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Captain of air carrier medium large transport aircraft deviated from assigned altitude in response to a TCASII RA.
| Attributes | |
| ACN | 215017 |
| Time | |
| Date | 199207 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : 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 |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other descent other |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | climbout : intermediate altitude |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : instrument pilot : flight engineer pilot : commercial |
| Experience | flight time last 90 days : 100 flight time total : 10000 flight time type : 100 |
| ASRS Report | 215017 |
| 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 |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 1500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On the gland arrival, approximately 38 DME -- 250 KTS and 10000 ft, we got a TA approximately 7 mi in front of us. Traffic appeared to be in level flight. At 50 DME we got an RA on our TCASII to climb. At the same time, ATC was advising us of traffic at approximately 12 O'clock and 5 mi. At 9500 ft, we advised ATC that we were climbing and that the traffic was climbing. Visual contact was at 12 O'clock and 1 military we stopped our climb at 11000 ft. Traffic passed directly under our nose, at approximately 1500 ft below us. If traffic was level we don't believe we would have received an RA. I believe that the traffic was probably lower than 9500 ft (9450 ft) and started a slight climb, causing the RA.
Original NASA ASRS Text
Title: CAPT OF ACR MLG ACFT DEVIATED FROM ASSIGNED ALT IN RESPONSE TO A TCASII RA.
Narrative: ON THE GLAND ARR, APPROX 38 DME -- 250 KTS AND 10000 FT, WE GOT A TA APPROX 7 MI IN FRONT OF US. TFC APPEARED TO BE IN LEVEL FLT. AT 50 DME WE GOT AN RA ON OUR TCASII TO CLB. AT THE SAME TIME, ATC WAS ADVISING US OF TFC AT APPROX 12 O'CLOCK AND 5 MI. AT 9500 FT, WE ADVISED ATC THAT WE WERE CLBING AND THAT THE TFC WAS CLBING. VISUAL CONTACT WAS AT 12 O'CLOCK AND 1 MIL WE STOPPED OUR CLB AT 11000 FT. TFC PASSED DIRECTLY UNDER OUR NOSE, AT APPROX 1500 FT BELOW US. IF TFC WAS LEVEL WE DON'T BELIEVE WE WOULD HAVE RECEIVED AN RA. I BELIEVE THAT THE TFC WAS PROBABLY LOWER THAN 9500 FT (9450 FT) AND STARTED A SLIGHT CLB, CAUSING THE RA.
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.