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Flight crew of DC9-50 is vectored for left downwind on initial climb and has TCASII activate when cleared to climb. A light twin aircraft has turned and is 200 ft above them.
| Attributes | |
| ACN | 400136 |
| Time | |
| Date | 199804 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : msp |
| State Reference | MN |
| Altitude | msl bound lower : 3300 msl bound upper : 3300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : msp |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 50 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 17000 flight time type : 4000 |
| ASRS Report | 400136 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 1500 vertical : 200 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
On a vectored left downwind departure from runway 30L msp, light twin traffic was pointed out flying sbound at 3500 ft. We were told to level off at 3000 ft (normally we're given 5000 ft initially). Both of us saw the traffic. We were given a heading to 200 degrees which put the twin at our 12:30 O'clock position. We were told that the twin was going to turn left to northeast, but then ATC cleared us to climb. Just as I (PF) added climb power and commenced the climb, the twin abruptly rolled into at least a 60 degree (probably greater) left turn in front and just above us. We did get a TCASII RA. I leveled at 3300 ft and had to turn right (southwest) to pass behind him. Twin was apparently on another tower frequency and did not know of us (per phone call to TRACON later). Twin was doing some photo surveying -- we were told. This was very close to a near miss, in my opinion, because of our speed and closing rate on the twin. TRACON apologized in subsequent phone call. This was too close of a call in class B airspace. ATC did not know the twin was going to turn so abruptly in front of us, but we should not have been given a climb with him in front of and above us.
Original NASA ASRS Text
Title: FLC OF DC9-50 IS VECTORED FOR L DOWNWIND ON INITIAL CLB AND HAS TCASII ACTIVATE WHEN CLRED TO CLB. A LIGHT TWIN ACFT HAS TURNED AND IS 200 FT ABOVE THEM.
Narrative: ON A VECTORED L DOWNWIND DEP FROM RWY 30L MSP, LIGHT TWIN TFC WAS POINTED OUT FLYING SBOUND AT 3500 FT. WE WERE TOLD TO LEVEL OFF AT 3000 FT (NORMALLY WE'RE GIVEN 5000 FT INITIALLY). BOTH OF US SAW THE TFC. WE WERE GIVEN A HDG TO 200 DEGS WHICH PUT THE TWIN AT OUR 12:30 O'CLOCK POS. WE WERE TOLD THAT THE TWIN WAS GOING TO TURN L TO NE, BUT THEN ATC CLRED US TO CLB. JUST AS I (PF) ADDED CLB PWR AND COMMENCED THE CLB, THE TWIN ABRUPTLY ROLLED INTO AT LEAST A 60 DEG (PROBABLY GREATER) L TURN IN FRONT AND JUST ABOVE US. WE DID GET A TCASII RA. I LEVELED AT 3300 FT AND HAD TO TURN R (SW) TO PASS BEHIND HIM. TWIN WAS APPARENTLY ON ANOTHER TWR FREQ AND DID NOT KNOW OF US (PER PHONE CALL TO TRACON LATER). TWIN WAS DOING SOME PHOTO SURVEYING -- WE WERE TOLD. THIS WAS VERY CLOSE TO A NEAR MISS, IN MY OPINION, BECAUSE OF OUR SPD AND CLOSING RATE ON THE TWIN. TRACON APOLOGIZED IN SUBSEQUENT PHONE CALL. THIS WAS TOO CLOSE OF A CALL IN CLASS B AIRSPACE. ATC DID NOT KNOW THE TWIN WAS GOING TO TURN SO ABRUPTLY IN FRONT OF US, BUT WE SHOULD NOT HAVE BEEN GIVEN A CLB WITH HIM IN FRONT OF AND ABOVE US.
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.