A nacelle shop Mechanic reports about multiple discrepancies that were found in parts they received from a Contract Repair Station. Incorrect references to Component Maintenance Manual (CMM) and Structural Repair Manuals (SRM) for the work accomplished were also noted. Parts had been signed-off as serviceable on an FAA-8130 Tag.

Narrative

Received pylon rib cover assembly from [stores] parts with an FAA-8130 Tag and disposition report as certifying this part as serviceable. Upon inspecting part; as we as a group at nacelle shop have to further inspect parts to ensure proper procedures and materials were used to repair parts that Contract Maintenance provider; Repair Station X; repairs [for us]. Reputation of Maintenance Provider X; as a Repair Station; is below current standards and every part received from them must be inspected further. The [repair] materials used and [Maintenance Manuals (M/M)] references used as stated in disposition report are an indication of how [Contract] Vendors are mass producing repairs that don't apply and require some thought. Repair Station X used seal Part Number # XXX when the book calls for seal Part Number 228-50753-102. The rivets Repair Station X used were [Corrosion Resistant] cr3212-4 type rivets. The book [Component Maintenance Manual (CMM)] calls for ms20601-4 type rivets; which would call for a different reference than the one Repair Station X used. Also; Repair Station X used seal Part Number cvc10091-66; when [CMM] book calls for 228-50793-139. Repair Station X used the reference for Cherry Max rivets Structural Repair Manual (SRM) Chapter 51-42-13 when the seal has no rivets and is secured in place in accordance with SRM Chapter 51-22-00. Also; the reference for a paint primer is in CMM Chapter 20-25-06 and Repair Station X used the reference for a Torque Box; which is in CMM 78-30-00. I also question the validity of Repair Station X's SRM reference; that Repair Station X uses to repair parts that deviate from the CMM. The Repair Station's SRM needs to be looked over with a fine tooth comb as they are using the whole SRM and not just a specific repair. Don't use Repair Station X as a [Contract] Vendor! These parts can be repaired by current nacelle shop employees. Part in question will remain here until this issue gets resolved or until directed otherwise by management.