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Flight crew of a B757 fails to respond to a TCASII RA. They identify another aircraft but it's the wrong one for the TCASII RA.
| Attributes | |
| ACN | 357450 |
| Time | |
| Date | 199612 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 10000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent other |
| Route In Use | enroute : on vectors |
| 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 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 13500 flight time type : 125 |
| ASRS Report | 357450 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Another 'heads up' regarding TCASII. At the TCASII 'caution' we idented 'alert' aircraft as an aircraft that was climbing out of lax towards us. At 'red alert' we reconfirmed aircraft climbing and did not commence our cleared descent from 10000 ft to 8000 ft. However, we did not 'climb' as TCASII requested because we were in VFR and thought we had visual contact. We misidented the TCASII aircraft and the other, real TCASII aircraft went off our left wing doing 250 KTS about 1 NM away passing through our altitude! He was under departure control, and we were on approach control. Neither one advised the other. In my opinion, any time TCASII alerts come into play lax (socal) needs to reevaluate their departure/arrival 'game plans.' callback conversation with reporter revealed the following information: reporter was concerned that aircraft came so close to him. There was only 1 mi separation. He did receive a TCASII RA but interpreted the TCASII RA to an aircraft flying nearby. Since they had a visual on what they thought was the RA aircraft, they took no evasive action. Shortly thereafter, the TCASII RA aircraft came into view and startled the captain. Because the aircraft came so close, 6000 ft, horizontally, the reporter feels that ATC procedures need to be reevaluated. Captain now resolves to always follow the TCASII RA commands.
Original NASA ASRS Text
Title: FLC OF A B757 FAILS TO RESPOND TO A TCASII RA. THEY IDENT ANOTHER ACFT BUT IT'S THE WRONG ONE FOR THE TCASII RA.
Narrative: ANOTHER 'HEADS UP' REGARDING TCASII. AT THE TCASII 'CAUTION' WE IDENTED 'ALERT' ACFT AS AN ACFT THAT WAS CLBING OUT OF LAX TOWARDS US. AT 'RED ALERT' WE RECONFIRMED ACFT CLBING AND DID NOT COMMENCE OUR CLRED DSCNT FROM 10000 FT TO 8000 FT. HOWEVER, WE DID NOT 'CLB' AS TCASII REQUESTED BECAUSE WE WERE IN VFR AND THOUGHT WE HAD VISUAL CONTACT. WE MISIDENTED THE TCASII ACFT AND THE OTHER, REAL TCASII ACFT WENT OFF OUR L WING DOING 250 KTS ABOUT 1 NM AWAY PASSING THROUGH OUR ALT! HE WAS UNDER DEP CTL, AND WE WERE ON APCH CTL. NEITHER ONE ADVISED THE OTHER. IN MY OPINION, ANY TIME TCASII ALERTS COME INTO PLAY LAX (SOCAL) NEEDS TO REEVALUATE THEIR DEP/ARR 'GAME PLANS.' CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR WAS CONCERNED THAT ACFT CAME SO CLOSE TO HIM. THERE WAS ONLY 1 MI SEPARATION. HE DID RECEIVE A TCASII RA BUT INTERPRETED THE TCASII RA TO AN ACFT FLYING NEARBY. SINCE THEY HAD A VISUAL ON WHAT THEY THOUGHT WAS THE RA ACFT, THEY TOOK NO EVASIVE ACTION. SHORTLY THEREAFTER, THE TCASII RA ACFT CAME INTO VIEW AND STARTLED THE CAPT. BECAUSE THE ACFT CAME SO CLOSE, 6000 FT, HORIZLY, THE RPTR FEELS THAT ATC PROCS NEED TO BE REEVALUATED. CAPT NOW RESOLVES TO ALWAYS FOLLOW THE TCASII RA COMMANDS.
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.