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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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An air carrier medium large transport climbing to 10000 ft saw a military mlt at 12:30 O'clock position and at same altitude at approximately one half mi. The medium large transport slowed his speed and passed clear of the traffic and ATC descended the medium large transport to 9000 ft. Medium large transport flight crew then noticed that the TCASII had failed and reset the circuit breaker and it worked after that. TCASII non operational.
| Attributes | |
| ACN | 368408 |
| Time | |
| Date | 199705 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : cos |
| State Reference | CO |
| Altitude | msl bound lower : 9800 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : cos |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Military Transport |
| Operating Under FAR Part | other : other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 11800 flight time type : 1200 |
| ASRS Report | 368408 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action flight crew : overcame equipment problem |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Our original clearance was to maintain 10000 ft. At takeoff the clearance was changed to 9000 ft. We had requested an immediate turn so that we would be south of some small buildups after completing the turn. We were given a turn 'heading 080 degrees, maintain 10000 ft,' which was a vector to head towards the cos 107 degree radial, 44 DME fix. I was leveling at 9000 ft when my first officer took the call. He dialed in the heading and altitude on the MCP, just as I was leveling at 9000 ft. I proceeded to climb to 10000 ft, hand flying. A company check airman called traffic ahead. I looked up. I was at 9800 ft leveling off for 10000 ft. There was a military heavy at 12:30 O'clock position and 10000 ft. I pulled the power back to slow, but took no evasive action as we would pass behind the aircraft. ATC asked us to descend to 9000 ft. I eased the nose over and descended to 9000 ft. Estimated distance between aircraft 1/2 mi. We discovered our TCASII had failed, recycled the circuit breaker and it came on.
Original NASA ASRS Text
Title: AN ACR MLG CLBING TO 10000 FT SAW A MIL MLT AT 12:30 O'CLOCK POS AND AT SAME ALT AT APPROX ONE HALF MI. THE MLG SLOWED HIS SPD AND PASSED CLR OF THE TFC AND ATC DSNDED THE MLG TO 9000 FT. MLG FLC THEN NOTICED THAT THE TCASII HAD FAILED AND RESET THE CIRCUIT BREAKER AND IT WORKED AFTER THAT. TCASII NON OPERATIONAL.
Narrative: OUR ORIGINAL CLRNC WAS TO MAINTAIN 10000 FT. AT TKOF THE CLRNC WAS CHANGED TO 9000 FT. WE HAD REQUESTED AN IMMEDIATE TURN SO THAT WE WOULD BE S OF SOME SMALL BUILDUPS AFTER COMPLETING THE TURN. WE WERE GIVEN A TURN 'HDG 080 DEGS, MAINTAIN 10000 FT,' WHICH WAS A VECTOR TO HEAD TOWARDS THE COS 107 DEG RADIAL, 44 DME FIX. I WAS LEVELING AT 9000 FT WHEN MY FO TOOK THE CALL. HE DIALED IN THE HDG AND ALT ON THE MCP, JUST AS I WAS LEVELING AT 9000 FT. I PROCEEDED TO CLB TO 10000 FT, HAND FLYING. A COMPANY CHK AIRMAN CALLED TFC AHEAD. I LOOKED UP. I WAS AT 9800 FT LEVELING OFF FOR 10000 FT. THERE WAS A MIL HVY AT 12:30 O'CLOCK POS AND 10000 FT. I PULLED THE PWR BACK TO SLOW, BUT TOOK NO EVASIVE ACTION AS WE WOULD PASS BEHIND THE ACFT. ATC ASKED US TO DSND TO 9000 FT. I EASED THE NOSE OVER AND DSNDED TO 9000 FT. ESTIMATED DISTANCE BTWN ACFT 1/2 MI. WE DISCOVERED OUR TCASII HAD FAILED, RECYCLED THE CIRCUIT BREAKER AND IT CAME ON.
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.