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Flight advised of VFR traffic 500' below. TCAS RA climb. Aircraft climbed to 300' above assigned. Advised center of actions.
| Attributes | |
| ACN | 182590 |
| Time | |
| Date | 199107 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ssi |
| State Reference | GA |
| Altitude | msl bound lower : 9500 msl bound upper : 10300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx tower : lax |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 17200 flight time type : 8900 |
| ASRS Report | 182590 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : atp pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
TCAS RA issued for VFR traffic that was 500' below. We were IFR flight plan assigned 10000' flight MSL. Intruder was VFR at 9500' MSL. Traffic was called by ZJX. No visibility on VFR traffic. No TA issued by TCAS. TCAS issued climb RA. We climbed 300' to 10300' MSL. We advised ZJX of TCAS RA and our subsequent altitude deviation. Returned to assigned altitude of 10000' MSL. ZJX advised that IFR sep criteria was not violated. This type of TCAS advisory is a problem due to the fact that both aircraft were at legal altitudes (VFR/IFR mis). TCAS is a real problem in crowded terminal areas because of numerous TA's at the most inopportune moments, such as on takeoff roll, initial climb and short final. TCAS voice command vol level is much too loud.
Original NASA ASRS Text
Title: FLT ADVISED OF VFR TRAFFIC 500' BELOW. TCAS RA CLIMB. ACFT CLIMBED TO 300' ABOVE ASSIGNED. ADVISED CENTER OF ACTIONS.
Narrative: TCAS RA ISSUED FOR VFR TFC THAT WAS 500' BELOW. WE WERE IFR FLT PLAN ASSIGNED 10000' FLT MSL. INTRUDER WAS VFR AT 9500' MSL. TFC WAS CALLED BY ZJX. NO VIS ON VFR TFC. NO TA ISSUED BY TCAS. TCAS ISSUED CLB RA. WE CLBED 300' TO 10300' MSL. WE ADVISED ZJX OF TCAS RA AND OUR SUBSEQUENT ALT DEVIATION. RETURNED TO ASSIGNED ALT OF 10000' MSL. ZJX ADVISED THAT IFR SEP CRITERIA WAS NOT VIOLATED. THIS TYPE OF TCAS ADVISORY IS A PROB DUE TO THE FACT THAT BOTH ACFT WERE AT LEGAL ALTS (VFR/IFR MIS). TCAS IS A REAL PROB IN CROWDED TERMINAL AREAS BECAUSE OF NUMEROUS TA'S AT THE MOST INOPPORTUNE MOMENTS, SUCH AS ON TKOF ROLL, INITIAL CLB AND SHORT FINAL. TCAS VOICE COMMAND VOL LEVEL IS MUCH TOO LOUD.
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.