Assigned to descend via the serfr one arrival and to expect the tipp toe visual to runway 28L at sfo...

Narrative:

Upon descent into sfo on the serfr one arrival; we were cleared to descend via the arrival. The arrival terminates with menlo at 4;000 feet. However; we were told to plan the tipp toe visual to 28L. The first fix is menlo at 5;000 feet. Then; ATC asked us to maintain 6;000 feet. These altitude differences caused minor confusion. Despite the confusion; the aircraft remained on VNAV path and the approach proceeded without incident. The purpose of this report is to highlight the altitude differences which cause minor confusion. Also; while remaining on the descent path; we were informed by ATC that we would leave class bravo airspace. We re-entered within a mile or so. No known violation or deviation occurred; we just want to highlight the confusion.

Original NASA ASRS Text

Title: Assigned to descend via the SERFR ONE Arrival and to expect the TIPP TOE Visual to RWY 28L at SFO; B737 First Officer noted a 1;000 FT variance in the altitudes at MENLO for the two procedures.

Narrative: Upon descent into SFO on the SERFR ONE Arrival; we were cleared to descend via the arrival. The arrival terminates with MENLO at 4;000 feet. However; we were told to plan the TIPP TOE visual to 28L. The first fix is MENLO at 5;000 feet. Then; ATC asked us to maintain 6;000 feet. These altitude differences caused minor confusion. Despite the confusion; the aircraft remained on VNAV PATH and the approach proceeded without incident. The purpose of this report is to highlight the altitude differences which cause minor confusion. Also; while remaining on the descent path; we were informed by ATC that we would leave class Bravo airspace. We re-entered within a mile or so. No known violation or deviation occurred; we just want to highlight the confusion.

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.

Attributes
ACN	1254106
Time
Date	201504
Place
Locale Reference	SFO.Airport
State Reference	CA
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR SERFR ONE
Flight Plan	IFR
Person 1
Function	First Officer
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy

Assigned to descend via the serfr one arrival and to expect the tipp toe visual to runway 28L at sfo; B737 first officer noted a 1;000 ft variance in the altitudes at menlo for the two procedures.