As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT ARRIVED FOR 600/1200 INSPECTION WITH FAIL SAFE SLEEVE MISSING FROM BLEED AIR MANIFOLD, PN 6019060-8 AS SHOWN IN IPC 36-10-09. PROBABLE CAUSE: MECHANIC FAILED TO INSTALL SLEEVE, POSSIBLY DUE TO ERROR IN THE PROCEDURE FOR BLEED AIR COUPLING INSTALLATION IN MM.