A commercial fixed wing jet approaching iwa took evasive action to avoid an aerobatic aircraft just ...

Attributes
ACN	1183124
Time
Date	201406
Local Time Of Day	0601-1200
Place
Locale Reference	P50.TRACON
State Reference	AZ
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	Vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Aerobatic
Flight Phase	Initial Approach
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Flight Engineer Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 12000 Flight Crew Type 2925
Person 2
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Conflict Airborne Conflict
Miss Distance	Horizontal 1 Vertical 500

Narrative:

As we approached tylik intersection we were told of traffic at our 11 o'clock maneuvering. We stated that we were looking. I spotted the traffic maneuvering and it was an aerobatic aircraft changing altitude and direction quickly. ATC told us to turn left to a heading 220. We complied. Now traffic was at our 12 o'clock and I told the captain I had the aircraft in sight and recommended he turn right and descend to avoid the traffic. He said he did not see the traffic but I should do what I think is right. I disconnected the autopilot contacted ATC and told them we were turning right to avoid traffic. They agreed and then stated that they had a traffic alert. I maneuvered our aircraft to the right and descended about 500 feet to avoid the other aircraft.aerobatic aircraft maneuver too fast for TCAS to be of any use other than a TA. An RA can change from a climb to a descent so fast that it's beyond the capabilities of our aircraft to change its direction along with TA commands. We experience too many near midairs near iwa involving flights. We should either change our arrival/departure procedures or move the aerobatic aircraft out of the area. There will be a collision at some point. You can't have that many ras in one area without eventually causing loss of life.

Original NASA ASRS Text

Title: A commercial fixed wing jet approaching IWA took evasive action to avoid an aerobatic aircraft just outside the Class D ring. Reporters advised these conflicts are frequent.

Narrative: As we approached TYLIK intersection we were told of traffic at our 11 o'clock maneuvering. We stated that we were looking. I spotted the traffic maneuvering and it was an aerobatic aircraft changing altitude and direction quickly. ATC told us to turn left to a heading 220. We complied. Now traffic was at our 12 o'clock and I told the Captain I had the aircraft in sight and recommended he turn right and descend to avoid the traffic. He said he did not see the traffic but I should do what I think is right. I disconnected the autopilot contacted ATC and told them we were turning right to avoid traffic. They agreed and then stated that they had a traffic alert. I maneuvered our aircraft to the right and descended about 500 feet to avoid the other aircraft.Aerobatic aircraft maneuver too fast for TCAS to be of any use other than a TA. An RA can change from a climb to a descent so fast that it's beyond the capabilities of our aircraft to change its direction along with TA commands. We experience too many near midairs near IWA involving flights. We should either change our arrival/departure procedures or move the aerobatic aircraft out of the area. There will be a collision at some point. You can't have that many RAs in one area without eventually causing loss of life.

Data retrieved from NASA's ASRS site 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.

A commercial fixed wing jet approaching iwa took evasive action to avoid an aerobatic aircraft just outside the class D ring. Reporters advised these conflicts are frequent.