B737 ng captain reported landing beyond the touchdown zone after an unstabilized approach caused by ...

Attributes
ACN	1697470
Time
Date	201910
Place
Locale Reference	LAX.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Next Generation Undifferentiated
Operating Under FAR Part	Part 121
Flight Phase	Final Approach Landing
Route In Use	Visual Approach STAR GOATZ1
Flight Plan	IFR
Aircraft 2
Make Model Name	B747 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach Landing
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 192 Flight Crew Type 514
Events
Anomaly	Deviation - Procedural Published Material / Policy Inflight Event / Encounter Unstabilized Approach Inflight Event / Encounter Wake Vortex Encounter

Narrative:

On the GOATZ1 star into lax we were vectored off arrival prior to sli. A 747 was also approaching sli from south and vectored off just prior sli. We were behind and kept 1;000 feet above the 747 by ATC. After one orbit we were sequenced behind the 747 for the visual 25L with just under 6 miles trail. With a strong tailwind directly lined up with runway; we discussed the threat of wake turbulence and agreed to fly the approach 1/2 to 1 dot high. We briefed that touching down at far end of touchdown zone (and discussed runway was 11;000 feet long) would be best method to maintain above wake with tail wind and eliminate that threat. Even though ATC did slow us down in an attempt to maintain our distance behind the 747 eventually; the 737 approach speed had us close in on the 747. At about 200 feet; we started to catch some wake turbulence and the first officer slowed the descent rate and maintained above the turbulence; which put us higher on final. We were in the flare with the tailwind and floated with power at idle. We touched down just past the touchdown zone.

Original NASA ASRS Text

Title: B737 NG Captain reported landing beyond the touchdown zone after an unstabilized approach caused by deliberately flying above glide slope to minimize wake turbulence from preceding B747.

Narrative: On the GOATZ1 Star into LAX we were vectored off arrival prior to SLI. A 747 was also approaching SLI from south and vectored off just prior SLI. We were behind and kept 1;000 feet above the 747 by ATC. After one orbit we were sequenced behind the 747 for the visual 25L with just under 6 miles trail. With a strong tailwind directly lined up with runway; we discussed the threat of wake turbulence and agreed to fly the approach 1/2 to 1 dot high. We briefed that touching down at far end of touchdown zone (and discussed runway was 11;000 feet long) would be best method to maintain above wake with tail wind and eliminate that threat. Even though ATC did slow us down in an attempt to maintain our distance behind the 747 eventually; the 737 approach speed had us close in on the 747. At about 200 feet; we started to catch some wake turbulence and the First Officer slowed the descent rate and maintained above the turbulence; which put us higher on final. We were in the flare with the tailwind and floated with power at idle. We touched down just past the touchdown zone.

Data retrieved from NASA's ASRS site 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.

B737 ng captain reported landing beyond the touchdown zone after an unstabilized approach caused by deliberately flying above glide slope to minimize wake turbulence from preceding B747.