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Flight crew experiences TCASII RA near OM at los angeles as confusion occurs between traffic controllers and pilots.
| Attributes | |
| ACN | 330481 |
| Time | |
| Date | 199603 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 2500 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax tower : lax |
| Operator | common carrier : air carrier |
| Make Model Name | Jetstream 31 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent : approach descent other landing other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | L-1011 Tri-Star All Series |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp pilot : cfi pilot : commercial |
| Experience | flight time last 90 days : 300 flight time total : 3700 flight time type : 900 |
| ASRS Report | 330481 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe conflict : nmac non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 1500 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
| Airport | procedure or policy : unspecified |
Narrative:
In sum: lax was busy, nighttime. L1011 on north downwind was asked if he had traffic at 10 O'clock in sight. L1011 said he did. Socal approach controller said cleared for the visual runway 24L, cross behind that traffic which is for runway 24R. L1011 complied. However, it appears the L1011 was seeing the B737 and did not see the reporter behind in the jetstream. Therefore, the L1011 crossed too close in front of the jetstream he was supposed to cross behind. The L1011 did not see the jetstream. The L1011 ended up going around. The jetstream the L1011 was supposed to pass behind which was the reporter made an evasive maneuver in response to his TCASII RA and visual sighting. The tower did not tell the L1011 to go around. Callback conversation with reporter revealed the following information: the reporter stated he was flying a jetstream 3100. The aircraft that was turning in from the north that passed frightfully close in front was an L1011. And, the aircraft ahead of the reporter for runway 24R was a B737-300. The tower did not tell the L1011 to go around but did clear the reporter to turn off at an intersection associated with the B737 ahead and cleared to cross runway 24L. The reporter at this time was about 3 mi out on final. The tower seemed surprised when the reporter responded they were still 3 mi out. The reporter was concerned that their TCASII aural warning is inaudible. However, the reporter did say the cockpit noise is such in their jetstream 3100 that many pilots wear earplugs along with their headsets and turn up their radio volumes to compensate for the earplugs. Of course, the aural TCASII warning is not ctlable in the cockpit. The reporter stated their jetstream 3100 cockpit noise seems louder than other jetstream models. The analyst mentioned to the reporter there have been complaints from other rptrs operating other aircraft that the TCASII warning is so loud they cannot communicate over the radio.
Original NASA ASRS Text
Title: FLC EXPERIENCES TCASII RA NEAR OM AT LOS ANGELES AS CONFUSION OCCURS BTWN TFC CTLRS AND PLTS.
Narrative: IN SUM: LAX WAS BUSY, NIGHTTIME. L1011 ON N DOWNWIND WAS ASKED IF HE HAD TFC AT 10 O'CLOCK IN SIGHT. L1011 SAID HE DID. SOCAL APCH CTLR SAID CLRED FOR THE VISUAL RWY 24L, CROSS BEHIND THAT TFC WHICH IS FOR RWY 24R. L1011 COMPLIED. HOWEVER, IT APPEARS THE L1011 WAS SEEING THE B737 AND DID NOT SEE THE RPTR BEHIND IN THE JETSTREAM. THEREFORE, THE L1011 CROSSED TOO CLOSE IN FRONT OF THE JETSTREAM HE WAS SUPPOSED TO CROSS BEHIND. THE L1011 DID NOT SEE THE JETSTREAM. THE L1011 ENDED UP GOING AROUND. THE JETSTREAM THE L1011 WAS SUPPOSED TO PASS BEHIND WHICH WAS THE RPTR MADE AN EVASIVE MANEUVER IN RESPONSE TO HIS TCASII RA AND VISUAL SIGHTING. THE TWR DID NOT TELL THE L1011 TO GAR. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED HE WAS FLYING A JETSTREAM 3100. THE ACFT THAT WAS TURNING IN FROM THE N THAT PASSED FRIGHTFULLY CLOSE IN FRONT WAS AN L1011. AND, THE ACFT AHEAD OF THE RPTR FOR RWY 24R WAS A B737-300. THE TWR DID NOT TELL THE L1011 TO GAR BUT DID CLR THE RPTR TO TURN OFF AT AN INTXN ASSOCIATED WITH THE B737 AHEAD AND CLRED TO CROSS RWY 24L. THE RPTR AT THIS TIME WAS ABOUT 3 MI OUT ON FINAL. THE TWR SEEMED SURPRISED WHEN THE RPTR RESPONDED THEY WERE STILL 3 MI OUT. THE RPTR WAS CONCERNED THAT THEIR TCASII AURAL WARNING IS INAUDIBLE. HOWEVER, THE RPTR DID SAY THE COCKPIT NOISE IS SUCH IN THEIR JETSTREAM 3100 THAT MANY PLTS WEAR EARPLUGS ALONG WITH THEIR HEADSETS AND TURN UP THEIR RADIO VOLUMES TO COMPENSATE FOR THE EARPLUGS. OF COURSE, THE AURAL TCASII WARNING IS NOT CTLABLE IN THE COCKPIT. THE RPTR STATED THEIR JETSTREAM 3100 COCKPIT NOISE SEEMS LOUDER THAN OTHER JETSTREAM MODELS. THE ANALYST MENTIONED TO THE RPTR THERE HAVE BEEN COMPLAINTS FROM OTHER RPTRS OPERATING OTHER ACFT THAT THE TCASII WARNING IS SO LOUD THEY CANNOT COMMUNICATE OVER THE RADIO.
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.