Cessna 402/402C/B379 Businessliner/Utiliner
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
General None Reported / Taken
ATC Equipment / Nav Facility / Buildings; Aircraft; Environment - Non Weather Related
While established on the localizer for the approach to Runway 22L in Boston; the GPS signal was lost numerous times (more than 3) from 20 miles out from the runway to 5 miles out. Each time the GPS failure message remained for approximately 10-15 seconds before signal returned. The weather was VFR and navigation was not affected.
C402 Captain experiences a loss of GPS signal on three or more occasions; from 20 miles out to five miles out; while flying the localizer to Runway 22L at BOS.