As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED MAINTENANCE THE APU WOULD NOT START ON FIRST ATTEMPT (BUT LARGE FUEL ODOR PRESENT) THEN STARTED ON SECOND ATTEMPT. SEEMS TO ABORT START AT APROXIMATLEY 25 PERCENT RPM. PERFORMED AN OPERATIONAL CHECK ON APU IAW CRJ 700 AMM 49-10-00. NO FAULTS FOUND. NO OTHER ODORS NOTICED. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.