What was found
JET FUEL ODOR DURING FLIGHT WOULD VARY BETWEEN STRONG AND WEAK. PASSENGER COMPLAINING OF STRONG ODOR AND IRRITATION. REF WO 157846 MWC 1-4. FOUND CRACKED FWD MANIFOLD LINE ON APU. R & R MANIFOLD LINE AND CHANGED COALESCER BAGS IAW AMM 49-31-09 AND 21-51-00. APU REQUIRES R & R. NO FIX REMAINS ON MEL FUEL DOES NOT LEAK WHEN APU IS OFF. FOUND BAD THREADS AT THE FUEL FLOW DIVIDER AND PRIMARY MANIFOLD. REMOVED APU, REPLACED BAD DIVIDER AND MANIFOLD INSTALLED APU OPS AND LEAK CHECKED GOOD.