Maintenance Powerplant; Maintenance Airframe
Situational Awareness; Communication Breakdown
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Aircraft; Human Factors; Procedure
Aircraft X arrived at the gate with the APU duct pressure seal clamp not installed. The aircraft was taken out of service. This job takes approximately 4 hours to correct if you have no other issues. There have been several other aircraft with the same issue.
Air carrier Technician reported an APU pressure duct seal clamp not installed and took the aircraft out of service for maintenance.