Narrative:

Moderate to heavy traffic on downwind to slc international. Landing to the south. Inbounds from the south. Helio stallion was approved to release parachutists over salt lake municipal at 17000 ft MSL. Municipal is approximately 8 mi south of international. Common practice is for parachute aircraft to report jumpers away and request descent back into class 'B' airspace. The downwind was full which is approximately 4 mi west of municipal airport. Helio (jumper 1) never reported jumpers away or descent. Conflict alert went off as the helio and air carrier X, a B-737, targets merged altitudes as close as 100 ft. Air carrier X received a TCASII RA and took evasive action turning to the right and a slight climb. Helio's rapid descent and disregard for other aircraft was completely unsafe. Parachuting in a busy level 4 class B airspace is not compatible with our operation with the capability of the helio to descend and pilots attitude. Helio was noticed later today descending from 17000 to 8000 ft in 45 seconds. Supplemental information from acn 279656: I had what I would consider a near midair collision with a 737-200 series aircraft. The typical flight profile for the helio includes a climb to 12000 ft AGL over the drop zone (U42) and, after dropping the jumpers, a rapid descent to landing of approximately 5500-6000 FPM. U42 lies beneath the slc class B airspace. Per the LOA between utah sky ranch and slc TRACON, the jump aircraft has a designated squawk code and is in constant contact with slc approach throughout each flight. Approach provides clearance to climb, drop skydivers, and descend through class B airspace while providing traffic advisories. A typical flight takes approximately 20 mins. The incident occurred on the second load of the day. While climbing to jump altitude (approximately 16500 ft) there was a rush of incoming traffic on the frequency. The controller was very busy with other traffic. I managed to get on the frequency and obtain clearance to drop through the class B airspace without any delays. The controller issued the clearance but gave no descent instructions or TA's nor did he give clearance to descend through the class B airspace as they will sometimes do at that point. The jumpers left the airplane and I started to descend while trying to make the 'jumpers away' call to approach. The controller was still in an absolute steady stream of communication with the incoming traffic and I was not able to get on the frequency. As I approached 12000 ft MSL in the descent I realized I was not going to be able to get clearance to descend through the class B airspace before I reached 10000 ft. As I started to pull out of my descent to remain above 10000 ft, I saw the 737 at about my 11 O'clock position and below me. The 737 was on downwind to runway 16R at slc and I was at about his 1 O'clock and about 700 ft above the 737. It was obvious that we would pass very close to each other so I turned about 20 degrees to my right and continued to pull out of my descent. I noticed the jet was also turning to its right when I passed in front of it and went below it.

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Original NASA ASRS Text

Title: ACR X TCASII RA WITH SKYDIVING ACFT EVASIVE ACTION TURN AND CLB.

Narrative: MODERATE TO HVY TFC ON DOWNWIND TO SLC INTL. LNDG TO THE S. INBOUNDS FROM THE S. HELIO STALLION WAS APPROVED TO RELEASE PARACHUTISTS OVER SALT LAKE MUNICIPAL AT 17000 FT MSL. MUNICIPAL IS APPROX 8 MI S OF INTL. COMMON PRACTICE IS FOR PARACHUTE ACFT TO RPT JUMPERS AWAY AND REQUEST DSCNT BACK INTO CLASS 'B' AIRSPACE. THE DOWNWIND WAS FULL WHICH IS APPROX 4 MI W OF MUNICIPAL ARPT. HELIO (JUMPER 1) NEVER RPTED JUMPERS AWAY OR DSCNT. CONFLICT ALERT WENT OFF AS THE HELIO AND ACR X, A B-737, TARGETS MERGED ALTS AS CLOSE AS 100 FT. ACR X RECEIVED A TCASII RA AND TOOK EVASIVE ACTION TURNING TO THE R AND A SLIGHT CLB. HELIO'S RAPID DSCNT AND DISREGARD FOR OTHER ACFT WAS COMPLETELY UNSAFE. PARACHUTING IN A BUSY LEVEL 4 CLASS B AIRSPACE IS NOT COMPATIBLE WITH OUR OP WITH THE CAPABILITY OF THE HELIO TO DSND AND PLTS ATTITUDE. HELIO WAS NOTICED LATER TODAY DSNDING FROM 17000 TO 8000 FT IN 45 SECONDS. SUPPLEMENTAL INFO FROM ACN 279656: I HAD WHAT I WOULD CONSIDER A NMAC WITH A 737-200 SERIES ACFT. THE TYPICAL FLT PROFILE FOR THE HELIO INCLUDES A CLB TO 12000 FT AGL OVER THE DROP ZONE (U42) AND, AFTER DROPPING THE JUMPERS, A RAPID DSCNT TO LNDG OF APPROX 5500-6000 FPM. U42 LIES BENEATH THE SLC CLASS B AIRSPACE. PER THE LOA BTWN UTAH SKY RANCH AND SLC TRACON, THE JUMP ACFT HAS A DESIGNATED SQUAWK CODE AND IS IN CONSTANT CONTACT WITH SLC APCH THROUGHOUT EACH FLT. APCH PROVIDES CLRNC TO CLB, DROP SKYDIVERS, AND DSND THROUGH CLASS B AIRSPACE WHILE PROVIDING TFC ADVISORIES. A TYPICAL FLT TAKES APPROX 20 MINS. THE INCIDENT OCCURRED ON THE SECOND LOAD OF THE DAY. WHILE CLBING TO JUMP ALT (APPROX 16500 FT) THERE WAS A RUSH OF INCOMING TFC ON THE FREQ. THE CTLR WAS VERY BUSY WITH OTHER TFC. I MANAGED TO GET ON THE FREQ AND OBTAIN CLRNC TO DROP THROUGH THE CLASS B AIRSPACE WITHOUT ANY DELAYS. THE CTLR ISSUED THE CLRNC BUT GAVE NO DSCNT INSTRUCTIONS OR TA'S NOR DID HE GIVE CLRNC TO DSND THROUGH THE CLASS B AIRSPACE AS THEY WILL SOMETIMES DO AT THAT POINT. THE JUMPERS LEFT THE AIRPLANE AND I STARTED TO DSND WHILE TRYING TO MAKE THE 'JUMPERS AWAY' CALL TO APCH. THE CTLR WAS STILL IN AN ABSOLUTE STEADY STREAM OF COM WITH THE INCOMING TFC AND I WAS NOT ABLE TO GET ON THE FREQ. AS I APCHED 12000 FT MSL IN THE DSCNT I REALIZED I WAS NOT GOING TO BE ABLE TO GET CLRNC TO DSND THROUGH THE CLASS B AIRSPACE BEFORE I REACHED 10000 FT. AS I STARTED TO PULL OUT OF MY DSCNT TO REMAIN ABOVE 10000 FT, I SAW THE 737 AT ABOUT MY 11 O'CLOCK POS AND BELOW ME. THE 737 WAS ON DOWNWIND TO RWY 16R AT SLC AND I WAS AT ABOUT HIS 1 O'CLOCK AND ABOUT 700 FT ABOVE THE 737. IT WAS OBVIOUS THAT WE WOULD PASS VERY CLOSE TO EACH OTHER SO I TURNED ABOUT 20 DEGS TO MY R AND CONTINUED TO PULL OUT OF MY DSCNT. I NOTICED THE JET WAS ALSO TURNING TO ITS R WHEN I PASSED IN FRONT OF IT AND WENT BELOW IT.

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.