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B757 flight crew has commuter aircraft speed up to fly beside them on parallel runway visual approach. TCASII activates.
| Attributes | |
| ACN | 386666 |
| Time | |
| Date | 199711 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| Altitude | agl bound lower : 0 agl bound upper : 2500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : lax tower : mem |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 15000 flight time type : 3000 |
| ASRS Report | 386666 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action none taken : unable |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 300 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
During ILS runway 25R (visual conditions) to lax we received a 'descend' RA while on final approach. A commuter turboprop behind us was conducting a visual approach to runway 25L and intentionally increased speed so as to assume a 'formation' position at my 8 O'clock position. I complied with the RA and increased my speed 20 KTS, but he also increased speed. We told the tower twice but neither the tower nor the commuter took any action to relieve the RA. During the latter portion of the approach I was able to see the commuter over my shoulder. I spoke to the tower controller later. He said this is a frequent occurrence and gars are common. He indicated, and former commuter company pilots agree, that some commuter pilots intentionally fly 'formation' during parallel approachs regardless of TCASII indications. This aircraft was extremely close to my aircraft and refused to back off. He put me in a difficult position. Lax should initiate and enforce staggered approachs to parallel runways.
Original NASA ASRS Text
Title: B757 FLC HAS COMMUTER ACFT SPD UP TO FLY BESIDE THEM ON PARALLEL RWY VISUAL APCH. TCASII ACTIVATES.
Narrative: DURING ILS RWY 25R (VISUAL CONDITIONS) TO LAX WE RECEIVED A 'DSND' RA WHILE ON FINAL APCH. A COMMUTER TURBOPROP BEHIND US WAS CONDUCTING A VISUAL APCH TO RWY 25L AND INTENTIONALLY INCREASED SPD SO AS TO ASSUME A 'FORMATION' POS AT MY 8 O'CLOCK POS. I COMPLIED WITH THE RA AND INCREASED MY SPD 20 KTS, BUT HE ALSO INCREASED SPD. WE TOLD THE TWR TWICE BUT NEITHER THE TWR NOR THE COMMUTER TOOK ANY ACTION TO RELIEVE THE RA. DURING THE LATTER PORTION OF THE APCH I WAS ABLE TO SEE THE COMMUTER OVER MY SHOULDER. I SPOKE TO THE TWR CTLR LATER. HE SAID THIS IS A FREQUENT OCCURRENCE AND GARS ARE COMMON. HE INDICATED, AND FORMER COMMUTER COMPANY PLTS AGREE, THAT SOME COMMUTER PLTS INTENTIONALLY FLY 'FORMATION' DURING PARALLEL APCHS REGARDLESS OF TCASII INDICATIONS. THIS ACFT WAS EXTREMELY CLOSE TO MY ACFT AND REFUSED TO BACK OFF. HE PUT ME IN A DIFFICULT POS. LAX SHOULD INITIATE AND ENFORCE STAGGERED APCHS TO PARALLEL RWYS.
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.