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PIC of air carrier medium large transport leaves FL240 for FL250 when receiving TCASII RA of climbing traffic below them. No loss of separation.
| Attributes | |
| ACN | 363550 |
| Time | |
| Date | 199703 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 24000 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 170 flight time total : 8000 flight time type : 4100 |
| ASRS Report | 363550 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 15000 flight time type : 4500 |
| ASRS Report | 363560 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Miss Distance | horizontal : 30000 vertical : 1500 |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
Level at FL240 in cruise. Received TCASII RA that directed a climb at 2000 FPM. Conflicting traffic was indicating on TCASII at a position of 11 O'clock climbing through FL215. We responded to the RA as directed, resulting in a climb to FL250 before TCASII indicated clear of traffic. We notified ATC of the altitude deviation and descended back to FL240. The traffic was never acquired visually. Supplemental information from acn 363560: other aircraft appeared (on TCASII) to level off at FL230. We notified ATC of our climb and our intention to descend back to FL240, which we did when TCASII indicated we were clear of traffic. ATC only said 'roger' with no traffic information.
Original NASA ASRS Text
Title: PIC OF ACR MLG LEAVES FL240 FOR FL250 WHEN RECEIVING TCASII RA OF CLBING TFC BELOW THEM. NO LOSS OF SEPARATION.
Narrative: LEVEL AT FL240 IN CRUISE. RECEIVED TCASII RA THAT DIRECTED A CLB AT 2000 FPM. CONFLICTING TFC WAS INDICATING ON TCASII AT A POS OF 11 O'CLOCK CLBING THROUGH FL215. WE RESPONDED TO THE RA AS DIRECTED, RESULTING IN A CLB TO FL250 BEFORE TCASII INDICATED CLR OF TFC. WE NOTIFIED ATC OF THE ALTDEV AND DSNDED BACK TO FL240. THE TFC WAS NEVER ACQUIRED VISUALLY. SUPPLEMENTAL INFO FROM ACN 363560: OTHER ACFT APPEARED (ON TCASII) TO LEVEL OFF AT FL230. WE NOTIFIED ATC OF OUR CLB AND OUR INTENTION TO DSND BACK TO FL240, WHICH WE DID WHEN TCASII INDICATED WE WERE CLR OF TFC. ATC ONLY SAID 'ROGER' WITH NO TFC INFO.
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.