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Flight crew reports TCAS event while descending to 11000 feet with climbing B737 which fails to level at 10000 feet.
| Attributes | |
| ACN | 742775 |
| Time | |
| Date | 200706 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : atl.airport |
| State Reference | GA |
| Altitude | msl single value : 11800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : a80.tracon tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : a80.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 742775 |
| Events | |
| Anomaly | conflict : airborne critical |
| Independent Detector | aircraft equipment : tcas other controllera other flight crewa |
| Resolutory Action | controller : issued advisory flight crew : took evasive action |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Ambiguous |
Narrative:
ATC screwed up. We were descending on the arrival about 5 mi northwest of nofiv intersection; descending through 11800 ft; when ATC called traffic climbing below that was supposed to level at 10000 ft. We got a traffic alert and went outside to identify the aircraft. We got a visual on the traffic and at the same time received a 'climb' RA. I complied with the RA while maintaining visual separation with the traffic. We then received a 'monitor vertical speed' and a 'clear of conflict.' we reported the TCAS RA to ATC. The response was gentle and not noticed by the flight attendants or passenger. The offending aircraft was a B737.
Original NASA ASRS Text
Title: FLT CREW REPORTS TCAS EVENT WHILE DESCENDING TO 11000 FEET WITH CLIMBING B737 WHICH FAILS TO LEVEL AT 10000 FEET.
Narrative: ATC SCREWED UP. WE WERE DSNDING ON THE ARR ABOUT 5 MI NW OF NOFIV INTXN; DSNDING THROUGH 11800 FT; WHEN ATC CALLED TFC CLBING BELOW THAT WAS SUPPOSED TO LEVEL AT 10000 FT. WE GOT A TFC ALERT AND WENT OUTSIDE TO IDENT THE ACFT. WE GOT A VISUAL ON THE TFC AND AT THE SAME TIME RECEIVED A 'CLB' RA. I COMPLIED WITH THE RA WHILE MAINTAINING VISUAL SEPARATION WITH THE TFC. WE THEN RECEIVED A 'MONITOR VERT SPD' AND A 'CLR OF CONFLICT.' WE RPTED THE TCAS RA TO ATC. THE RESPONSE WAS GENTLE AND NOT NOTICED BY THE FLT ATTENDANTS OR PAX. THE OFFENDING ACFT WAS A B737.
Data retrieved from NASA's ASRS site as of January 2009 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.