TCASII RA on errant other air carrier flight during a non adherence to ATC clearance.

Attributes
ACN	303766
Time
Date	199505
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : fzt
State Reference	TX
Altitude	msl bound lower : 22600 msl bound upper : 23000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
ASRS Report	303766
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	303656
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action other
Consequence	Other
Miss Distance	vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

In sum: coming from san, we were cleared to paige to hold at FL220. Descending below FL240, ZFW asked a flight if he was descending. He replied that he was. Center told us to level off at FL230, which we did. Immediately after leveling at FL230, we received a TCASII advisory followed quickly by a TCASII RA advising us to descend. I was flying, so I disconnected the autoplt and began a descent. The TCASII indicated an aircraft at about 11 O'clock, at FL230, inside 5 mi. The captain spotted the aircraft visually and took control of our aircraft and turned to the right as well as descending. The plane passed on our left at an unknown distance. We descended to about FL226 during the RA and climbed back to our cleared altitude of FL230 after clear of traffic. No further comment from ZFW. Supplemental information from acn 303656: needless to say ATC was also in the middle of this asking other air carrier what altitude he was at and where he was going.

Original NASA ASRS Text

Title: TCASII RA ON ERRANT OTHER ACR FLT DURING A NON ADHERENCE TO ATC CLRNC.

Narrative: IN SUM: COMING FROM SAN, WE WERE CLRED TO PAIGE TO HOLD AT FL220. DSNDING BELOW FL240, ZFW ASKED A FLT IF HE WAS DSNDING. HE REPLIED THAT HE WAS. CTR TOLD US TO LEVEL OFF AT FL230, WHICH WE DID. IMMEDIATELY AFTER LEVELING AT FL230, WE RECEIVED A TCASII ADVISORY FOLLOWED QUICKLY BY A TCASII RA ADVISING US TO DSND. I WAS FLYING, SO I DISCONNECTED THE AUTOPLT AND BEGAN A DSCNT. THE TCASII INDICATED AN ACFT AT ABOUT 11 O'CLOCK, AT FL230, INSIDE 5 MI. THE CAPT SPOTTED THE ACFT VISUALLY AND TOOK CTL OF OUR ACFT AND TURNED TO THE R AS WELL AS DSNDING. THE PLANE PASSED ON OUR L AT AN UNKNOWN DISTANCE. WE DSNDED TO ABOUT FL226 DURING THE RA AND CLBED BACK TO OUR CLRED ALT OF FL230 AFTER CLR OF TFC. NO FURTHER COMMENT FROM ZFW. SUPPLEMENTAL INFO FROM ACN 303656: NEEDLESS TO SAY ATC WAS ALSO IN THE MIDDLE OF THIS ASKING OTHER ACR WHAT ALT HE WAS AT AND WHERE HE WAS GOING.

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.