Light transport commuter aircraft is vectored to approach on runway 24L behind a B737 on approach to...

Attributes
ACN	375116
Time
Date	199707
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lax
State Reference	CA
Altitude	msl bound lower : 1000 msl bound upper : 1000
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	tracon : lax tower : lax
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Boeing Company Undifferentiated or Other Model
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time total : 7000
ASRS Report	375116
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Reported WX lax 1000 ft broken, visibility 9 mi, the broken layer was over the airport, but only extended approximately 2 mi to the east of the field. Beyond that the layer ended, yielding to clear skies. I was captain on flight from sbp to lax and the PF. We were on a downwind vector of heading 070 degrees north of lax's north runway complex. An airline B737 was ahead in sequence and on base leg for lax runway 24R, socal called this traffic to us and informed us if we could keep the aircraft in sight we would get a visual to runway 24L. We called the B737 in sight and accepted a visual approach to runway 24L, with the B737 landing runway 24R, with the stipulation that we not pass the aircraft. We kept the B737 in sight at all times and remained in visual conditions at all times. We maneuvered into a position to the south (left) of the B737 and slightly behind their aircraft. Both aircraft were given a frequency change to lax tower north complex. We checked on with lax tower and were cleared to land. The B737 then reported to tower that they had an RA and did not have us in sight. Tower informed them that the aircraft was visual on them to runway 24L. The B737 discussed with tower going around since they did not have us in sight, and I believe they stated they did not have the runway in sight. Due to the fact that they were reacting to the RA and perhaps above the GS their forward visibility may have been impaired. The B737 then reported the runway in sight and informed tower they would not perform a go around. Although we remained in visual conditions and had the B737 in sight at all times, conditions for these types of visuals were becoming marginal. Better communications need to exist between socal and lax tower, including soliciting PIREPS for these operations. I also don't believe the B737 understood from socal that we would be maneuvering in their vicinity.

Original NASA ASRS Text

Title: LTT COMMUTER ACFT IS VECTORED TO APCH ON RWY 24L BEHIND A B737 ON APCH TO RWY 24R. CLRED FOR VISUAL WITH STIPULATION THAT THEY KEEP THE ACFT IN SIGHT AND DO NOT PASS THE B737. THE B737 GETS A TCASII RA.

Narrative: RPTED WX LAX 1000 FT BROKEN, VISIBILITY 9 MI, THE BROKEN LAYER WAS OVER THE ARPT, BUT ONLY EXTENDED APPROX 2 MI TO THE E OF THE FIELD. BEYOND THAT THE LAYER ENDED, YIELDING TO CLR SKIES. I WAS CAPT ON FLT FROM SBP TO LAX AND THE PF. WE WERE ON A DOWNWIND VECTOR OF HDG 070 DEGS N OF LAX'S N RWY COMPLEX. AN AIRLINE B737 WAS AHEAD IN SEQUENCE AND ON BASE LEG FOR LAX RWY 24R, SOCAL CALLED THIS TFC TO US AND INFORMED US IF WE COULD KEEP THE ACFT IN SIGHT WE WOULD GET A VISUAL TO RWY 24L. WE CALLED THE B737 IN SIGHT AND ACCEPTED A VISUAL APCH TO RWY 24L, WITH THE B737 LNDG RWY 24R, WITH THE STIPULATION THAT WE NOT PASS THE ACFT. WE KEPT THE B737 IN SIGHT AT ALL TIMES AND REMAINED IN VISUAL CONDITIONS AT ALL TIMES. WE MANEUVERED INTO A POS TO THE S (L) OF THE B737 AND SLIGHTLY BEHIND THEIR ACFT. BOTH ACFT WERE GIVEN A FREQ CHANGE TO LAX TWR N COMPLEX. WE CHKED ON WITH LAX TWR AND WERE CLRED TO LAND. THE B737 THEN RPTED TO TWR THAT THEY HAD AN RA AND DID NOT HAVE US IN SIGHT. TWR INFORMED THEM THAT THE ACFT WAS VISUAL ON THEM TO RWY 24L. THE B737 DISCUSSED WITH TWR GOING AROUND SINCE THEY DID NOT HAVE US IN SIGHT, AND I BELIEVE THEY STATED THEY DID NOT HAVE THE RWY IN SIGHT. DUE TO THE FACT THAT THEY WERE REACTING TO THE RA AND PERHAPS ABOVE THE GS THEIR FORWARD VISIBILITY MAY HAVE BEEN IMPAIRED. THE B737 THEN RPTED THE RWY IN SIGHT AND INFORMED TWR THEY WOULD NOT PERFORM A GAR. ALTHOUGH WE REMAINED IN VISUAL CONDITIONS AND HAD THE B737 IN SIGHT AT ALL TIMES, CONDITIONS FOR THESE TYPES OF VISUALS WERE BECOMING MARGINAL. BETTER COMS NEED TO EXIST BTWN SOCAL AND LAX TWR, INCLUDING SOLICITING PIREPS FOR THESE OPS. I ALSO DON'T BELIEVE THE B737 UNDERSTOOD FROM SOCAL THAT WE WOULD BE MANEUVERING IN THEIR VICINITY.

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.

Light transport commuter aircraft is vectored to approach on runway 24L behind a B737 on approach to runway 24R. Cleared for visual with stipulation that they keep the aircraft in sight and do not pass the B737. The B737 gets a TCASII RA.