TCASII. ATC coordination problem.

Attributes
ACN	305750
Time
Date	199506
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mip
State Reference	PA
Altitude	msl bound lower : 12000 msl bound upper : 12500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : zzz
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute airway : zny
Flight Plan	IFR
Aircraft 2
Operator	general aviation : instructional
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 190 flight time total : 16000 flight time type : 190
ASRS Report	305750
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 9000 flight time type : 150
ASRS Report	305751
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 3000 vertical : 100
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

At 12000 ft we received an RA on TCASII to climb. ATC said aircraft (providing parachute jump service) was at 11800 ft, VFR, and going back to 11500 ft. Then ATC said aircraft was climbing from 11500 ft to 12500 ft. We had an RA the entire time as we expected aircraft to be descending as we climbed. Very surprised to find that aircraft was also climbing, thereby negating the RA. We climbed from 12000 ft to 12500 ft, then back to comply.

Original NASA ASRS Text

Title: TCASII. ATC COORD PROB.

Narrative: AT 12000 FT WE RECEIVED AN RA ON TCASII TO CLB. ATC SAID ACFT (PROVIDING PARACHUTE JUMP SVC) WAS AT 11800 FT, VFR, AND GOING BACK TO 11500 FT. THEN ATC SAID ACFT WAS CLBING FROM 11500 FT TO 12500 FT. WE HAD AN RA THE ENTIRE TIME AS WE EXPECTED ACFT TO BE DSNDING AS WE CLBED. VERY SURPRISED TO FIND THAT ACFT WAS ALSO CLBING, THEREBY NEGATING THE RA. WE CLBED FROM 12000 FT TO 12500 FT, THEN BACK TO COMPLY.

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.