Air carrier flight crew deviated from climb to respond to TCASII RA. Altitude deviation excursion.

Attributes
ACN	205216
Time
Date	199203
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iah
State Reference	TX
Altitude	msl bound lower : 2000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iah tower : ord
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
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 : 10500 flight time type : 400
ASRS Report	205216
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 : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Flight #X departed runway 32 at iah at xz and was issued clearance to fly heading 040 degree after departure and climb to 4000 ft MSL. Passing approximately 2000 ft we received a clearance to turn to 140 degree and were advised of traffic. Passing approximately 3000 ft in the turn we received a TCASII RA to descend now at approximately 2000 FPM. The command was followed. When we cleared the conflict we almost immediately received a 2ND TCASII RA and were commanded to climb. We climbed away from the conflict and leveled momentarily to switch frequency to departure and verify our position relative to any other traffic. After switching to frequency 119.7, as issued on our pre-departure clearance, the departure controller seemed confused as to our position and asked for our location which we appropriately responded to. At this time we received a 3RD TCASII RA. However captain had visual at this time and we climbed away from conflict. Flight continued on to tpa without further incident.

Original NASA ASRS Text

Title: ACR FLC DEVIATED FROM CLB TO RESPOND TO TCASII RA. ALTDEV EXCURSION.

Narrative: FLT #X DEPARTED RWY 32 AT IAH AT XZ AND WAS ISSUED CLRNC TO FLY HDG 040 DEG AFTER DEP AND CLB TO 4000 FT MSL. PASSING APPROX 2000 FT WE RECEIVED A CLRNC TO TURN TO 140 DEG AND WERE ADVISED OF TFC. PASSING APPROX 3000 FT IN THE TURN WE RECEIVED A TCASII RA TO DSND NOW AT APPROX 2000 FPM. THE COMMAND WAS FOLLOWED. WHEN WE CLRED THE CONFLICT WE ALMOST IMMEDIATELY RECEIVED A 2ND TCASII RA AND WERE COMMANDED TO CLB. WE CLBED AWAY FROM THE CONFLICT AND LEVELED MOMENTARILY TO SWITCH FREQ TO DEP AND VERIFY OUR POS RELATIVE TO ANY OTHER TFC. AFTER SWITCHING TO FREQ 119.7, AS ISSUED ON OUR PRE-DEP CLRNC, THE DEP CTLR SEEMED CONFUSED AS TO OUR POS AND ASKED FOR OUR LOCATION WHICH WE APPROPRIATELY RESPONDED TO. AT THIS TIME WE RECEIVED A 3RD TCASII RA. HOWEVER CAPT HAD VISUAL AT THIS TIME AND WE CLBED AWAY FROM CONFLICT. FLT CONTINUED ON TO TPA WITHOUT FURTHER INCIDENT.

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.