An ea-50 pilot reported his geo-referenced electronic airport diagram mis-located taxiway november a...

Narrative:

[We] departed from the east ramp at lnk. Cleared to taxi to runway 32; south on taxiway alpha; right on november; hold short of runway 35. We missed the turn on november by monitoring our progress on the geo-referenced [electronically displayed] airport diagram which incorrectly showed our location as north of november on alpha. Ground control notified us that we had missed the turn. The pilot flying and pilot not flying both looked at and confirmed the aircraft icon on the taxi diagram showed us north of taxiway november; i.e. Still approaching the taxiway; but we were; in fact; south. I am very concerned that spurious radio frequency signals from an avionics repair facility may have affected GPS performance. If true; this is a significant hazard for aircraft in the area. This should be investigated. Our safety officer has alerted all our crews to be alert to potential erroneous GPS positions on or near lnk.this even was a good reminder to always back up situational awareness during taxi operations by confirming location visually. Do not depend solely on geo-referenced taxi diagrams. We should practice CRM by explicitly communicating taxi clearances and monitoring progress as a crew. A larger issue is the potential adverse impact on situational awareness during taxi operations by depending too heavily on in cockpit automation.

Original NASA ASRS Text

Title: An EA-50 pilot reported his geo-referenced electronic airport diagram mis-located taxiway November at its intersection with Alpha at LNK.

Narrative: [We] departed from the east ramp at LNK. Cleared to taxi to Runway 32; south on Taxiway Alpha; right on November; hold short of Runway 35. We missed the turn on November by monitoring our progress on the geo-referenced [electronically displayed] airport diagram which incorrectly showed our location as north of November on Alpha. Ground Control notified us that we had missed the turn. The pilot flying and pilot not flying both looked at and confirmed the aircraft icon on the taxi diagram showed us north of Taxiway November; i.e. still approaching the taxiway; but we were; in fact; south. I am very concerned that spurious radio frequency signals from an avionics repair facility may have affected GPS performance. If true; this is a significant hazard for aircraft in the area. This should be investigated. Our safety officer has alerted all our crews to be alert to potential erroneous GPS positions on or near LNK.This even was a good reminder to always back up situational awareness during taxi operations by confirming location visually. Do not depend solely on geo-referenced taxi diagrams. We should practice CRM by explicitly communicating taxi clearances and monitoring progress as a crew. A larger issue is the potential adverse impact on situational awareness during taxi operations by depending too heavily on in cockpit automation.

Data retrieved from NASA's ASRS site as of April 2012 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	895592
Time
Date	201006
Local Time Of Day	1201-1800
Place
Locale Reference	LNK.Airport
State Reference	NE
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Eclipse 500
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Flight Plan	IFR
Component
Aircraft Component	Electronic Flt Bag (EFB)
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 25 Flight Crew Total 5100 Flight Crew Type 75
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Ground Incursion Taxiway

An ea-50 pilot reported his geo-referenced electronic airport diagram mis-located taxiway november at its intersection with alpha at lnk.