What was found
PDIS 321 36-22 5781 10FEB19 ABQ OPEN U LOGPAGES:3072516 AT FL350 MANF 1 ON AIR STATUS PAGE WENT RED.FOLLOWED BY A LEVEL 3 AIR MANF 1 FAIL ALERT. AIRCRAFT SYSTEMS TURNED #1 BLEED TO OFF AND CREW ACCOMPLISHED QRH INFO 10FEB19 17:38 MEM R WITH PACKS OPERATING FOUND 2 EACH SLEEVE COUPLER SEALS GOING INTO BOTH HEAT EXCHANGERS LEAKING AND CLAMPS LOOSE. RESECURED CLAMPS ON BOTH PACKS. REF JRH, RAN ALL 3 ENGINES APPROXIMATELY 10 MINTUES BOOSTING POWER ON #1 UP TO 85%N2 FOR VALVE SHIFT INDICATION. ALL INDICATIONS NORMAL. NO FAULTS NOTED DURING RUN. ACFT OK FOR SERVICE