A g-iv captain reported landing with their altimeters set 1' off; resulting in an error of over 800 ...

Attributes
ACN	1410923
Time
Date	201612
Place
Locale Reference	IND.Airport
State Reference	IN
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Gulfstream IV / G350 / G450
Operating Under FAR Part	Part 135
Flight Phase	Initial Approach
Route In Use	Visual Approach STAR SNKPT2
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 75 Flight Crew Total 12800 Flight Crew Type 2200
Events
Anomaly	Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance

Narrative:

On arrival to ind we were cleared for the SnakePoint2 RNAV arrival (SNKPT2). This arrival has multiple crossing points with altitudes ranging from at or above/below; and in between. The aircraft FMS was properly set and the entire arrival was flown without incident; until at 5000 feet; approach queried us if we wanted vectors for our descent. Still not realizing our error we declined; and landed visually at ind.during taxiing we both noticed altimeters reading -40 ft. Elev in ind is 796ft. We were both stunned when we realized our error. Altimeter setting for this day was unusually high with 30.67 in.; and somehow we managed to set it to 29.67; a difference of 800 ft. With nearly 30;000 flight hours between us; we still managed to do an elementary but very serious mistake. Even following checklist and proper procedures this mistake managed to creep in with a very detail oriented and experienced crew. A wake up call indeed.

Original NASA ASRS Text

Title: A G-IV Captain reported landing with their Altimeters set 1' off; resulting in an error of over 800 feet. Error was noted during taxi in and went unnoticed on approach when TRACON queried if they wanted vectors for their descent.

Narrative: On arrival to IND we were cleared for the SnakePoint2 RNAV arrival (SNKPT2). This arrival has multiple crossing points with altitudes ranging from at or above/below; and in between. The aircraft FMS was properly set and the entire arrival was flown without incident; until at 5000 feet; approach queried us if we wanted vectors for our descent. Still not realizing our error we declined; and landed visually at IND.During taxiing we both noticed altimeters reading -40 ft. Elev in IND is 796ft. We were both stunned when we realized our error. Altimeter setting for this day was unusually high with 30.67 in.; and somehow we managed to set it to 29.67; a difference of 800 ft. With nearly 30;000 flight hours between us; we still managed to do an elementary but very serious mistake. Even following checklist and proper procedures this mistake managed to creep in with a very detail oriented and experienced crew. A wake up call indeed.

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.

A g-iv captain reported landing with their altimeters set 1' off; resulting in an error of over 800 feet. Error was noted during taxi in and went unnoticed on approach when TRACON queried if they wanted vectors for their descent.