B737 flight crew departure from ZZZ experienced TCAS RA with aircraft formation in nearby airshow.

Attributes
ACN	706094
Time
Date	200608
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sea.airport
State Reference	WA
Altitude	msl single value : 5000
Environment
Flight Conditions	VMC
Weather Elements	other
Aircraft 1
Controlling Facilities	tracon : s46.tracon
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Aircraft 2
Operator	Other
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
ASRS Report	706094
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 6000 vertical : 400
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

During takeoff we received an RA at about 5000 ft and dove the aircraft from about 5800 ft to about 4800 ft to follow the RA and turned from 340 degrees to 290 degrees. Pitch down was about 5 degrees and bank of about 30 degrees. This was to get out of the way of a group of aircraft that were doing an airshow. The first officer said he saw the aircraft about 400 ft above and about 1 mi. There were no complaints from the passenger or the flight attendants. We were given a turn to 290 degrees from 340 degrees at about the same time as the RA. We told the controller that we were following an RA. After the RA we climbed back to 6000 ft.

Original NASA ASRS Text

Title: B737 FLT CREW DEP FROM ZZZ EXPERIENCED TCAS RA WITH ACFT FORMATION IN NEARBY AIRSHOW.

Narrative: DURING TKOF WE RECEIVED AN RA AT ABOUT 5000 FT AND DOVE THE ACFT FROM ABOUT 5800 FT TO ABOUT 4800 FT TO FOLLOW THE RA AND TURNED FROM 340 DEGS TO 290 DEGS. PITCH DOWN WAS ABOUT 5 DEGS AND BANK OF ABOUT 30 DEGS. THIS WAS TO GET OUT OF THE WAY OF A GROUP OF ACFT THAT WERE DOING AN AIRSHOW. THE FO SAID HE SAW THE ACFT ABOUT 400 FT ABOVE AND ABOUT 1 MI. THERE WERE NO COMPLAINTS FROM THE PAX OR THE FLT ATTENDANTS. WE WERE GIVEN A TURN TO 290 DEGS FROM 340 DEGS AT ABOUT THE SAME TIME AS THE RA. WE TOLD THE CTLR THAT WE WERE FOLLOWING AN RA. AFTER THE RA WE CLBED BACK TO 6000 FT.

Data retrieved from NASA's ASRS site as of January 2009 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.