Small Transport
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (mon) 3
Confusion; Distraction; Human-Machine Interface; Situational Awareness; Troubleshooting
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance
Human Factors; Procedure; ATC Equipment / Nav Facility / Buildings
Aircraft X was inbound on the localizer for ILS Runway 2 approach into OGG.  At about 9 DME; Aircraft X's data tag disappeared off my scope.  I then called OGG tower and asked if they had the data tag.  They didn't have it so I manually coordinated the call sign and approach they were on.  I don't know the reason why it happened but I think there was another aircraft that had the same call sign so someone decided to remove this one. If it was another aircraft with the same call sign; the company should be told not to file planes on the same day with same call signs.  This happens quite frequently with the local companies but normally I would just change the new aircraft to the same and add the letter 'A' to the end.  I think another controller removed the call sign to use it for the new aircraft.  We should have procedures for this too.
A Honolulu Control Facility (HCF) Controller reports of losing a data tag with an aircraft on a 9 mile final. The Controller coordinates with tower; but doesn't know why the data tag went missing. The Controller assumes someone dropped the data tag because of a different flight with the same call sign.