 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Pilot deviation occurs when the flight crew of widebody transport air carrier receives a TCASII RA and descends climbs to avoid traffic descending from above to below them. ATC does not paint this target. The traffic is not sighted by the crew.
| Attributes | |
| ACN | 325200 |
| Time | |
| Date | 199601 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : slc |
| State Reference | UT |
| Altitude | msl bound lower : 7500 msl bound upper : 8100 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : slc tower : day |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | cruise other descent other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 9000 flight time type : 800 |
| ASRS Report | 325200 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 7000 flight time type : 3500 |
| ASRS Report | 325211 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were level 8000 ft on an assigned heading talking to slc departure. ATC advised us of traffic at 11 O'clock 500 ft below us. I looked at TCASII display and noted 2 targets, one 500 ft low and #2 target 500 ft above at 12:30 position. ATC cleared us to climb to FL230. Hesitated due to 500 ft high traffic. I believe I did slowly get up to 8100 ft while discussing traffic with captain. TCASII gave RA 'descend.' with captain's concurrence initiated descent. Continued closing with both targets of which #2 appeared to have closest cpa. The #2 target had initiated descent at a higher rate than us. At 7500 ft captain notified ATC that we were following a TCASII RA. ATC said that the traffic had us in sight and was descending. (ATC apparently never had radar contact on the target, we were maneuvering to avoid.) at 7500 ft as the captain was talking to ATC because the #2 target was now apparently below us the TCASII gave a 'climb' RA. We reversed our descent and climbed. The captain did get a visual contact on the #1 target as it passed low left. We never visually sighted the #2 target, however, we never really looked for it that hard as I was busy following my TCASII commands on the vsi and the captain was talking and looking for #1. Either our TCASII was giving us a bogus contact or ATC's radar needs some tweaking. Supplemental information from acn 325211: approach control reported only painting 1 target for us (apparently the traffic at 11 O'clock).
Original NASA ASRS Text
Title: PLTDEV OCCURS WHEN THE FLC OF WDB ACR RECEIVES A TCASII RA AND DSNDS CLBS TO AVOID TFC DSNDING FROM ABOVE TO BELOW THEM. ATC DOES NOT PAINT THIS TARGET. THE TFC IS NOT SIGHTED BY THE CREW.
Narrative: WE WERE LEVEL 8000 FT ON AN ASSIGNED HDG TALKING TO SLC DEP. ATC ADVISED US OF TFC AT 11 O'CLOCK 500 FT BELOW US. I LOOKED AT TCASII DISPLAY AND NOTED 2 TARGETS, ONE 500 FT LOW AND #2 TARGET 500 FT ABOVE AT 12:30 POS. ATC CLRED US TO CLB TO FL230. HESITATED DUE TO 500 FT HIGH TFC. I BELIEVE I DID SLOWLY GET UP TO 8100 FT WHILE DISCUSSING TFC WITH CAPT. TCASII GAVE RA 'DSND.' WITH CAPT'S CONCURRENCE INITIATED DSCNT. CONTINUED CLOSING WITH BOTH TARGETS OF WHICH #2 APPEARED TO HAVE CLOSEST CPA. THE #2 TARGET HAD INITIATED DSCNT AT A HIGHER RATE THAN US. AT 7500 FT CAPT NOTIFIED ATC THAT WE WERE FOLLOWING A TCASII RA. ATC SAID THAT THE TFC HAD US IN SIGHT AND WAS DSNDING. (ATC APPARENTLY NEVER HAD RADAR CONTACT ON THE TARGET, WE WERE MANEUVERING TO AVOID.) AT 7500 FT AS THE CAPT WAS TALKING TO ATC BECAUSE THE #2 TARGET WAS NOW APPARENTLY BELOW US THE TCASII GAVE A 'CLB' RA. WE REVERSED OUR DSCNT AND CLBED. THE CAPT DID GET A VISUAL CONTACT ON THE #1 TARGET AS IT PASSED LOW L. WE NEVER VISUALLY SIGHTED THE #2 TARGET, HOWEVER, WE NEVER REALLY LOOKED FOR IT THAT HARD AS I WAS BUSY FOLLOWING MY TCASII COMMANDS ON THE VSI AND THE CAPT WAS TALKING AND LOOKING FOR #1. EITHER OUR TCASII WAS GIVING US A BOGUS CONTACT OR ATC'S RADAR NEEDS SOME TWEAKING. SUPPLEMENTAL INFO FROM ACN 325211: APCH CTL RPTED ONLY PAINTING 1 TARGET FOR US (APPARENTLY THE TFC AT 11 O'CLOCK).
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.