DC9 crew given descent clearance, received a TCASII climb RA starting down.

Attributes
ACN	500708
Time
Date	200102
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : djb.vortac
State Reference	OH
Altitude	msl bound lower : 28400 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid.artcc tower : msn.tower
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Operating Under FAR Part	Part 121
Flight Phase	cruise : enroute altitude change
Route In Use	enroute airway : j85.airway
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Make Model Name	Commercial Fixed Wing
Flight Plan	IFR
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 : 14000 flight time type : 2000
ASRS Report	500708
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 230 flight time total : 8500 flight time type : 940
ASRS Report	500388
Events
Anomaly	conflict : airborne critical non adherence : required legal separation non adherence : published procedure
Independent Detector	aircraft equipment : tcas
Resolutory Action	flight crew : returned to assigned altitude
Miss Distance	vertical : 600
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

We were given clearance to descend from FL290 to FL270 and also a frequency change. We were talking to control on XXX.X and were given YYY.Y. We rogered the descent to FL270 and the frequency change. Started descent and picked up a TCASII advisory and then a climb resolution. I started climb and noticed 600 ft on TCASII. Went back to FL290 and called center on new frequency. They said we were on wrong frequency and sent us back to old frequency. They said the descent was not for us and apologized for the mistake.

Original NASA ASRS Text

Title: DC9 CREW GIVEN DSCNT CLRNC, RECEIVED A TCASII CLB RA STARTING DOWN.

Narrative: WE WERE GIVEN CLRNC TO DSND FROM FL290 TO FL270 AND ALSO A FREQ CHANGE. WE WERE TALKING TO CTL ON XXX.X AND WERE GIVEN YYY.Y. WE ROGERED THE DSCNT TO FL270 AND THE FREQ CHANGE. STARTED DSCNT AND PICKED UP A TCASII ADVISORY AND THEN A CLB RESOLUTION. I STARTED CLB AND NOTICED 600 FT ON TCASII. WENT BACK TO FL290 AND CALLED CTR ON NEW FREQ. THEY SAID WE WERE ON WRONG FREQ AND SENT US BACK TO OLD FREQ. THEY SAID THE DSCNT WAS NOT FOR US AND APOLOGIZED FOR THE MISTAKE.

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.