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SF34 flight crew initiate evasive maneuver due to TCASII RA. Sct did not observe target, and flight crew would not respond to sct query to advise where RA aircraft went.
| Attributes | |
| ACN | 459485 |
| Time | |
| Date | 200001 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : lhs.vor |
| State Reference | CA |
| Altitude | msl bound lower : 7800 msl bound upper : 8500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | descent : approach |
| Route In Use | arrival star : kimmo |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | general aviation : personal |
| Make Model Name | Cardinal 177/177RG |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : enroute altitude change |
| Route In Use | enroute airway : v459.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | pilot : private pilot : instrument |
| Experience | controller radar : 12 flight time total : 400 |
| ASRS Report | 459485 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe other anomaly other |
| Independent Detector | atc equipment other atc equipment : radar aircraft equipment : tcas other controllera other flight crewa |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : took evasive action |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
The T/SF34/a was going to lax on the kimmo arrival. The saab was descended to 7000 ft and had traffic (the cardinal) above at 9000 ft. As the saab left 7500 ft, I descended the cardinal to 8000 ft using the 'vacated altitude' rule. ZLA then called regarding a 9000 ft IFR aircraft they could not hand off. While coordinating with the center, the saab reported he was responding to a TCASII RA, that there was someone there with them at matched speeds. The saab was climbing through 7500 ft when I climbed the cardinal back to 9000 ft (he was descending through 8800 ft). I issued traffic to the saab who had the cardinal in sight. The saab got to 7800 ft then started to descend. We lost radio contact with the saab for about 1 min. The pilots did not respond to repeated control instructions. During this entire episode, neither I nor the adjacent controller observed any target near the saab except for the cardinal. When asked where the traffic went, the pilot did not respond.
Original NASA ASRS Text
Title: SF34 FLC INITIATE EVASIVE MANEUVER DUE TO TCASII RA. SCT DID NOT OBSERVE TARGET, AND FLC WOULD NOT RESPOND TO SCT QUERY TO ADVISE WHERE RA ACFT WENT.
Narrative: THE T/SF34/A WAS GOING TO LAX ON THE KIMMO ARR. THE SAAB WAS DSNDED TO 7000 FT AND HAD TFC (THE CARDINAL) ABOVE AT 9000 FT. AS THE SAAB LEFT 7500 FT, I DSNDED THE CARDINAL TO 8000 FT USING THE 'VACATED ALT' RULE. ZLA THEN CALLED REGARDING A 9000 FT IFR ACFT THEY COULD NOT HAND OFF. WHILE COORDINATING WITH THE CTR, THE SAAB RPTED HE WAS RESPONDING TO A TCASII RA, THAT THERE WAS SOMEONE THERE WITH THEM AT MATCHED SPDS. THE SAAB WAS CLBING THROUGH 7500 FT WHEN I CLBED THE CARDINAL BACK TO 9000 FT (HE WAS DSNDING THROUGH 8800 FT). I ISSUED TFC TO THE SAAB WHO HAD THE CARDINAL IN SIGHT. THE SAAB GOT TO 7800 FT THEN STARTED TO DSND. WE LOST RADIO CONTACT WITH THE SAAB FOR ABOUT 1 MIN. THE PLTS DID NOT RESPOND TO REPEATED CTL INSTRUCTIONS. DURING THIS ENTIRE EPISODE, NEITHER I NOR THE ADJACENT CTLR OBSERVED ANY TARGET NEAR THE SAAB EXCEPT FOR THE CARDINAL. WHEN ASKED WHERE THE TFC WENT, THE PLT DID NOT RESPOND.
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.