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Medium large transport crew followed TCASII RA guidance in a less than legal separation from a military DC9.
| Attributes | |
| ACN | 421772 |
| Time | |
| Date | 199811 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : lax |
| State Reference | CA |
| Altitude | msl bound lower : 29000 msl bound upper : 29600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | DC-9 30 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer |
| Experience | flight time last 90 days : 210 flight time total : 12000 flight time type : 560 |
| ASRS Report | 421772 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 0 vertical : 600 |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
At FL290 a TCASII RA was given to climb due to approaching aircraft (military DC9). The TCASII showed the aircraft at our 11:30 position, climbing towards us at 600 ft below our aircraft. We climbed to FL296 before the RA was complete and notified ZLA. After talking with ZLA on the ground, we found out the military aircraft was showing 200-300 ft high in all sectors. They told ATC they would have their avionics checked on the ground.
Original NASA ASRS Text
Title: MLG CREW FOLLOWED TCASII RA GUIDANCE IN A LESS THAN LEGAL SEPARATION FROM A MIL DC9.
Narrative: AT FL290 A TCASII RA WAS GIVEN TO CLB DUE TO APCHING ACFT (MIL DC9). THE TCASII SHOWED THE ACFT AT OUR 11:30 POS, CLBING TOWARDS US AT 600 FT BELOW OUR ACFT. WE CLBED TO FL296 BEFORE THE RA WAS COMPLETE AND NOTIFIED ZLA. AFTER TALKING WITH ZLA ON THE GND, WE FOUND OUT THE MIL ACFT WAS SHOWING 200-300 FT HIGH IN ALL SECTORS. THEY TOLD ATC THEY WOULD HAVE THEIR AVIONICS CHKED ON THE GND.
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.