As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH APU ON BUS TRANSFER SWITCH OFF LEFT APU GEN ON TR NR2 SHOWS 24 VDC (REFERENCE CHECKLIST 7.000 PG 10 STEP 6A B8.) RIGHT APU GEN ON TR NR 1 SHOWS 25 VDC (REF CHECKLIST 7.000 PG 11 STEP F 1 5). PERFORMED T/R BUS TRANSFER TEST IAW B737NG AMM 24 31 00. NO DEFECTS FOUND.