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TCASII RA induces PIC of air carrier medium large transport to execute an evasive action climb in this altitude deviation altitude excursion incident.
| Attributes | |
| ACN | 183920 |
| Time | |
| Date | 199107 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : lrp airport : phl |
| State Reference | PA |
| Altitude | msl bound lower : 8000 msl bound upper : 8300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : phl |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 4200 flight time type : 400 |
| ASRS Report | 183920 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 600 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
On STAR (bucks one) to phl at 8000, cleared to 6000 ft. Target popped up on TCAS screen 3-4 mi ahead and below us (climbing). TCAS issued traffic advisory followed shortly by resolution advisory to climb. Intruder was 600 ft below and 1 mi horizontal when we climbed to 8300 ft. At 8300 ft, TCAS issued a 'clear of conflict'. At this point we informed ATC of deviation, altitude, and began descent to 6000 ft. Never saw intruder aircraft. P.south. I think TCAS is an excellent system.
Original NASA ASRS Text
Title: TCASII RA INDUCES PIC OF ACR MLG TO EXECUTE AN EVASIVE ACTION CLB IN THIS ALT DEV ALT EXCURSION INCIDENT.
Narrative: ON STAR (BUCKS ONE) TO PHL AT 8000, CLRED TO 6000 FT. TARGET POPPED UP ON TCAS SCREEN 3-4 MI AHEAD AND BELOW US (CLBING). TCAS ISSUED TFC ADVISORY FOLLOWED SHORTLY BY RESOLUTION ADVISORY TO CLB. INTRUDER WAS 600 FT BELOW AND 1 MI HORIZ WHEN WE CLBED TO 8300 FT. AT 8300 FT, TCAS ISSUED A 'CLR OF CONFLICT'. AT THIS POINT WE INFORMED ATC OF DEV, ALT, AND BEGAN DSCNT TO 6000 FT. NEVER SAW INTRUDER ACFT. P.S. I THINK TCAS IS AN EXCELLENT SYS.
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.