What was found
(CAN) REJECTED TAKEOFF AT 50 KTS DUE NR 1 AC GEN FAILURE. RESET UNSUCCESSFUL MAINTENANCE TROUBLESHOOTING AS FOLLOWS: NO.1 AC GEN CHIP DETECTOR INSPECTED, NO METAL FOUND. NO.1 AC GENERATOR S/N 1152218-00724 REMOVED AND NEW S/N 1152218-00699 INSTALLED IAW AMM 24-21-01-000-801/24-21-01-400-801 WHICH FAILED DURING OPERATIONAL TESTS. NO.1 AC GEN CHIP DETECTOR SCREEN FOUND FULL OF NON-MAGNETIC DEBRIS AND FINE ALUMINUM WIRE. AT THIS TIME, IT IS UNKNOWN WHICH AC GEN CAUSED THE DEBRIS. SHOP VENDOR TEAR DOWN REPORTS HAVE BEEN REQUESTED. NO.1 AC GEN S/N 1152218-00699 REMOVED AND S/N 1152218-00659 INSTALLED WITH OPERATIONAL TEST C/O IAW TASK 24& 8722,21& 8722,01& 8722,000& 8722,801/24& 8722,21& 8722,01& 8722,400& 8722,801 & TASK 24-21-00-710-801 WITH NO FAULT FOUND.