Air carrier technician reported during a quick engine change on a B737 MAX aircraft; they found several engine mount to engine bolts loose.

Narrative

Note: I was informed by those who trusted me to report it. The data took weeks to collect. The report program has been stalled for a long time (systemwide low volume of reports) and I am reporting this as I know silence is dangerous and is not a safety strategy. Event Description:During a Quick Engine Change (QEC) engine installation; several engine-mount-to-engine bolts were discovered to be only finger-tight. This was identified before flight; but only by chance--not through any established control in the QEC process.Background:QEC Shop does not use RII (Required Inspection List) or Inspection Task lists because its work is Off-Wing.QC (Quality Control) is applied for Magnetic Chip Detectors and IDG (Integrated Drive Generator) Harness buybacks; but not for engine mounts.No QC verification or equivalent SMS (Safety Management System) control exists for engine mount installation during QEC work.Contributing Factors:Engine mounts shipped separately for Leap 1B engines arrive without torque requirement tags.SMS controls intended to replace QC inspection failed to detect the untorqued condition.No procedural requirement for torque verification on mounts installed during QEC.Hazard Description:Engine mount bolts were finger-tight during installation. This is equivalent to sending a loaded truck down the highway with lug nuts only spun on by hand--it holds until it doesn't.Risk Level:High - Potential for catastrophic engine separation in flight.Corrective Actions:Implement mandatory torque verification step for engine mounts during QEC installs.Update QEC work instructions and SMS controls to include engine mount torque verification.Reinforce technician training on engine mount criticality.Require suppliers to provide clear tagging/documentation on shipped mounts indicating torque requirements.Suggested Resolution: Implement Interim Barrier Until QC Returns Assign designated inspector or peer-check process for engine-mount torque verification. Implement visible protections for reporters and communicate non-punitive reporting policy so that report volume returns to normal volume.