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TCASII encounter RA alerts descending crj to a potential conflict with opposite direction traffic at their cleared to altitude near air VOR, PA.
| Attributes | |
| ACN | 577533 |
| Time | |
| Date | 200303 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : zob.artcc |
| State Reference | OH |
| Altitude | msl bound lower : 27800 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 700 ER&LR |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | arrival star : cince 4 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain instruction : trainee |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 170 flight time total : 18000 flight time type : 10 |
| ASRS Report | 577533 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer instruction : instructor oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas |
| Resolutory Action | controller : issued new clearance controller : separated traffic flight crew : took precautionary avoidance action |
| Miss Distance | horizontal : 3000 vertical : 800 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
We were cleared to descend to FL260 from above FL280. The IOE captain and I verified the assigned altitude. Descending through FL283, I noticed traffic on TCASII indicating 1 O'clock position, 5-10 mi out, approaching us at a constant position, level at FL270. I contacted ATC to verify our assigned altitude of FL260. It was rapidly becoming apparent that continuing our descent would result in a serious conflict. ATC paused when responding, then asked us to verify level at FL280. We had gone down to FL278, then started a climb to avoid the obvious conflict. ATC was very busy working numerous aircraft on more than 1 frequency. Vectors, speed and altitude changes were constant for all aircraft to maintain spacing and sequencing into cvg. TCASII did its job when ATC was overwhelmed.
Original NASA ASRS Text
Title: TCASII ENCOUNTER RA ALERTS DSNDING CRJ TO A POTENTIAL CONFLICT WITH OPPOSITE DIRECTION TFC AT THEIR CLRED TO ALT NEAR AIR VOR, PA.
Narrative: WE WERE CLRED TO DSND TO FL260 FROM ABOVE FL280. THE IOE CAPT AND I VERIFIED THE ASSIGNED ALT. DSNDING THROUGH FL283, I NOTICED TFC ON TCASII INDICATING 1 O'CLOCK POS, 5-10 MI OUT, APCHING US AT A CONSTANT POS, LEVEL AT FL270. I CONTACTED ATC TO VERIFY OUR ASSIGNED ALT OF FL260. IT WAS RAPIDLY BECOMING APPARENT THAT CONTINUING OUR DSCNT WOULD RESULT IN A SERIOUS CONFLICT. ATC PAUSED WHEN RESPONDING, THEN ASKED US TO VERIFY LEVEL AT FL280. WE HAD GONE DOWN TO FL278, THEN STARTED A CLB TO AVOID THE OBVIOUS CONFLICT. ATC WAS VERY BUSY WORKING NUMEROUS ACFT ON MORE THAN 1 FREQ. VECTORS, SPD AND ALT CHANGES WERE CONSTANT FOR ALL ACFT TO MAINTAIN SPACING AND SEQUENCING INTO CVG. TCASII DID ITS JOB WHEN ATC WAS OVERWHELMED.
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.