B737-900
Maintenance Airframe; Maintenance Powerplant
Communication Breakdown; Troubleshooting
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Aircraft; Incorrect / Not Installed / Unavailable Part; Procedure
This report is filed to report a maintenance omission.Aircraft X arrived with an APU keel duct pressure seal missing. The aircraft was taken out of service because of the lengthy time required to correct this issue. This can lead to pressurization leaks/issues. There have been several other aircraft with the same issue.
Technician reported a clamp missing on the APU pneumatic duct pressure seal on a B737-900. The aircraft was removed from service due to the length of time required to install a new clamp.