What was found
FLT#355, JFK-ONT. 'AT TOP OF DESCENT AS POWER WENT TO IDLE CA AND FO SMELLED A STRANGE ODOR. MAINLY FLIGHT DECK AFT GALLEY AFTER PARKING (PACKS); C/W ENG #1 DETERGENT WASH PER WO 1203105 LEVEL A ECS PREVIOUSLY C/W REACTIVATED PACK # 1 FLOW CONTROL VALVE IAW AMM 21-51-00 RAN ENGINE FOR LONG DURATION. NO ODORS WERE NOTED. OK FOR CONTINUED SERVICE. MDDR CLOSED. MX- 4 UPDATED.' (SUPPLEMENTAL INFORMATION ADDED)