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Captain of medium large transport air carrier aircraft responded to a TCASII RA and climbed above assigned altitude until receiving an all clear.
| Attributes | |
| ACN | 209366 |
| Time | |
| Date | 199204 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : djb |
| State Reference | OH |
| Altitude | msl bound lower : 29000 msl bound upper : 29500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob tower : ilg |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 12000 flight time type : 3000 |
| ASRS Report | 209366 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| 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 |
| Miss Distance | vertical : 1500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
ATC advised light transport jet at 1-2 O'clock FL280 as traffic for us (we were at FL290). A min or so later, our TCASII issued a 'climb' aural warning, and I disconnected the autoplt and climbed to 29500 ft while the copilot told center what we were doing. I did notice the red square illuminated on the TCASII, but because the sun was shining directly across the display, I could not read the altitude. At 29500 ft, the TCASII aural warning changed to 'monitor vertical speed.' when we were 'clear of conflict,' I descended back to FL290, asked center if there was any conflict with our climb to 29500 ft (he said 'no'), and continued. I can think of nothing to explain this occurrence, or how to prevent it in the future. Perhaps my TCASII was in error, but because I could not see the light transport jet, I had to climb.
Original NASA ASRS Text
Title: CAPT OF MLG ACR ACFT RESPONDED TO A TCASII RA AND CLBED ABOVE ASSIGNED ALT UNTIL RECEIVING AN ALL CLR.
Narrative: ATC ADVISED LTT JET AT 1-2 O'CLOCK FL280 AS TFC FOR US (WE WERE AT FL290). A MIN OR SO LATER, OUR TCASII ISSUED A 'CLB' AURAL WARNING, AND I DISCONNECTED THE AUTOPLT AND CLBED TO 29500 FT WHILE THE COPLT TOLD CTR WHAT WE WERE DOING. I DID NOTICE THE RED SQUARE ILLUMINATED ON THE TCASII, BUT BECAUSE THE SUN WAS SHINING DIRECTLY ACROSS THE DISPLAY, I COULD NOT READ THE ALT. AT 29500 FT, THE TCASII AURAL WARNING CHANGED TO 'MONITOR VERT SPD.' WHEN WE WERE 'CLR OF CONFLICT,' I DSNDED BACK TO FL290, ASKED CTR IF THERE WAS ANY CONFLICT WITH OUR CLB TO 29500 FT (HE SAID 'NO'), AND CONTINUED. I CAN THINK OF NOTHING TO EXPLAIN THIS OCCURRENCE, OR HOW TO PREVENT IT IN THE FUTURE. PERHAPS MY TCASII WAS IN ERROR, BUT BECAUSE I COULD NOT SEE THE LTT JET, I HAD TO CLB.
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.