Altitude deviation altitude excursion in flight crew response to TCASII RA to climbing traffic.

Attributes
ACN	241117
Time
Date	199305
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : scy
State Reference	TX
Altitude	msl bound lower : 11000 msl bound upper : 11500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : dfw
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : atp pilot : cfi
Experience	flight time last 90 days : 250 flight time total : 10000 flight time type : 4000
ASRS Report	241117
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 controllera
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 1500
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Was advised by ATC of aircraft that would be leveling 1000 ft below our altitude. Due to excessive climb rate of approaching aircraft we received TA alert on our TCASII followed by RA advisory. Advised ATC of response to RA. Climbed aircraft to 11500 ft from 11000 ft then descend back after conflict was gone. No conflicts with other aircraft. Climb was not necessary because aircraft leveled at 10000 ft. TCASII system was responding to parameters exceeded by closure rate of approaching aircraft.

Original NASA ASRS Text

Title: ALTDEV ALT EXCURSION IN FLC RESPONSE TO TCASII RA TO CLBING TFC.

Narrative: WAS ADVISED BY ATC OF ACFT THAT WOULD BE LEVELING 1000 FT BELOW OUR ALT. DUE TO EXCESSIVE CLB RATE OF APCHING ACFT WE RECEIVED TA ALERT ON OUR TCASII FOLLOWED BY RA ADVISORY. ADVISED ATC OF RESPONSE TO RA. CLBED ACFT TO 11500 FT FROM 11000 FT THEN DSND BACK AFTER CONFLICT WAS GONE. NO CONFLICTS WITH OTHER ACFT. CLB WAS NOT NECESSARY BECAUSE ACFT LEVELED AT 10000 FT. TCASII SYS WAS RESPONDING TO PARAMETERS EXCEEDED BY CLOSURE RATE OF APCHING ACFT.

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.