What was found
DURING HEAVY MAINTENANCE: APU GROUND SERVICE MODE TESTS; REFERENCES: REF/1/ APU GROUND MODE TESTS, REF/2/ SERVICE PANEL WIRING CHECKS, REF/3/ EMAIL CORRESPONDENCE. DESCRIPTION: THIS EC GIVES AUTHORIZATION AND INSTRUCTION TO PERFORM TROUBLESHOOTING STEPS PER REF/1/ AND REF/2, THEN REMOVE AND REPLACE GROUND SERVICE PANEL P/N C06420300-01. THIS INSTRUCTION WAS GIVEN BY AIRBUS CANADA IN REF/3/. (E/C: AC24-669-01).