Flight crew of a widebody transport climbed in response to a TCASII RA during high altitude cruise.

Attributes
ACN	323300
Time
Date	199512
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pie
State Reference	FL
Altitude	msl bound lower : 27000 msl bound upper : 27700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx tower : muc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	other other : other pilot : instrument pilot : flight engineer pilot : atp pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 17000 flight time type : 1800
ASRS Report	323300
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	unspecified : 3000 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

At above position, altitude and time (XX18Z) we got a TCASII yellow TA display approximately 3-4 mi at our 12 O'clock position 1000 ft below climbing, followed immediately by an RA 700 ft climbing, 600 ft, 400 ft. TCASII ordered 'climb, climb' showed greater than 1500 FPM climb rate. Took aircraft off autoplt, climbed at approximately rate of 2000 FPM. On seeing RA was resolved with traffic passing slightly right below us. Called center told of altitude excursion due to RA on TCASII. He advised it was an aircraft having transponder problems. We had heard center query an aircraft with an experimental number call sign, mins before our TCASII alert, about him showing 300 ft high. We did not see the aircraft visually. We climbed to approximately 27700 ft during RA maneuver, then returned to FL270.

Original NASA ASRS Text

Title: FLC OF A WDB CLBED IN RESPONSE TO A TCASII RA DURING HIGH ALT CRUISE.

Narrative: AT ABOVE POS, ALT AND TIME (XX18Z) WE GOT A TCASII YELLOW TA DISPLAY APPROX 3-4 MI AT OUR 12 O'CLOCK POS 1000 FT BELOW CLBING, FOLLOWED IMMEDIATELY BY AN RA 700 FT CLBING, 600 FT, 400 FT. TCASII ORDERED 'CLB, CLB' SHOWED GREATER THAN 1500 FPM CLB RATE. TOOK ACFT OFF AUTOPLT, CLBED AT APPROX RATE OF 2000 FPM. ON SEEING RA WAS RESOLVED WITH TFC PASSING SLIGHTLY RIGHT BELOW US. CALLED CTR TOLD OF ALT EXCURSION DUE TO RA ON TCASII. HE ADVISED IT WAS AN ACFT HAVING XPONDER PROBS. WE HAD HEARD CTR QUERY AN ACFT WITH AN EXPERIMENTAL NUMBER CALL SIGN, MINS BEFORE OUR TCASII ALERT, ABOUT HIM SHOWING 300 FT HIGH. WE DID NOT SEE THE ACFT VISUALLY. WE CLBED TO APPROX 27700 FT DURING RA MANEUVER, THEN RETURNED TO FL270.

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.