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B727 initiates TCASII maneuver when vectors by sju from a B757 are insufficient for standard separation.
| Attributes | |
| ACN | 506673 |
| Time | |
| Date | 200103 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : sju.vortac |
| State Reference | PR |
| Altitude | msl bound lower : 4500 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Turbulence |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | climbout : initial ground : maintenance |
| Route In Use | departure : on vectors departure sid : jaaws 9 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : tjsj.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : instrument pilot : flight engineer pilot : cfi pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 123 flight time total : 6133 flight time type : 2052 |
| ASRS Report | 506673 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : private pilot : instrument pilot : flight engineer pilot : commercial |
| Experience | flight time last 90 days : 150 flight time total : 2500 flight time type : 150 |
| ASRS Report | 506396 |
| Events | |
| Anomaly | conflict : airborne critical non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : radar other flight crewa other flight crewb |
| Resolutory Action | controller : issued alert flight crew : took precautionary avoidance action flight crew : took evasive action |
| Miss Distance | vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance Weather |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
On departure out of tjsj runway 8. We were climbing out on vectors to intercept the jaaws 9 departure profile (326 degree radial off of sju VOR). We had just intercepted the jaaws 9 326 degree radial at approximately 4000 ft MSL in VMC when departure control gave us a traffic vector of 20 degrees to the right. This vector put us in IMC. The TCASII system was being displayed on the WX radar scope, on the 10 NM range, no WX mode. Because we were entering IMC the radar scope mode was switched to the WX mode and the range was switched to the 30 NM range. These selections enabled the radar scope to display TCASII and WX. At the same time the above selections were being made, departure control gave us a TA. We reported to departure we had no visual contact with the traffic because we were in IMC. Within seconds of the traffic call, a TCASII TA was given by the TCASII system followed shortly by an RA warning. The RA warning gave a 'descend now' advisory. The descent rate displayed by the TCASII was 4000 ft down. We followed the TCASII advisory until the all clear signal was given. We advised departure control of the TCASII a warning and then continued our climb. Departure control apologized for the vectoring problems that led to the TCASII warnings. Cause: poor traffic flow and vectoring by departure control. Prevention: better traffic monitoring by departure control and a requirement for all part 135 and part 121 cargo carriers to be required to install and use TCASII. Note: normally the aircraft used on this route is not equipped with TCASII. Luckily, we had an aircraft with a TCASII system this day.
Original NASA ASRS Text
Title: B727 INITIATES TCASII MANEUVER WHEN VECTORS BY SJU FROM A B757 ARE INSUFFICIENT FOR STANDARD SEPARATION.
Narrative: ON DEP OUT OF TJSJ RWY 8. WE WERE CLBING OUT ON VECTORS TO INTERCEPT THE JAAWS 9 DEP PROFILE (326 DEG RADIAL OFF OF SJU VOR). WE HAD JUST INTERCEPTED THE JAAWS 9 326 DEG RADIAL AT APPROX 4000 FT MSL IN VMC WHEN DEP CTL GAVE US A TFC VECTOR OF 20 DEGS TO THE R. THIS VECTOR PUT US IN IMC. THE TCASII SYS WAS BEING DISPLAYED ON THE WX RADAR SCOPE, ON THE 10 NM RANGE, NO WX MODE. BECAUSE WE WERE ENTERING IMC THE RADAR SCOPE MODE WAS SWITCHED TO THE WX MODE AND THE RANGE WAS SWITCHED TO THE 30 NM RANGE. THESE SELECTIONS ENABLED THE RADAR SCOPE TO DISPLAY TCASII AND WX. AT THE SAME TIME THE ABOVE SELECTIONS WERE BEING MADE, DEP CTL GAVE US A TA. WE RPTED TO DEP WE HAD NO VISUAL CONTACT WITH THE TFC BECAUSE WE WERE IN IMC. WITHIN SECONDS OF THE TFC CALL, A TCASII TA WAS GIVEN BY THE TCASII SYS FOLLOWED SHORTLY BY AN RA WARNING. THE RA WARNING GAVE A 'DSND NOW' ADVISORY. THE DSCNT RATE DISPLAYED BY THE TCASII WAS 4000 FT DOWN. WE FOLLOWED THE TCASII ADVISORY UNTIL THE ALL CLR SIGNAL WAS GIVEN. WE ADVISED DEP CTL OF THE TCASII A WARNING AND THEN CONTINUED OUR CLB. DEP CTL APOLOGIZED FOR THE VECTORING PROBS THAT LED TO THE TCASII WARNINGS. CAUSE: POOR TFC FLOW AND VECTORING BY DEP CTL. PREVENTION: BETTER TFC MONITORING BY DEP CTL AND A REQUIREMENT FOR ALL PART 135 AND PART 121 CARGO CARRIERS TO BE REQUIRED TO INSTALL AND USE TCASII. NOTE: NORMALLY THE ACFT USED ON THIS RTE IS NOT EQUIPPED WITH TCASII. LUCKILY, WE HAD AN ACFT WITH A TCASII SYS THIS DAY.
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.