Flight crew of a medium large transport climbed above assigned altitude in response to a TCASII RA.

Attributes
ACN	277487
Time
Date	199407
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iah
State Reference	TX
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iah tower : dfw
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Aircraft 2
Make Model Name	PA-28 Cherokee Arrow IV
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 80 flight time total : 12000 flight time type : 700
ASRS Report	277487
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Flight deviated from ATC assigned altitude of 10000 ft at hoagi intersection (houston cugar arrival) due to a TCASII RA to climb. The conflicting aircraft was a cherokee single engine at 9500 ft and climbing in VFR conditions. Houston approach control was not in communication with the light traffic and could not verify the traffic's intentions. We climbed to 11000 ft and advised ATC, and re- descended to 10000 ft. Houston was advised of our TCASII RA and that we were climbing.

Original NASA ASRS Text

Title: FLC OF A MLG CLBED ABOVE ASSIGNED ALT IN RESPONSE TO A TCASII RA.

Narrative: FLT DEVIATED FROM ATC ASSIGNED ALT OF 10000 FT AT HOAGI INTXN (HOUSTON CUGAR ARR) DUE TO A TCASII RA TO CLB. THE CONFLICTING ACFT WAS A CHEROKEE SINGLE ENG AT 9500 FT AND CLBING IN VFR CONDITIONS. HOUSTON APCH CTL WAS NOT IN COM WITH THE LIGHT TFC AND COULD NOT VERIFY THE TFC'S INTENTIONS. WE CLBED TO 11000 FT AND ADVISED ATC, AND RE- DSNDED TO 10000 FT. HOUSTON WAS ADVISED OF OUR TCASII RA AND THAT WE WERE CLBING.

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.