MD80 flight crew responds to TCASII RA at FL280.

Attributes
ACN	440030
Time
Date	199906
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : lmn.vortac
State Reference	IA
Altitude	msl bound lower : 28000 msl bound upper : 28500
Environment
Light	Night
Aircraft 1
Controlling Facilities	artcc : zmp.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zmp.artcc
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	440030
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
ASRS Report	440029
Events
Anomaly	conflict : airborne critical non adherence : clearance
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took precautionary avoidance action flight crew : returned to original clearance
Supplementary
Problem Areas	Flight Crew Human Performance Airspace Structure ATC Human Performance
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation

Narrative:

TA followed almost immediately by RA for a rapidly climbing aircraft at our 2 O'clock position. Responded to RA per company procedures, with an altitude deviation of 500 ft. No traffic call from ATC. Advised ATC we were deviating from altitude because of RA.

Original NASA ASRS Text

Title: MD80 FLC RESPONDS TO TCASII RA AT FL280.

Narrative: TA FOLLOWED ALMOST IMMEDIATELY BY RA FOR A RAPIDLY CLBING ACFT AT OUR 2 O'CLOCK POS. RESPONDED TO RA PER COMPANY PROCS, WITH AN ALTDEV OF 500 FT. NO TFC CALL FROM ATC. ADVISED ATC WE WERE DEVIATING FROM ALT BECAUSE OF RA.

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.