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An air carrier B767 receives a TCASII RA during approach at nighttime into lax. B767 is assigned visual approach to runway 25R while aircraft approaching runway 25L in visual conditions causes the TCASII RA.
| Attributes | |
| ACN | 424067 |
| Time | |
| Date | 199812 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| Altitude | agl bound lower : 600 agl bound upper : 600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | approach : visual arrival star : star |
| Flight Plan | IFR |
| Aircraft 2 | |
| Flight Phase | descent : approach landing other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial |
| ASRS Report | 424067 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 1200 vertical : 400 |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
ATC facility: socal approach. Location: lax 249 degree radial, 8 DME. On approach to lax, socal approach cleared us for a visual approach to runway 25R. The controller advised us of commuter traffic from the south that had us in sight and cleared for a visual approach to runway 25L. He positioned himself less than 1/4 mi behind us and about 400-500 ft above us. This set off a TCASII RA to monitor vertical speed 2000 FPM all the way down, below the GS and VASI, to about 600 ft AGL. This may be legal, but is very distracting at a critical phase of flight. The captain was flying and I (the first officer) could not see the traffic. The first officer of the commuter was the only person that could possibly maintain the visual separation -- less than a couple of hundred ft apart. This nighttime formation flying seems like fun but has no place in air carrier operations.
Original NASA ASRS Text
Title: AN ACR B767 RECEIVES A TCASII RA DURING APCH AT NIGHTTIME INTO LAX. B767 IS ASSIGNED VISUAL APCH TO RWY 25R WHILE ACFT APCHING RWY 25L IN VISUAL CONDITIONS CAUSES THE TCASII RA.
Narrative: ATC FACILITY: SOCAL APCH. LOCATION: LAX 249 DEG RADIAL, 8 DME. ON APCH TO LAX, SOCAL APCH CLRED US FOR A VISUAL APCH TO RWY 25R. THE CTLR ADVISED US OF COMMUTER TFC FROM THE S THAT HAD US IN SIGHT AND CLRED FOR A VISUAL APCH TO RWY 25L. HE POSITIONED HIMSELF LESS THAN 1/4 MI BEHIND US AND ABOUT 400-500 FT ABOVE US. THIS SET OFF A TCASII RA TO MONITOR VERT SPD 2000 FPM ALL THE WAY DOWN, BELOW THE GS AND VASI, TO ABOUT 600 FT AGL. THIS MAY BE LEGAL, BUT IS VERY DISTRACTING AT A CRITICAL PHASE OF FLT. THE CAPT WAS FLYING AND I (THE FO) COULD NOT SEE THE TFC. THE FO OF THE COMMUTER WAS THE ONLY PERSON THAT COULD POSSIBLY MAINTAIN THE VISUAL SEPARATION -- LESS THAN A COUPLE OF HUNDRED FT APART. THIS NIGHTTIME FORMATION FLYING SEEMS LIKE FUN BUT HAS NO PLACE IN ACR OPS.
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.