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B737-800 crew and a B727 had less than legal separation in atl class B airspace.
| Attributes | |
| ACN | 633359 |
| Time | |
| Date | 200410 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : atl.vortac |
| State Reference | GA |
| Altitude | agl single value : 1000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : a80.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : a80.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B727 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 : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 6000 flight time type : 1000 |
| ASRS Report | 633359 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne critical non adherence : far non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Miss Distance | horizontal : 500 vertical : 250 |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Ambiguous |
Narrative:
Takeoff clearance: fly 070 degree heading at marker, cleared for takeoff runway 8R atl. After rotation, we were IMC and instructed to contact departure 125.7. Initial heading was 092 degrees until marker. Climbing through 1000 ft AGL, while switching confign and frequencys, we got a TA. We broke out of clouds around 1100 ft AGL and we were turning to assigned heading of 070 degrees. Copilot saw a B727 turning north into us just as we broke out of clouds. Copilot called out the traffic to the captain and told the captain to continue turing left and stop climbing. We started to get an RA, 'monitor vertical speed.' departure controller called us to see if we were on frequency yet. Copilot told him yes and we had the B727 in sight. Departure controller told us we could turn north immediately if necessary. I told him we were already in the turn. The captain stopped his climb at 2100 ft MSL, and asked copilot to keep the B727 in sight. The B727 seemed to be correcting his turn and began turning back towards south (belly up to us). We stayed below and underneath him. We missed him by only a few hundred ft the RA was slow to give proper inputs. Luckily we had just broken out of the WX and saw him visually and leveled off immediately. We began our avoidance maneuver before the RA, but after receiving the TA. After clear of conflict, we asked departure to verify assigned heading and altitude. The captain asked, 'what was that?' the controller responded, 'we are investigating it.' we were instructed 360 degree heading and 10000 ft MSL, 250 KTS.
Original NASA ASRS Text
Title: B737-800 CREW AND A B727 HAD LESS THAN LEGAL SEPARATION IN ATL CLASS B AIRSPACE.
Narrative: TKOF CLRNC: FLY 070 DEG HDG AT MARKER, CLRED FOR TKOF RWY 8R ATL. AFTER ROTATION, WE WERE IMC AND INSTRUCTED TO CONTACT DEP 125.7. INITIAL HDG WAS 092 DEGS UNTIL MARKER. CLBING THROUGH 1000 FT AGL, WHILE SWITCHING CONFIGN AND FREQS, WE GOT A TA. WE BROKE OUT OF CLOUDS AROUND 1100 FT AGL AND WE WERE TURNING TO ASSIGNED HDG OF 070 DEGS. COPLT SAW A B727 TURNING N INTO US JUST AS WE BROKE OUT OF CLOUDS. COPLT CALLED OUT THE TFC TO THE CAPT AND TOLD THE CAPT TO CONTINUE TURING L AND STOP CLBING. WE STARTED TO GET AN RA, 'MONITOR VERT SPD.' DEP CTLR CALLED US TO SEE IF WE WERE ON FREQ YET. COPLT TOLD HIM YES AND WE HAD THE B727 IN SIGHT. DEP CTLR TOLD US WE COULD TURN N IMMEDIATELY IF NECESSARY. I TOLD HIM WE WERE ALREADY IN THE TURN. THE CAPT STOPPED HIS CLB AT 2100 FT MSL, AND ASKED COPLT TO KEEP THE B727 IN SIGHT. THE B727 SEEMED TO BE CORRECTING HIS TURN AND BEGAN TURNING BACK TOWARDS S (BELLY UP TO US). WE STAYED BELOW AND UNDERNEATH HIM. WE MISSED HIM BY ONLY A FEW HUNDRED FT THE RA WAS SLOW TO GIVE PROPER INPUTS. LUCKILY WE HAD JUST BROKEN OUT OF THE WX AND SAW HIM VISUALLY AND LEVELED OFF IMMEDIATELY. WE BEGAN OUR AVOIDANCE MANEUVER BEFORE THE RA, BUT AFTER RECEIVING THE TA. AFTER CLR OF CONFLICT, WE ASKED DEP TO VERIFY ASSIGNED HDG AND ALT. THE CAPT ASKED, 'WHAT WAS THAT?' THE CTLR RESPONDED, 'WE ARE INVESTIGATING IT.' WE WERE INSTRUCTED 360 DEG HDG AND 10000 FT MSL, 250 KTS.
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.