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A cpr flight crew has an encounter with a VFR C152 and they credit their TCASII system for allowing them to avoid a collision.
| Attributes | |
| ACN | 371260 |
| Time | |
| Date | 199706 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : hya |
| State Reference | MA |
| Altitude | msl bound lower : 9800 msl bound upper : 10300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | general aviation : corporate |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : zny |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Cessna 152 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 3000 flight time type : 160 |
| ASRS Report | 371260 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
Flight from hya to iad, cleared to climb to 10000 ft. Given traffic alert by ATC 'traffic at 10 O'clock position, at 10500 ft VFR type unknown.' crew proceeded to scan left for traffic along with TCASII. Never acknowledged traffic in sight to ATC. Given clearance to climb to 19000 ft. Crew still scanning for traffic, there was no traffic on TCASII at approximately 9000 ft. Traffic appeared on TCASII (was approaching us from 1-2 O'clock position) a C152 VFR. Received RA on TCASII to 'monitor vertical speed' stopped climb at 9800 ft, traffic passed overhead approximately 500 ft above us. Had we not had TCASII on board we would have flown directly into this aircraft. Traffic was not where it was expected, (10 O'clock position) came from 2 O'clock position. Crew never acknowledged 'traffic in sight,' should not have been cleared to climb to FL190 until traffic was in sight or no longer a factor.
Original NASA ASRS Text
Title: A CPR FLC HAS AN ENCOUNTER WITH A VFR C152 AND THEY CREDIT THEIR TCASII SYS FOR ALLOWING THEM TO AVOID A COLLISION.
Narrative: FLT FROM HYA TO IAD, CLRED TO CLB TO 10000 FT. GIVEN TFC ALERT BY ATC 'TFC AT 10 O'CLOCK POS, AT 10500 FT VFR TYPE UNKNOWN.' CREW PROCEEDED TO SCAN L FOR TFC ALONG WITH TCASII. NEVER ACKNOWLEDGED TFC IN SIGHT TO ATC. GIVEN CLRNC TO CLB TO 19000 FT. CREW STILL SCANNING FOR TFC, THERE WAS NO TFC ON TCASII AT APPROX 9000 FT. TFC APPEARED ON TCASII (WAS APCHING US FROM 1-2 O'CLOCK POS) A C152 VFR. RECEIVED RA ON TCASII TO 'MONITOR VERT SPD' STOPPED CLB AT 9800 FT, TFC PASSED OVERHEAD APPROX 500 FT ABOVE US. HAD WE NOT HAD TCASII ON BOARD WE WOULD HAVE FLOWN DIRECTLY INTO THIS ACFT. TFC WAS NOT WHERE IT WAS EXPECTED, (10 O'CLOCK POS) CAME FROM 2 O'CLOCK POS. CREW NEVER ACKNOWLEDGED 'TFC IN SIGHT,' SHOULD NOT HAVE BEEN CLRED TO CLB TO FL190 UNTIL TFC WAS IN SIGHT OR NO LONGER A FACTOR.
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.