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CRJ700 flight crew level at FL350 with ZNY experienced TCAS RA with traffic that reportedly descended below assigned altitude.
| Attributes | |
| ACN | 841437 |
| Time | |
| Date | 200906 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZNY.ARTCC |
| State Reference | NY |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | Regional Jet 700 ER/LR (CRJ700) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | ATC Issue All Types |
Narrative:
We visually observed an aircraft descending towards us within 20 miles. The aircraft appeared to have slowed its descent on TCAS. Within 5 miles; the conflicting aircraft was 400 ft above us and leveling. By 4 miles I told the first officer to go ahead and descend as we received a TCAS RA to descend. I notified ATC of our TCAS descent. We descended as low as 34;750 ft. At that time; the conflicting traffic climbed and passed 1000 ft above us and 4 miles to our right. We then received a 'clear of conflict' from TCAS and returned to FL350. ATC then told us to maintain FL350. Oncoming traffic failed to maintain a safe altitude.
Original NASA ASRS Text
Title: CRJ700 flight crew level at FL350 with ZNY experienced TCAS RA with traffic that reportedly descended below assigned altitude.
Narrative: We visually observed an aircraft descending towards us within 20 miles. The aircraft appeared to have slowed its descent on TCAS. Within 5 miles; the conflicting aircraft was 400 FT above us and leveling. By 4 miles I told the First Officer to go ahead and descend as we received a TCAS RA to descend. I notified ATC of our TCAS descent. We descended as low as 34;750 FT. At that time; the conflicting traffic climbed and passed 1000 FT above us and 4 miles to our right. We then received a 'Clear of Conflict' from TCAS and returned to FL350. ATC then told us to maintain FL350. Oncoming traffic failed to maintain a safe altitude.
Data retrieved from NASA's ASRS site as of April 2012 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.