As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER POWER TRANSFER FROM APU GENERATOR / GPU TO IDG OR VICE VERSA. NUISANCE MESSAGE "GROUND CALL" OR "CARGO CALL" APPEARS ON EICAS W/ ASSOCIATED CHIME AND DISCREET LIGHT.(<P>PERFORMED POWER TRANSFER CHK AND NO TROUBLE FOUND WITH EICAS MSG & CHIME AND DISCREET LIGHT PER AMM 71-00-00/501 & 49-11-01/501. <BR /></P>)