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Flight crew of a B737-400 had a TCASII RA of another aircraft, a B747, below and then at the same time departure controller issued a turn to maintain separation with the B747. The controller first advised that they had exceeded their assigned altitude and then when the rptrs advised that they had been cleared to a higher altitude, the controller apologized for the confusion.
| Attributes | |
| ACN | 397834 |
| Time | |
| Date | 199803 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 9000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other departure sid : sid |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| ASRS Report | 397834 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 12200 flight time type : 4000 |
| ASRS Report | 397099 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 18000 vertical : 900 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
While flying the venture 2 departure out of lax, socal departure gave us a heading of 330 degrees and climb to 13000 ft. (This would climb us through the sadde 6 arrival.) this was not the usual vector but being that it was early sunday morning and the heading was effectively direct oak, which was our next fix, we did not question the vector. Passing 10000 ft, we had a TCASII TA. (At 3 NM 11:30 O'clock position, -900 ft.) we saw an air carrier Y B747 below and to our left. Socal then gave us an immediate right turn to 010 degrees, saying that we had a 9000 ft clearance. We relayed our 13000 ft clearance and 'in the turn with air carrier Y in sight.' socal apologized for the 'confusion' and handed us off to ZLA. While we have some intrinsic trust in the ATC system, this is another example of the 'human factor' and the constant need for vigilance on everyone's part to maintain a safe environment.
Original NASA ASRS Text
Title: FLC OF A B737-400 HAD A TCASII RA OF ANOTHER ACFT, A B747, BELOW AND THEN AT THE SAME TIME DEP CTLR ISSUED A TURN TO MAINTAIN SEPARATION WITH THE B747. THE CTLR FIRST ADVISED THAT THEY HAD EXCEEDED THEIR ASSIGNED ALT AND THEN WHEN THE RPTRS ADVISED THAT THEY HAD BEEN CLRED TO A HIGHER ALT, THE CTLR APOLOGIZED FOR THE CONFUSION.
Narrative: WHILE FLYING THE VENTURE 2 DEP OUT OF LAX, SOCAL DEP GAVE US A HDG OF 330 DEGS AND CLB TO 13000 FT. (THIS WOULD CLB US THROUGH THE SADDE 6 ARR.) THIS WAS NOT THE USUAL VECTOR BUT BEING THAT IT WAS EARLY SUNDAY MORNING AND THE HDG WAS EFFECTIVELY DIRECT OAK, WHICH WAS OUR NEXT FIX, WE DID NOT QUESTION THE VECTOR. PASSING 10000 FT, WE HAD A TCASII TA. (AT 3 NM 11:30 O'CLOCK POS, -900 FT.) WE SAW AN ACR Y B747 BELOW AND TO OUR L. SOCAL THEN GAVE US AN IMMEDIATE R TURN TO 010 DEGS, SAYING THAT WE HAD A 9000 FT CLRNC. WE RELAYED OUR 13000 FT CLRNC AND 'IN THE TURN WITH ACR Y IN SIGHT.' SOCAL APOLOGIZED FOR THE 'CONFUSION' AND HANDED US OFF TO ZLA. WHILE WE HAVE SOME INTRINSIC TRUST IN THE ATC SYS, THIS IS ANOTHER EXAMPLE OF THE 'HUMAN FACTOR' AND THE CONSTANT NEED FOR VIGILANCE ON EVERYONE'S PART TO MAINTAIN A SAFE ENVIRONMENT.
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.