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Air carrier large transport climbs into a conflict when a vector clearance is blocked. TCASII resolved conflict.
| Attributes | |
| ACN | 241711 |
| Time | |
| Date | 199305 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : yul |
| State Reference | PQ |
| Altitude | msl bound lower : 7800 msl bound upper : 7800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : yul |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| 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 |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 150 flight time total : 8500 flight time type : 3000 |
| ASRS Report | 241711 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : flight engineer pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 190 flight time total : 4900 flight time type : 1500 |
| ASRS Report | 242131 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : far non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 5000 vertical : 900 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Out of yul IFR with good rate of climb on assigned heading of 230 degrees to intercept 204 degree radial outbound off of yul. At approximately 7800 ft in IFR we received TCASII TA. Noted aircraft on display at 2 O'clock position and 2200 ft higher. We started to evaluate his movement on display and queried controller as we had been cleared to FL230. We received an RA of 'monitor vertical speed' which then changed to 'descend.' at about this time ATC answered us and said to turn to 200 degrees and acted as if nothing would be a problem as he informed us they had been on a heading as well. We continued turn away beyond 200 degrees to approximately 180 degrees and we still closed to less than 1 mi laterally. We were never told by ATC to stop climb, but due to RA we actually descended approximately 800- 1000 ft. We topped out -900 ft below other aircraft before full power climb could be turned into a descent. Other aircraft was air carrier large transport. Controller later stated he gave a turn earlier but was 'blocked.'
Original NASA ASRS Text
Title: ACR LGT CLBS INTO A CONFLICT WHEN A VECTOR CLRNC IS BLOCKED. TCASII RESOLVED CONFLICT.
Narrative: OUT OF YUL IFR WITH GOOD RATE OF CLB ON ASSIGNED HDG OF 230 DEGS TO INTERCEPT 204 DEG RADIAL OUTBOUND OFF OF YUL. AT APPROX 7800 FT IN IFR WE RECEIVED TCASII TA. NOTED ACFT ON DISPLAY AT 2 O'CLOCK POS AND 2200 FT HIGHER. WE STARTED TO EVALUATE HIS MOVEMENT ON DISPLAY AND QUERIED CTLR AS WE HAD BEEN CLRED TO FL230. WE RECEIVED AN RA OF 'MONITOR VERT SPD' WHICH THEN CHANGED TO 'DSND.' AT ABOUT THIS TIME ATC ANSWERED US AND SAID TO TURN TO 200 DEGS AND ACTED AS IF NOTHING WOULD BE A PROB AS HE INFORMED US THEY HAD BEEN ON A HDG AS WELL. WE CONTINUED TURN AWAY BEYOND 200 DEGS TO APPROX 180 DEGS AND WE STILL CLOSED TO LESS THAN 1 MI LATERALLY. WE WERE NEVER TOLD BY ATC TO STOP CLB, BUT DUE TO RA WE ACTUALLY DSNDED APPROX 800- 1000 FT. WE TOPPED OUT -900 FT BELOW OTHER ACFT BEFORE FULL PWR CLB COULD BE TURNED INTO A DSCNT. OTHER ACFT WAS ACR LGT. CTLR LATER STATED HE GAVE A TURN EARLIER BUT WAS 'BLOCKED.'
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.