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A TCASII RA was the warning that provided separation of traffic over aruba when an aircraft entered curacao control's airspace without notice.
| Attributes | |
| ACN | 472753 |
| Time | |
| Date | 200005 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| State Reference | FO |
| Altitude | msl single value : 37000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport |
| Operating Under FAR Part | Part 129 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : multi engine |
| Events | |
| Anomaly | airspace violation : entry altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas |
| Resolutory Action | flight crew : took evasive action flight crew : returned to assigned altitude |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Cruise flight over aba and TCASII announced 'traffic, traffic, descend, descend.' I looked at the TCASII, saw a target at 2 O'clock position co-altitude, disconnected both autoplt and autothrottles and descended to the commanded 1500 FPM descent. Looked out again and saw aircraft passing 2:30 O'clock position and then heard TCASII 'monitor vertical speed.' I leveled off at FL365 and once clear of traffic I ascended to FL370. Curacao said air carrier Y had entered their airspace just south of aruba without having checked in at FL370. There was never a TA, only an RA and there had been no targets on TCASII prior to the alert. TCASII averted a very dangerous situation.
Original NASA ASRS Text
Title: A TCASII RA WAS THE WARNING THAT PROVIDED SEPARATION OF TFC OVER ARUBA WHEN AN ACFT ENTERED CURACAO CTL'S AIRSPACE WITHOUT NOTICE.
Narrative: CRUISE FLT OVER ABA AND TCASII ANNOUNCED 'TFC, TFC, DSND, DSND.' I LOOKED AT THE TCASII, SAW A TARGET AT 2 O'CLOCK POS CO-ALT, DISCONNECTED BOTH AUTOPLT AND AUTOTHROTTLES AND DSNDED TO THE COMMANDED 1500 FPM DSCNT. LOOKED OUT AGAIN AND SAW ACFT PASSING 2:30 O'CLOCK POS AND THEN HEARD TCASII 'MONITOR VERT SPD.' I LEVELED OFF AT FL365 AND ONCE CLR OF TFC I ASCENDED TO FL370. CURACAO SAID ACR Y HAD ENTERED THEIR AIRSPACE JUST S OF ARUBA WITHOUT HAVING CHKED IN AT FL370. THERE WAS NEVER A TA, ONLY AN RA AND THERE HAD BEEN NO TARGETS ON TCASII PRIOR TO THE ALERT. TCASII AVERTED A VERY DANGEROUS SIT.
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.