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B767 first officer reported executing a go-around after receiving a GPWS terrain warning on an RNAV GPS approach to sfo runway 10L.
| Attributes | |
| ACN | 1425401 |
| Time | |
| Date | 201702 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | SFO.Airport |
| State Reference | CA |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Route In Use | Other RNAV GPS Runway 10L |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Total 10000 |
| Events | |
| Anomaly | Inflight Event / Encounter CFTT / CFIT |
Narrative:
Flying the RNAV GPS runway 10L. Stable in LNAV and VNAV path. Passing the FAF; gear down flaps 20; we got a 'terrain terrain pull up' (only once). Started a GPWS recovery and quickly changed to a go around. Lowest GPWS altitude called out was 1000 ft. A ridge line does pass across the FAF landing runway 19. Weather on ATIS was 4000+ so we didn't expect to be in the WX at the FAF. It was 4000+ on the ILS to 19. Tower instructed speed 170 to the FAF. With 20+ kts of headwind I don't see that as a factor.aircraft was on course and on path; my guess is at 20 flaps we are not at a landing flap so the GPWS looks farther out. Add a note to the 10-7 page to be at landing flaps before the ridge line. Runway 10 is rarely used at sfo.
Original NASA ASRS Text
Title: B767 First Officer reported executing a go-around after receiving a GPWS terrain warning on an RNAV GPS approach to SFO Runway 10L.
Narrative: Flying the RNAV GPS Runway 10L. Stable in LNAV and VNAV PATH. Passing the FAF; gear down Flaps 20; we got a 'TERRAIN TERRAIN PULL UP' (only once). Started a GPWS recovery and quickly changed to a go around. Lowest GPWS altitude called out was 1000 ft. A ridge line does pass across the FAF landing Runway 19. Weather on ATIS was 4000+ so we didn't expect to be in the WX at the FAF. It was 4000+ on the ILS to 19. Tower instructed speed 170 to the FAF. With 20+ kts of headwind I don't see that as a factor.Aircraft was on course and on path; my guess is at 20 flaps we are not at a landing flap so the GPWS looks farther out. Add a note to the 10-7 page to be at landing flaps before the ridge line. Runway 10 is rarely used at SFO.
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.