As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL ODOR IN CABIN AFTER STARTING APU ON TAXI IN. APU AIR SWITCH ON. CONFIRMED FUEL SMELL IN CABIN(AFT). FOUND APU FUEL CONTROL LEAKING FUEL AT LOWER FITTING. TIGHTENED FUEL LINE MD88 IPC 49-31-00 FIG 1(SHEET 2) ITEM # 265. LEAK CK OK. NO FUEL LEAKS NOTICED. C/W FULL DUCT BURNOUT REF MD90 AMM 21-53 AND CHANGED SOCKS AND WASHED APU INLET REF AMDS W/C 4900-18. (LP# 5899738)