Air carrier flight climbs in response to TCASII RA on VFR traffic.

Attributes
ACN	259728
Time
Date	199312
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : rdu
State Reference	NC
Altitude	msl bound lower : 15500 msl bound upper : 16700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute airway : zdc
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Military Transport
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 2 controller radar : 12
ASRS Report	259728
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : unable
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 12000 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier X at FL160 wbound out of rdu had an RA with mlt Y at VFR 15500 ft. Air carrier X climbed to 16700 ft. No conflict. No other traffic. The 2 aircraft were already separated but pilot said TCASII doesn't like anything less than 1000 ft. A dangerous move for no apparent reason!

Original NASA ASRS Text

Title: ACR FLT CLBS IN RESPONSE TO TCASII RA ON VFR TFC.

Narrative: ACR X AT FL160 WBOUND OUT OF RDU HAD AN RA WITH MLT Y AT VFR 15500 FT. ACR X CLBED TO 16700 FT. NO CONFLICT. NO OTHER TFC. THE 2 ACFT WERE ALREADY SEPARATED BUT PLT SAID TCASII DOESN'T LIKE ANYTHING LESS THAN 1000 FT. A DANGEROUS MOVE FOR NO APPARENT REASON!

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.