B757-200
Maintenance Airframe; Maintenance Powerplant
Situational Awareness; Training / Qualification
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Human Factors; Procedure
In the forward cargo compartment; at station 801.25; the smoke detection sampling orifice tube was found to be covered by the ceiling liner. No hole was cut in liner for the sampling tube to protrude. It appears to be a brand new ceiling liner that may have been recently installed. It is really difficult for cargo fire detector to work if the sampling tube is covered.
Maintenance personnel discovered that the B757 forward cargo compartment ceiling panel liner was covering a smoke detector sampling tube.