Regional Jet 200 ER/LR (CRJ200)
Maintenance Airframe; Maintenance Powerplant
Communication Breakdown; Confusion; Situational Awareness
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Chart Or Publication; Human Factors; Incorrect / Not Installed / Unavailable Part; Manuals
My response to the investigation for how I installed the incorrect APU Fuel Feed line is that I was confused by the Illustrated Parts Catalog (IPC) and what Part Number (P/N) was interchangeable.  When researching the IPC; I found that there was no Check Valve P/N 2950001-101 in stock in ZZZ.  Upon looking further for an Alternate Part Number I found that P/N 2920030-103 was a qualified interchange (IPC 28-24-00; Item 61C). My mistake came when I didn't realize that by installing this superseded valve; it would negate the intent of Service Bulletin (S/B) 601R-28-008 that the P/N 2950001-101 [Check Valve] was installed against.  Other than by the P/N of the check valve that came off; I am still not sure if this aircraft is 'Pre' or 'Post' Service Bulletin because as part of the SB; there was to be a Logbook entry that the S/B was incorporated; to which I cannot find in Maintenance Records. There should be documentation stating that P/N 2950001-101 [S/B Check Valve] can only be installed as an APU Fuel Feed Check valve; without any possibility of an interchange.  I would like to see at least a Master Inventory List (MIL) or a Company Aircraft Supplement to the IPC showing Service Bulletin (S/B) 601R-28-008C pictures for each valve and their part number. Clearing a [fuel] MEL.
An Aircraft Maintenance Technician (AMT) describes how an inadequate Illustrated Parts Catalog (IPC) and lack of a Logbook reference to a Service Bulletin; contributed to his installing an incorrect APU Fuel Feed line Check Valve on a CRJ-200 aircraft.