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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier has TCASII RA to climb with target 400 ft below and target 1000 ft above, head on. Climbs then has RA to descend, then climb again.
| Attributes | |
| ACN | 217922 |
| Time | |
| Date | 199208 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : acy |
| State Reference | NJ |
| Altitude | msl bound lower : 11000 msl bound upper : 12500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport |
| Flight Phase | cruise other |
| Route In Use | enroute airway : v229 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 5400 flight time type : 2500 |
| ASRS Report | 217922 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| 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 : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Our TCASII showed traffic at 12 O'clock and 5 mi flying directly toward us. There were 2 targets, one at 400 ft below us and one at 1000 ft above us. To avoid the 400 ft traffic the TCASII commanded a climb. We were unable to announce our intentions to ATC due to radio congestion. As we passed through 12000 the TCASII commanded a descent (apparently from signals received from the 1000 ft traffic) and then back to a climb command. Passing through 12500 ft we were finally able to warn ATC of our flight deviation. We were eventually given a clearance to maintenance 13000 ft.
Original NASA ASRS Text
Title: ACR HAS TCASII RA TO CLB WITH TARGET 400 FT BELOW AND TARGET 1000 FT ABOVE, HEAD ON. CLBS THEN HAS RA TO DSND, THEN CLB AGAIN.
Narrative: OUR TCASII SHOWED TFC AT 12 O'CLOCK AND 5 MI FLYING DIRECTLY TOWARD US. THERE WERE 2 TARGETS, ONE AT 400 FT BELOW US AND ONE AT 1000 FT ABOVE US. TO AVOID THE 400 FT TFC THE TCASII COMMANDED A CLB. WE WERE UNABLE TO ANNOUNCE OUR INTENTIONS TO ATC DUE TO RADIO CONGESTION. AS WE PASSED THROUGH 12000 THE TCASII COMMANDED A DSCNT (APPARENTLY FROM SIGNALS RECEIVED FROM THE 1000 FT TFC) AND THEN BACK TO A CLB COMMAND. PASSING THROUGH 12500 FT WE WERE FINALLY ABLE TO WARN ATC OF OUR FLT DEV. WE WERE EVENTUALLY GIVEN A CLRNC TO MAINT 13000 FT.
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.