Maintenance Controller reported a rejected take off was caused by a #1 GEN/IDG Light illuminated. The Flight Crew performed a part power run to confirm that there was no fault indicated and departed the airport. The aircraft was removed from service at destination for #1 IDG low oil quantity after the light illuminated again in flight.

Narrative

Aircraft X. Date. ZZZ-ZZ1. Crew contacted myself in m/c after receiving a #1 IDG (Integrated Drive Generator) caution while on take off roll. Crew stated abort was at about 40 knots; after power reduction the #1 IDG/GEN message cleared. Reviewing GMM (General Maintenance Manual) XX-XX it was determined that the event did not qualify as an ODI (oerational difficulty incident) as the thrust levers were not advanced to the takeoff position. Discussed with crew on ability to perform a test of the IDG at an advanced power setting to see if the message returned; crew agreed and the test was performed with no faults reported. Since no QRH (Quick Reference Handbook) or reset action was performed it was agreed that this could be documented as a transient anomaly (information only logbook documentation) per FOM. Aircraft departed ZZZ-ZZZ1 and received same message on climb out - crew elected to continue to ZZZ1 where the a/c was taken out of service and ultimately the #1 IDG was replaced due to low oil. Event was brought to my attention by my manager due to an ongoing review due to a pilot report of the event. #1 IDG/GEN caution due to potential low oil qty.