B787 first officer reported an autopilot error led to an unstable approach and landing.

Attributes
ACN	1597014
Time
Date	201811
Local Time Of Day	0601-1200
Place
Locale Reference	SFO.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B787 Dreamliner Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Component
Aircraft Component	Autoflight System
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Total 2736 Flight Crew Type 958
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Speed All Types Deviation - Track / Heading All Types Inflight Event / Encounter CFTT / CFIT Inflight Event / Encounter Unstabilized Approach

Narrative:

Visual approach. Between 3000 ft.-4000 ft.; cleared to intercept localizer on heading 310; at 2;300 cleared visual approach to 28L. Autoflight system failed to capture facility correctly. Following autopilot 'intercept' of course; crew visually recognized the aircraft was well right of facility. Distraction from the course error/correction resulted in aircraft being well above glidepath. PF (pilot flying) aggressively descended towards glidepath which resulted in an over correction. Relief pilot observed 1.5 dots below glidepath on FMC; visually saw 3 red VASI lights and called out '3 red VASI.' aircraft system caution illuminated and announced 'glideslope.' tower verbally called 'glidepath' warning. PF corrected. Aircraft was stable at 500. PF continued to landing without further incident.

Original NASA ASRS Text

Title: B787 First Officer reported an autopilot error led to an unstable approach and landing.

Narrative: Visual Approach. Between 3000 ft.-4000 ft.; cleared to intercept localizer on heading 310; at 2;300 cleared visual approach to 28L. Autoflight system failed to capture FAC correctly. Following autopilot 'intercept' of course; crew visually recognized the aircraft was well right of FAC. Distraction from the course error/correction resulted in aircraft being well above glidepath. PF (Pilot Flying) aggressively descended towards glidepath which resulted in an over correction. Relief Pilot observed 1.5 dots below glidepath on FMC; visually saw 3 red VASI lights and called out '3 red VASI.' Aircraft system Caution illuminated and announced 'Glideslope.' Tower verbally called 'glidepath' warning. PF corrected. Aircraft was stable at 500. PF continued to landing without further incident.

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.