Learjet 45
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 100; Flight Crew Total 15000; Flight Crew Type 3500
Situational Awareness
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Airspace Structure; Human Factors
I misspelled SARAA intersection and entered SARRA in the FMS. SARRA is a point in California on a similar heading. After PTW I flew about thirty degrees off course for 10 miles until ATC noticed the wrong track. Consideration should be given regarding the very close spelling of an intersection in the United States that is on a similar heading departing the Philadelphia area heading westbound. Perhaps a rename to one of the intersections with dissimilar spelling would be advantageous; or provide a SID for PNE with SARAA as an intersection in the departure SID.
Lear 45 Captain reported a track deviation related to a misunderstanding of the spelling of an enroute fix.