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Flight crew of medium large transport climbing out of aus had TCASII RA to descent. Aircraft was descended and TCASII cleared.
| Attributes | |
| ACN | 195618 |
| Time | |
| Date | 199111 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : aus |
| State Reference | TX |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : aus tower : jfk |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 120 flight time total : 3500 flight time type : 120 |
| ASRS Report | 195618 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 400 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After takeoff from aus, a heading of 240 degree was assigned by aus tower. Altitude assigned was 4000 ft. Once established the frequency was very busy and there was also a general aviation aircraft on the frequency with a poor radio that required much time to communication effectively. Once radio contact was established, a climb to 10000 was given by departure control. Within 1 min of initiating the climb, a TCASII 'traffic' alert arose. The PNF scaled the TCASII to the 5 NM range and shortly after a 'descend, descend, descend' advisory was given by the TCASII. The PF responded accordingly and a 'clear of conflict' was later verbalized by the TCASII. Aircraft was never visually seen. Cause of proximity. I can only guess that the controller may not have seen the other traffic on his scope. However, the TCASII system was proven beneficial to have. However, I do not recommend it for general aviation aircraft. I believe a transponder with encoding altimeter is more than sufficient. Maybe an initial climb clearance or greater than 4000 ft would have prevented the mishap.
Original NASA ASRS Text
Title: FLC OF MLG CLBING OUT OF AUS HAD TCASII RA TO DSCNT. ACFT WAS DSNDED AND TCASII CLRED.
Narrative: AFTER TKOF FROM AUS, A HDG OF 240 DEG WAS ASSIGNED BY AUS TWR. ALT ASSIGNED WAS 4000 FT. ONCE ESTABLISHED THE FREQ WAS VERY BUSY AND THERE WAS ALSO A GENERAL AVIATION ACFT ON THE FREQ WITH A POOR RADIO THAT REQUIRED MUCH TIME TO COM EFFECTIVELY. ONCE RADIO CONTACT WAS ESTABLISHED, A CLB TO 10000 WAS GIVEN BY DEP CTL. WITHIN 1 MIN OF INITIATING THE CLB, A TCASII 'TFC' ALERT AROSE. THE PNF SCALED THE TCASII TO THE 5 NM RANGE AND SHORTLY AFTER A 'DSND, DSND, DSND' ADVISORY WAS GIVEN BY THE TCASII. THE PF RESPONDED ACCORDINGLY AND A 'CLR OF CONFLICT' WAS LATER VERBALIZED BY THE TCASII. ACFT WAS NEVER VISUALLY SEEN. CAUSE OF PROX. I CAN ONLY GUESS THAT THE CTLR MAY NOT HAVE SEEN THE OTHER TFC ON HIS SCOPE. HOWEVER, THE TCASII SYS WAS PROVEN BENEFICIAL TO HAVE. HOWEVER, I DO NOT RECOMMEND IT FOR GENERAL AVIATION ACFT. I BELIEVE A TRANSPONDER WITH ENCODING ALTIMETER IS MORE THAN SUFFICIENT. MAYBE AN INITIAL CLB CLRNC OR GREATER THAN 4000 FT WOULD HAVE PREVENTED THE MISHAP.
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.