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B737 first officer reported a TCAS RA and an near midair collision while on an ATC cleared descent to mdpp airport.
| Attributes | |
| ACN | 1525807 |
| Time | |
| Date | 201803 |
| Place | |
| Locale Reference | MDPP.Airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | Cruise |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Type 5672 |
| Events | |
| Anomaly | ATC Issue All Types Conflict NMAC |
| Miss Distance | Vertical 500 |
Narrative:
While on an ATC cleared descent through 18;000 ft to 15;000 ft; with the autopilot on; in VNAV; an aircraft appeared on our TCAS in front of us; approximately 800 ft below us; and approximately 2 miles away. We received a TA; and looked out to acquire the aircraft visually. No sooner did we look up then we got an RA to 'climb; climb'. I disengaged the automation and responded to the RA climb as per the RA red box on the display. The traffic was a multi turboprop; flying east to west; at 17;500 ft presumably VFR. The captain proceeded to tell ATC about our RA as well as the traffic we flew over. Atcs response was merely a 'roger'. ATC never called out the traffic; and seemed un-phased by the near miss. My approximation put the other aircraft less than 500 ft vertically and nearly 0 ft laterally once we flew over him.
Original NASA ASRS Text
Title: B737 First Officer reported a TCAS RA and an NMAC while on an ATC cleared descent to MDPP airport.
Narrative: While on an ATC cleared descent through 18;000 ft to 15;000 ft; with the autopilot on; in VNAV; an aircraft appeared on our TCAS in front of us; approximately 800 ft below us; and approximately 2 miles away. We received a TA; and looked out to acquire the aircraft visually. No sooner did we look up then we got an RA to 'Climb; Climb'. I disengaged the automation and responded to the RA climb as per the RA red box on the display. The traffic was a multi turboprop; flying east to west; at 17;500 ft presumably VFR. The Captain proceeded to tell ATC about our RA as well as the traffic we flew over. ATCs response was merely a 'roger'. ATC never called out the traffic; and seemed un-phased by the near miss. My approximation put the other aircraft less than 500 ft vertically and nearly 0 ft laterally once we flew over him.
Data retrieved from NASA's ASRS site 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.