 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier X reacting to TCASII RA descends into another aircraft below resulting in less than standard separation. Pilot states that he is complying with company policy.
| Attributes | |
| ACN | 351564 |
| Time | |
| Date | 199610 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ewr |
| State Reference | NJ |
| Altitude | msl bound lower : 4700 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90 |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent : approach |
| Route In Use | arrival other 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 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 14000 flight time type : 600 |
| ASRS Report | 351564 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : required legal separation non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 700 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
We were level at 5000 ft on approach to ewr where we received a TA on TCASII 10 O'clock and 2 1/2 to 3 mi. I told the copilot I intended to maneuver if the TA turned to RA. The traffic showed plus .02 or 500 ft high and came down to plus 00 or level then turned to RA with a descend RA command. I complied and asked the copilot to advise center of our maneuver. After some confusion about what specifically we were doing the controller was extremely upset that we descended, indicating that he had traffic for us 1000 ft below and that we were descending into that traffic. We replied that company policy required us to maneuver on RA. As I descended at 1500-1700 FPM to 4700 ft MSL, the TCASII announced that we were clear of conflict. I returned to 5060 ft. The remainder of the approach and landing were normal. Controllers apparently still believe TCASII is a problem not a solution.
Original NASA ASRS Text
Title: ACR X REACTING TO TCASII RA DSNDS INTO ANOTHER ACFT BELOW RESULTING IN LTSS. PLT STATES THAT HE IS COMPLYING WITH COMPANY POLICY.
Narrative: WE WERE LEVEL AT 5000 FT ON APCH TO EWR WHERE WE RECEIVED A TA ON TCASII 10 O'CLOCK AND 2 1/2 TO 3 MI. I TOLD THE COPLT I INTENDED TO MANEUVER IF THE TA TURNED TO RA. THE TFC SHOWED PLUS .02 OR 500 FT HIGH AND CAME DOWN TO PLUS 00 OR LEVEL THEN TURNED TO RA WITH A DSND RA COMMAND. I COMPLIED AND ASKED THE COPLT TO ADVISE CTR OF OUR MANEUVER. AFTER SOME CONFUSION ABOUT WHAT SPECIFICALLY WE WERE DOING THE CTLR WAS EXTREMELY UPSET THAT WE DSNDED, INDICATING THAT HE HAD TFC FOR US 1000 FT BELOW AND THAT WE WERE DSNDING INTO THAT TFC. WE REPLIED THAT COMPANY POLICY REQUIRED US TO MANEUVER ON RA. AS I DSNDED AT 1500-1700 FPM TO 4700 FT MSL, THE TCASII ANNOUNCED THAT WE WERE CLR OF CONFLICT. I RETURNED TO 5060 FT. THE REMAINDER OF THE APCH AND LNDG WERE NORMAL. CTLRS APPARENTLY STILL BELIEVE TCASII IS A PROB NOT A SOLUTION.
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.