Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Communication Breakdown; Troubleshooting
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Company Policy; Procedure
Picked up assigned aircraft from Company's Maintenance Vendor.  We found numerous maintenance discrepancies on the aircraft previously; the reason for the aircraft's return to Maintenance status.Two discrepancies found during the second pre-flight: A.  One of the Maintenance Log forms was missing from the aircraft's log-book.  It was a fixed discrepancy for a suspected; turned out to be an actual; oil leak on the left engine.  I would not have known said Maintenance Log form was missing if I wasn't the one to write up said discrepancy.  Yet another sign to the great deficiencies the Company's aircraft logbook system has; and; the issues the Company has with quality control.Furthermore; the aforementioned missing Maintenance Log form was the one and only form with the maintenance release for this event in section 4 of the Maintenance Log.  The Inspector that brought out the form mentioned said fact.  I am not able to find a reference in the FOM in which the PIC is responsible to ensure a maintenance release is found for each maintenance event.  The FOM states that section 4 of the Maintenance Log is only for Maintenance use.  Does that mean the PIC is not responsible to ensure at least one maintenance release has been signed off for each maintenance event?B.  I previously wrote up two exterior APU cover fasteners to be either of the wrong type; too long; or; not properly fastened.  The corrective action stated that the vendor found the Company used a total of 4 wrong fasteners for said cover and the 4 were replaced with the correct ones.  My first question:  What are the consequences of using the wrong parts for the aircraft?  How and why does it happen that wrong parts are used for the aircraft.Secondly; upon the pre-flight inspection I found one of the replaced fasteners not to be fastened.  Yet another example of the Company's lack of Maintenance quality control.
A CE-560XLS pilot discovered a missing maintenance logbook page on which he personally had entered an oil leak discrepancy and separately an APU access panel with incorrect fasteners which was cleared but later found with one incorrectly secured.