What was found
AIR PACK 1 REG FAULT. ACCOMPANIED WITH BURNING RUBBER SMELL. SELECTING PACK 1 TO OFF STOPPED BURNING SMELL. GROUNDED - YES. PERFORMED ADJUSTMENT OF NR 1 RAM AIR INLET ACTUATOR PER AMM 21-61-51-820-001-A . BITE TEST WAS "OK". NO DEFECTS NOTED. FOR BURNING RUBBER SMELL RESOLUTION REF. LOG PAGE 8037093 ITEM 1. ACCOMPLISHED VISUAL INSPECTION OF PACK 1 AND DUCTING REF AMM 21-20-00, NO DISCREPANCIES NOTED. PERFORMED PACK OPERATION WITH APU BLEED, NO ODORS NOTED ON PACK 1 OR 2. PACK 1 & 2 OPERATION UNDER ENGINE BLEED SUPPLY ON IDLE, PRODUCED NO ODORS ON EITHER ONE.