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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Near midair collision. Flight crew of a B727-200 stopped their descent on a STAR arrival and climbed in response to a TCASII RA. Twin engine traffic was observed coming in the opposite direction 200 ft below their aircraft.
| Attributes | |
| ACN | 421679 |
| Time | |
| Date | 199812 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ard airport : lga |
| State Reference | PA |
| Altitude | msl bound lower : 12500 msl bound upper : 12700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : n90 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : commercial pilot : atp pilot : instrument pilot : flight engineer |
| Experience | flight time last 90 days : 190 flight time total : 2500 flight time type : 400 |
| ASRS Report | 421679 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 10500 flight time type : 1000 |
| ASRS Report | 422332 |
| Events | |
| Anomaly | conflict : nmac other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 200 |
Narrative:
Descending from 13000 ft to 11000 ft as cleared by ZNY and following the minks 1 arrival into lga, we were switched from ZNY to new york approach and changed frequencys (135.52 to 127.3) while simultaneously intercepting the ard 086 degree radial outbound. During check-in with new york approach, we received a TCASII TA, then RA with a 'climb, climb' voice resolution and a recommended (rfd arc to green band) vsi climb of 3000 FPM. The climb was initiated immediately as we were descending through 12500 ft. The same VFR altitude used by the conflicting traffic approaching from our 12 - 2 O'clock. The climb ended at 13600 ft. We informed ATC immediately during the commencement of the maneuver of our RA and intention to climb. As traffic passed underneath us we recognized the danger of the situation. We told ATC we would file an near midair collision report upon landing in lga. The VFR traffic appeared to be following the rules (altitude, heading, squawk, airspace, etc). Without TCASII, a collision likely would have resulted.
Original NASA ASRS Text
Title: NMAC. FLC OF A B727-200 STOPPED THEIR DSCNT ON A STAR ARR AND CLBED IN RESPONSE TO A TCASII RA. TWIN ENG TFC WAS OBSERVED COMING IN THE OPPOSITE DIRECTION 200 FT BELOW THEIR ACFT.
Narrative: DSNDING FROM 13000 FT TO 11000 FT AS CLRED BY ZNY AND FOLLOWING THE MINKS 1 ARR INTO LGA, WE WERE SWITCHED FROM ZNY TO NEW YORK APCH AND CHANGED FREQS (135.52 TO 127.3) WHILE SIMULTANEOUSLY INTERCEPTING THE ARD 086 DEG RADIAL OUTBOUND. DURING CHK-IN WITH NEW YORK APCH, WE RECEIVED A TCASII TA, THEN RA WITH A 'CLB, CLB' VOICE RESOLUTION AND A RECOMMENDED (RFD ARC TO GREEN BAND) VSI CLB OF 3000 FPM. THE CLB WAS INITIATED IMMEDIATELY AS WE WERE DSNDING THROUGH 12500 FT. THE SAME VFR ALT USED BY THE CONFLICTING TFC APCHING FROM OUR 12 - 2 O'CLOCK. THE CLB ENDED AT 13600 FT. WE INFORMED ATC IMMEDIATELY DURING THE COMMENCEMENT OF THE MANEUVER OF OUR RA AND INTENTION TO CLB. AS TFC PASSED UNDERNEATH US WE RECOGNIZED THE DANGER OF THE SIT. WE TOLD ATC WE WOULD FILE AN NMAC RPT UPON LNDG IN LGA. THE VFR TFC APPEARED TO BE FOLLOWING THE RULES (ALT, HDG, SQUAWK, AIRSPACE, ETC). WITHOUT TCASII, A COLLISION LIKELY WOULD HAVE RESULTED.
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.