 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
An medium large transport air carrier flight had a TCASII warning along with ATC advisory about some 'pop-up' traffic. Traffic was not seen visually.
| Attributes | |
| ACN | 208215 |
| Time | |
| Date | 199204 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sjc |
| State Reference | CA |
| Altitude | msl bound lower : 8000 msl bound upper : 10300 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zme |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors enroute airway : oak |
| Flight Plan | IFR |
| 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 : 3500 flight time type : 500 |
| ASRS Report | 208215 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Flight had been cleared to 8000 and to intercept sjc 30L localizer. Passing 9700 ft MSL approach told us to maintain 10000 ft MSL and advised us of pop-up traffic at 12 O'clock at 9500 ft MSL. TCASII showed a late pop-up of a TA on the nose within 1 NM 200 ft low. TCASII immediately followed with a RA to monitor vertical speed and the changed to climb RA. Captain followed rate of climb which required a level off at 10300 ft MSL -- never saw traffic visually. Once clear of traffic as indicated by TCASII we descended to 10000 ft MSL. Then continued approach and normal landing to sjc. TCASII worked very good in this situation -- but don't know why it had a last second pop-up of the traffic -- same as ATC.
Original NASA ASRS Text
Title: AN MLG ACR FLT HAD A TCASII WARNING ALONG WITH ATC ADVISORY ABOUT SOME 'POP-UP' TFC. TFC WAS NOT SEEN VISUALLY.
Narrative: FLT HAD BEEN CLRED TO 8000 AND TO INTERCEPT SJC 30L LOC. PASSING 9700 FT MSL APCH TOLD US TO MAINTAIN 10000 FT MSL AND ADVISED US OF POP-UP TFC AT 12 O'CLOCK AT 9500 FT MSL. TCASII SHOWED A LATE POP-UP OF A TA ON THE NOSE WITHIN 1 NM 200 FT LOW. TCASII IMMEDIATELY FOLLOWED WITH A RA TO MONITOR VERT SPD AND THE CHANGED TO CLB RA. CAPT FOLLOWED RATE OF CLB WHICH REQUIRED A LEVEL OFF AT 10300 FT MSL -- NEVER SAW TFC VISUALLY. ONCE CLR OF TFC AS INDICATED BY TCASII WE DSNDED TO 10000 FT MSL. THEN CONTINUED APCH AND NORMAL LNDG TO SJC. TCASII WORKED VERY GOOD IN THIS SITUATION -- BUT DON'T KNOW WHY IT HAD A LAST SECOND POP-UP OF THE TFC -- SAME AS ATC.
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.