Narrative:

Following pushback from our gate in singapore we were given taxi instructions 'taxi R1; ep; hold short P5.' we all searched for P5 on the 10-9 and 10-9B charts (jeppesen) but could not find it. The aircraft moving map matched the 10-9/10-9B charts. We queried ATC and they indicated taxiways were renamed and P5 was the old A4. After sorting out the confusion; we taxied straight out and turned onto ep. ATC informed us we actually taxied out on R2 instead of R1 (which also was not on the 10-9 chart since it was labeled B2 on the existing 10-9 and 10-9B charts). We verified that each of us had current updated jeppesen publications. I noted the NOTAM indicating re-designation of taxiways was complete and assumed that since we had current charts; we had the current taxiway labels. After consulting with dispatch and [chief pilot]; it was pointed out that page 10-8A/10-8B discussed further this taxiway change and indicated the new labels. None of the crew noticed this page. I recommend an operations alert be issued for something like this. The NOTAM seemed straight forward but unless you also noticed page 10-8A/10-8B; the NOTAM could easily be misunderstood to mean our current pubs we updated with 10-9/10-9B showing the correct information. Had an operations alert been issued; I feel it is very unlikely we or any crew would make this mistake.

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Original NASA ASRS Text

Title: Air carrier First Officer reported the crew did not notice taxiway designator revisions in the Jeppesen charts causing confusion and a taxiway incursion.

Narrative: Following pushback from our gate in Singapore we were given taxi instructions 'taxi R1; EP; hold short P5.' We all searched for P5 on the 10-9 and 10-9B charts (Jeppesen) but could not find it. The aircraft moving map matched the 10-9/10-9B charts. We queried ATC and they indicated taxiways were renamed and P5 was the old A4. After sorting out the confusion; we taxied straight out and turned onto EP. ATC informed us we actually taxied out on R2 instead of R1 (which also was not on the 10-9 chart since it was labeled B2 on the existing 10-9 and 10-9B charts). We verified that each of us had current updated Jeppesen publications. I noted the NOTAM indicating re-designation of taxiways was complete and assumed that since we had current charts; we had the current taxiway labels. After consulting with dispatch and [Chief Pilot]; it was pointed out that page 10-8A/10-8B discussed further this taxiway change and indicated the new labels. None of the crew noticed this page. I recommend an OPS Alert be issued for something like this. The NOTAM seemed straight forward but unless you also noticed page 10-8A/10-8B; the NOTAM could easily be misunderstood to mean our current pubs we updated with 10-9/10-9B showing the correct information. Had an OPS Alert been issued; I feel it is very unlikely we or any crew would make this mistake.

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.