i should run the engines and check the bleed syst(especially the hp closure at certain psi/eng rpm and reopen)
if all ok, release the airplane, and monitor further pipers
as mentionned above, hp should be open in descent(except if they throttle up)
signoff would be" adj/test satif rem mm 36-bla-bla-bla and if problem reoccurs plz report throttle setting and bleed press and other parameters such as anti-ice"