TCASII gave pilot 2 RA on climb that neither pilot nor controller could verify existed.

Attributes
ACN	281570
Time
Date	199408
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : phx
State Reference	AZ
Altitude	msl bound lower : 13000 msl bound upper : 15000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other enroute airway : phx
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 17000 flight time type : 100
ASRS Report	281570
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

On climb out of phx the TCASII issued a TA then a RA. I followed the RA and went from 2000 FPM climb to a 2000 FPM descent. I had been cleared to 15000 ft by phx departure and was on a 060 degree heading that was also issued by departure. I received the TA at about 12500 ft in my climb and the RA command to descend at about 13000 ft. The unknown traffic appeared to be at 14000 ft. I had descended to about 12500 ft when the TCASII issued a 'clear of conflict' message. Neither the first officer nor I saw the traffic and after calling departure control they said they were not aware of the traffic.

Original NASA ASRS Text

Title: TCASII GAVE PLT 2 RA ON CLB THAT NEITHER PLT NOR CTLR COULD VERIFY EXISTED.

Narrative: ON CLB OUT OF PHX THE TCASII ISSUED A TA THEN A RA. I FOLLOWED THE RA AND WENT FROM 2000 FPM CLB TO A 2000 FPM DSCNT. I HAD BEEN CLRED TO 15000 FT BY PHX DEP AND WAS ON A 060 DEG HDG THAT WAS ALSO ISSUED BY DEP. I RECEIVED THE TA AT ABOUT 12500 FT IN MY CLB AND THE RA COMMAND TO DSND AT ABOUT 13000 FT. THE UNKNOWN TFC APPEARED TO BE AT 14000 FT. I HAD DSNDED TO ABOUT 12500 FT WHEN THE TCASII ISSUED A 'CLR OF CONFLICT' MESSAGE. NEITHER THE FO NOR I SAW THE TFC AND AFTER CALLING DEP CTL THEY SAID THEY WERE NOT AWARE OF THE TFC.

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.