Air carrier flight crew described a runway 19L departure from sfo in bad weather. During the require...

Attributes
ACN	1415745
Time
Date	201701
Local Time Of Day	1201-1800
Place
Locale Reference	SFO.Airport
State Reference	CA
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Widebody Transport
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Route In Use	SID MOLEN8
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 300 Flight Crew Total 15753 Flight Crew Type 8121
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 250 Flight Crew Total 14469 Flight Crew Type 13223
Events
Anomaly	Inflight Event / Encounter Weather / Turbulence

Narrative:

Due to strong south winds (180@34 gusts to 48) coordinated with dispatch and planned runway 19L departure at sfo. The takeoff was with maximum power and flaps 20 for runway performance reasons. LNAV/VNAV armed-engaged; and used the nadp 1 (ICAO) climb procedure for terrain considerations. There was no convective windshear at or associated with the departure runway on ATIS. Used the LNAV track on the molen 8 SID and started the 90 degree left turn as per charted track guidance or about 400-500 AGL. Encountered moderate turbulence and wind gusts which rolled the aircraft from the established 30 degree bank angle to 40-45 degrees bank angle several times during the turn. Associated warning bank angle sounded. At about 1100 AGL the reactive wind shear system detected a loss of climb performance and sounded; followed procedure with the exception of rolling the wings level in order to continue the turn away from rising terrain. The loss of climb performance resulted in almost no vertical climb for a few seconds and then the windshear alert ended by 1200 AGL. After stabilized in the climb and departure SID heading (track) reported to ATC and satcom call to dispatch.

Original NASA ASRS Text

Title: Air carrier flight crew described a Runway 19L departure from SFO in bad weather. During the required low altitude turn for terrain; moderate turbulence was encountered along with several bank angle warnings and a windshear warning.

Narrative: Due to strong south winds (180@34 gusts to 48) coordinated with dispatch and planned Runway 19L departure at SFO. The takeoff was with maximum power and flaps 20 for runway performance reasons. LNAV/VNAV armed-engaged; and used the NADP 1 (ICAO) climb procedure for terrain considerations. There was no convective windshear at or associated with the departure runway on ATIS. Used the LNAV track on the MOLEN 8 SID and started the 90 degree left turn as per charted track guidance or about 400-500 AGL. Encountered moderate turbulence and wind gusts which rolled the aircraft from the established 30 degree bank angle to 40-45 degrees bank angle several times during the turn. Associated warning BANK ANGLE sounded. At about 1100 AGL the reactive wind shear system detected a loss of climb performance and sounded; followed procedure with the exception of rolling the wings level in order to continue the turn away from rising terrain. The loss of climb performance resulted in almost no vertical climb for a few seconds and then the windshear alert ended by 1200 AGL. After stabilized in the climb and departure SID heading (track) reported to ATC and SATCOM call to dispatch.

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.

Air carrier flight crew described a runway 19L departure from sfo in bad weather. During the required low altitude turn for terrain; moderate turbulence was encountered along with several bank angle warnings and a windshear warning.