Citation II S2/Bravo (C550)
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor
Flight Crew Last 90 Days 60; Flight Crew Total 15000; Flight Crew Type 5000
Troubleshooting; Workload; Confusion; Situational Awareness; Distraction
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors; Procedure
Upon passing the final approach fix to ILS 10R; the Tower issued a low altitude alert to us. The tower radar showed us at 100 FT AGL. They instructed us to verify our altimeters set at 30.60. We verified; and cross referenced our flight instruments; and noted no GPWS warnings; or any variations of the flight instruments. At this point in [the] flight we were at 600 FT AGL. We continued the approach to a full stop landing. Upon landing the Tower told us that it was a problem on their end. I did call TRACON; and asked just what the problem was. They told me that they had their altimeters set at 29.60. I questioned whether I took the appropriate action in continuing on the approach to a full stop landing. We are always taught to trust our instruments; but maybe a missed approach would have been a better choice.
A Class B Tower Controller set the facility's altimeter at 29.60 with an actual altimeter of 30.60 and as a result issued an aircraft on final a low altitude alert when in fact the aircraft was on profile.