B737 received TCASII RA, executes go around during visual side-by operations at hou.

Attributes
ACN	611249
Time
Date	200403
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : hou.airport
State Reference	TX
Altitude	msl single value : 1300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : hou.tower
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : hou.tower
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Experience	flight time last 90 days : 125 flight time total : 700
ASRS Report	611249
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 220 flight time total : 10000 flight time type : 6000
ASRS Report	611176
Events
Anomaly	conflict : airborne less severe non adherence : company policies other anomaly
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : executed go around flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew other
Miss Distance	horizontal : 500 vertical : 400
Supplementary
Problem Areas	Flight Crew Human Performance FAA Company Aircraft
Primary Problem	Flight Crew Human Performance

Narrative:

I was monitoring from the first officer seat and the captain was flying. We were vectored in for a visual approach to runway 12R at hobby. We slowed down, in accordance with tower's directive, from 250 KTS to 210 KTS to 190 KTS then to 150 KTS. At about 2000 ft MSL we received a TCASII TA stating 'traffic.' the captain visually acquired the twin engine aircraft doing a visual to runway 12L. The TCASII showed the aircraft was 500 ft below us and the captain said the aircraft was abeam him in a route position. We continued with the approach with the captain keeping visual on the other aircraft (I could not see it). Then we received a TCASII RA stating 'reduce descent, reduce descent.' the captain followed the RA and temporarily leveled off. This caused us to start getting a little high on GS so we configured to flaps 25 degrees +30. At around 1300 ft MSL we received a TCASII RA stating 'climb, climb.' the captain applied the appropriate procedures and we executed a go around. The captain had visual on the aircraft the whole time, but due to the TCASII RA, we executed the go around and I notified tower of our go around due to the TCASII RA. We were vectored around for another visual to runway 12R and landed. After landing, we were informed to notify the tower. The captain told the tower that we used to be able to maintain visual with a TCASII RA, but now due to company manual are not and must immediately respond to TCASII RA's. At no time were we in actual danger of hitting the other aircraft.

Original NASA ASRS Text

Title: B737 RECEIVED TCASII RA, EXECUTES GAR DURING VISUAL SIDE-BY OPS AT HOU.

Narrative: I WAS MONITORING FROM THE FO SEAT AND THE CAPT WAS FLYING. WE WERE VECTORED IN FOR A VISUAL APCH TO RWY 12R AT HOBBY. WE SLOWED DOWN, IN ACCORDANCE WITH TWR'S DIRECTIVE, FROM 250 KTS TO 210 KTS TO 190 KTS THEN TO 150 KTS. AT ABOUT 2000 FT MSL WE RECEIVED A TCASII TA STATING 'TFC.' THE CAPT VISUALLY ACQUIRED THE TWIN ENG ACFT DOING A VISUAL TO RWY 12L. THE TCASII SHOWED THE ACFT WAS 500 FT BELOW US AND THE CAPT SAID THE ACFT WAS ABEAM HIM IN A RTE POS. WE CONTINUED WITH THE APCH WITH THE CAPT KEEPING VISUAL ON THE OTHER ACFT (I COULD NOT SEE IT). THEN WE RECEIVED A TCASII RA STATING 'REDUCE DSCNT, REDUCE DSCNT.' THE CAPT FOLLOWED THE RA AND TEMPORARILY LEVELED OFF. THIS CAUSED US TO START GETTING A LITTLE HIGH ON GS SO WE CONFIGURED TO FLAPS 25 DEGS +30. AT AROUND 1300 FT MSL WE RECEIVED A TCASII RA STATING 'CLB, CLB.' THE CAPT APPLIED THE APPROPRIATE PROCS AND WE EXECUTED A GAR. THE CAPT HAD VISUAL ON THE ACFT THE WHOLE TIME, BUT DUE TO THE TCASII RA, WE EXECUTED THE GAR AND I NOTIFIED TWR OF OUR GAR DUE TO THE TCASII RA. WE WERE VECTORED AROUND FOR ANOTHER VISUAL TO RWY 12R AND LANDED. AFTER LNDG, WE WERE INFORMED TO NOTIFY THE TWR. THE CAPT TOLD THE TWR THAT WE USED TO BE ABLE TO MAINTAIN VISUAL WITH A TCASII RA, BUT NOW DUE TO COMPANY MANUAL ARE NOT AND MUST IMMEDIATELY RESPOND TO TCASII RA'S. AT NO TIME WERE WE IN ACTUAL DANGER OF HITTING THE OTHER 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.