with air carrier X TCASII TA RA climb non compliance with ATC instructions. System error.
| Attributes | |
| ACN | 227190 |
| Time | |
| Date | 199211 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ewo |
| State Reference | KY |
| Altitude | msl bound lower : 37000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| 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 Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : flight data |
| Qualification | controller : non radar controller : developmental |
| Experience | controller non radar : 1 |
| ASRS Report | 227190 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 2 controller radar : 5 |
| ASRS Report | 226561 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 18000 vertical : 300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Inter Facility Coordination Failure Operational Error |
Narrative:
Air carrier X was northbound at FL370, air carrier Y was wbound at FL350. The sector was extremely busy at the time of the incident. Air carrier Y requested and was given FL390. Conflict alert went off and both aircraft were given left turns and air carrier X was told to descend to FL350 in an attempt to swap altitudes but it was too late and aedp went off. Supplemental information from acn 226561: I was working mys radar when I accepted handoff and communications on air carrier X. Sme radar requested that I turn air carrier X to a 270 degree heading and descend to FL350 from FL370 and to expedite. I complied to the above requests. The traffic for air carrier X was at FL350 climbing to FL390. Air carrier X reported an RA and took action. Supplemental information from acn 226838: air carrier X at FL370, 190 NM south of okk, 350 degree heading, directed to turn to 270 degrees by controller. Just starting turn, TCASII showed air carrier Y right in front of us at FL363 and climbing. TCASII traffic warning followed immediately by RA to climb. While turning left tried to climb aircraft, other aircraft now showed FL365 on HSI. Due to maximum altitude for aircraft, sustained a shudder (either mach buffet or stall buffet). While in turn controller then gave us a descent clearance to FL350. We informed him that we had a TCASII RA climb and were trying to hold what we had. After approximately 15 seconds, RA stopped and we descended to FL350. 2 passenger complained of injuries. One a sore knee, other sore back. Supplemental information from acn 226834: several thoughts and suggestions occurred to us afterward: 1) the TCASII resolution did not take into account the capability of the aircraft. 2) maybe a TCASII climb should be treated like a GPWS warning. 3) it was difficult to identify the location of air carrier Y as both screens were on the 320 NM scale. It might be a good idea for 1 pilot to be on a smaller scale. Supplemental information from acn 226813: air carrier Y cleared to climb to FL230. At FL365 ATC controller issued an immediate left turn to 180 degrees. Aircraft was headed 260 degrees at this time. TCASII gave an RA. Autoplt was disconnected and aircraft was descended to FL360. Conflict was cleared on TCASII. Aircraft leveled off at FL360. Later cleared to FL390 and back on airway.
Original NASA ASRS Text
Title: ARTCC INTERFAC COORD ACR Y CLB THROUGH OCCUPIED ALT TCASII RA DSND HAD LTSS WITH ACR X TCASII TA RA CLB NON COMPLIANCE WITH ATC INSTRUCTIONS. SYS ERROR.
Narrative: ACR X WAS NBOUND AT FL370, ACR Y WAS WBOUND AT FL350. THE SECTOR WAS EXTREMELY BUSY AT THE TIME OF THE INCIDENT. ACR Y REQUESTED AND WAS GIVEN FL390. CONFLICT ALERT WENT OFF AND BOTH ACFT WERE GIVEN L TURNS AND ACR X WAS TOLD TO DSND TO FL350 IN AN ATTEMPT TO SWAP ALTS BUT IT WAS TOO LATE AND AEDP WENT OFF. SUPPLEMENTAL INFO FROM ACN 226561: I WAS WORKING MYS RADAR WHEN I ACCEPTED HDOF AND COMS ON ACR X. SME RADAR REQUESTED THAT I TURN ACR X TO A 270 DEG HDG AND DSND TO FL350 FROM FL370 AND TO EXPEDITE. I COMPLIED TO THE ABOVE REQUESTS. THE TFC FOR ACR X WAS AT FL350 CLBING TO FL390. ACR X RPTED AN RA AND TOOK ACTION. SUPPLEMENTAL INFO FROM ACN 226838: ACR X AT FL370, 190 NM S OF OKK, 350 DEG HDG, DIRECTED TO TURN TO 270 DEGS BY CTLR. JUST STARTING TURN, TCASII SHOWED ACR Y RIGHT IN FRONT OF US AT FL363 AND CLBING. TCASII TFC WARNING FOLLOWED IMMEDIATELY BY RA TO CLB. WHILE TURNING L TRIED TO CLB ACFT, OTHER ACFT NOW SHOWED FL365 ON HSI. DUE TO MAX ALT FOR ACFT, SUSTAINED A SHUDDER (EITHER MACH BUFFET OR STALL BUFFET). WHILE IN TURN CTLR THEN GAVE US A DSCNT CLRNC TO FL350. WE INFORMED HIM THAT WE HAD A TCASII RA CLB AND WERE TRYING TO HOLD WHAT WE HAD. AFTER APPROX 15 SECONDS, RA STOPPED AND WE DSNDED TO FL350. 2 PAX COMPLAINED OF INJURIES. ONE A SORE KNEE, OTHER SORE BACK. SUPPLEMENTAL INFO FROM ACN 226834: SEVERAL THOUGHTS AND SUGGESTIONS OCCURRED TO US AFTERWARD: 1) THE TCASII RESOLUTION DID NOT TAKE INTO ACCOUNT THE CAPABILITY OF THE ACFT. 2) MAYBE A TCASII CLB SHOULD BE TREATED LIKE A GPWS WARNING. 3) IT WAS DIFFICULT TO IDENT THE LOCATION OF ACR Y AS BOTH SCREENS WERE ON THE 320 NM SCALE. IT MIGHT BE A GOOD IDEA FOR 1 PLT TO BE ON A SMALLER SCALE. SUPPLEMENTAL INFO FROM ACN 226813: ACR Y CLRED TO CLB TO FL230. AT FL365 ATC CTLR ISSUED AN IMMEDIATE L TURN TO 180 DEGS. ACFT WAS HEADED 260 DEGS AT THIS TIME. TCASII GAVE AN RA. AUTOPLT WAS DISCONNECTED AND ACFT WAS DSNDED TO FL360. CONFLICT WAS CLRED ON TCASII. ACFT LEVELED OFF AT FL360. LATER CLRED TO FL390 AND BACK ON AIRWAY.
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.