A B737-300 flight crew; cleared to descend via the wahuu RNAV STAR to den noted the charted crossing...

Narrative:

No deviation occurred for this flight. We were cleared direct to sayge intersection on the wahuu arrival into den some distance out. Approximately 90 miles from sayge; I decided to brief the approach with the captain. We noticed the crossing restriction in the FMS over sayge was different than what was on both of our commercially provided plates. The FMS showed sayge at 250 KTS between FL210-230. Our plates showed sayge at 250 KTS between 17;000-FL190. We checked the FMS update again and it was valid. We checked our ops binders for any plate revisions and there were none for this arrival. Both our plates showed the same effective date. About this time; we were cleared to descend via the wahuu arrival. We asked ATC if they could confirm the altitude restrictions over sayge. He stated that 250 KTS between FL190-17;000 were the correct restrictions as our plates showed. We had no idea why the FMS was not in tune with this arrival. All other points on the FMS arrival were correct. The captain and I decided to split the difference and entered FL180 as a hard altitude since you cannot enter a 'between' altitude into this FMS. VNAV was re engaged and the aircraft descended normally. A determination needs to be made why our FMS database; even though current; is not accurate for this arrival. Had we assumed the FMS arrival data was correct; a major altitude deviation would have occurred.

Original NASA ASRS Text

Title: A B737-300 flight crew; cleared to descend via the WAHUU RNAV STAR to DEN noted the charted crossing at SAYGE in the FMS database was different from that published on their commercially provided aero chart.

Narrative: No deviation occurred for this flight. We were cleared direct to SAYGE Intersection on the WAHUU Arrival into DEN some distance out. Approximately 90 miles from SAYGE; I decided to brief the approach with the Captain. We noticed the crossing restriction in the FMS over SAYGE was different than what was on both of our commercially provided plates. The FMS showed SAYGE at 250 KTS between FL210-230. Our plates showed SAYGE at 250 KTS between 17;000-FL190. We checked the FMS update again and it was valid. We checked our Ops binders for any plate revisions and there were none for this arrival. Both our plates showed the same effective date. About this time; we were cleared to descend via the WAHUU Arrival. We asked ATC if they could confirm the altitude restrictions over SAYGE. He stated that 250 KTS between FL190-17;000 were the correct restrictions as our plates showed. We had no idea why the FMS was not in tune with this arrival. All other points on the FMS arrival were correct. The Captain and I decided to split the difference and entered FL180 as a hard altitude since you cannot enter a 'between' altitude into this FMS. VNAV was re engaged and the aircraft descended normally. A determination needs to be made why our FMS database; even though current; is not accurate for this arrival. Had we assumed the FMS arrival data was correct; a major altitude deviation would have occurred.

Data retrieved from NASA's ASRS site as of July 2013 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	1080144
Time
Date	201304
Local Time Of Day	1201-1800
Place
Locale Reference	ZDV.ARTCC
State Reference	CO
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR WAHUU ONE
Flight Plan	IFR
Component
Aircraft Component	FMS/FMC
Person 1
Function	Pilot Flying First Officer
Experience	Flight Crew Last 90 Days 236
Events
Anomaly	Aircraft Equipment Problem Critical

A B737-300 flight crew; cleared to descend via the wahuu RNAV STAR to den noted the charted crossing at sayge in the FMS database was different from that published on their commercially provided aero chart.