What was found
STRONG EXHAUST SMELL IN FLT DECK WHEN RUNNING APU AT THE GATE WITH PACK 1. FOUND APU BLEED VALVE INNER GASKET TO BE WORN. R&R BLEED VALVE REF TO AMM 36-12-03. NO FIX TRANSCRIBED TO LP 391921-3 FOR APU BLEED MEL. 26JUL26 12:41 ROA AIR LEAK WAS PREVIOUSLY FOUND TO BE ON AFT END OF APU BLEED AIR CHECK VALVE ADDITIONAL LEAK WAS FOUND TO BE IN COUPLING AT THE AFT END OF BLEED AIR PIPE WITH THE APU BLEED AIR CHECK VALVE R&R APU BLEED AIR CHECK VALVE IRW AMM 36-12-02 O-RING AT AFT COUPLING WAS FOUND TO BE BROKEN R&R AFT COUPLING O-RINGS AND REINSTALLED ASSOCIATED BLEED PIPE IRW AMM 36-11-09 RAN PACK SYSTEM OFF APU BLEED IN MULTIPLE DIFFERENT CONFIGURATIONS NO SMELL NOTED AT THIS TIME A/C OK FOR SERVICE.