Date: 201309
Local time of day: 0601-1200
Location: ZZZ.Airport, US
Light: Daylight
Aircraft: Citation Excel (C560XL)
Operator: Fractional
Operating under: Part 91
Mission: Passenger
Flight phase: Cruise
Aircraft component: HF SSB
Reporter organization: Fractional
Reporter function: Technician
Reporter qualification: Maintenance Powerplant; Maintenance Inspection Authority; Maintenance Airframe
Human factors: Situational Awareness; Confusion; Communication Breakdown
Anomaly: Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Maintenance
When detected: In-flight
Result: General Flight Cancelled / Delayed; General Maintenance Action
Contributing factors: Human Factors; Incorrect / Not Installed / Unavailable Part; Manuals
Primary problem: Manuals

Narrative: Early afternoon 201309; Avionic's Maintenance Controller X notified me that an incorrect Part Number (P/N) XXX-913 [Audio Control Panel] was installed on a CE-560XL; Aircraft X. After verification that this was correct; I notified the Maintenance Director. We noted the aircraft was in flight and we then cancelled all future flights until this could be corrected. I ordered and set up Maintenance to have the Correct P/N XXX-915 installed. I then verified this with the CE-560XL Illustrated Parts Catalog (IPC) 23-50-00; Figure 01; Revision 27; P/N XXX-913 Mod D and G for the S/N range for our CE-560XL aircraft with no IPC 'notes' that should be installed on Aircraft X.  Per Avionics Maintenance Controller X; this is incorrect because all of our aircraft have a Honeywell HF Systems installed.  IPC Item 2; P/N XXX-915 Mods D and G; [with] Note 2; is acceptable for aircraft with Honeywell HF Systems.  But the IPC shows the ['Effective'] S/N Range for [P/N XXX-915] is beyond Aircraft X's Line S/N range.  The IPC is not accurate. This was caught because there was a mismatch report that showed twelve days earlier; that P/N XXX-915 was removed and P/N XXX-913 was installed.   [Recommend]1) The Aircraft Manufacturer's CE-560XL Illustrated Parts Catalog (IPC) is not accurate for P/N XXX-913 and     P/N XXX-915 [Audio Control Panel] and should be corrected.  2. Our Maintenance Computer software also lacks in areas; the information that shows installed components is not always accurate; for this particular issue it shows a XXX-915 with two different S/Ns installed into the #1 position.

Callback: Reporter stated the mismatch in Serial Numbers (S/N) was found by company personnel that handle the paperwork review of parts that clear aircraft for Return to Service (RTS). One of their Avionics Maintenance Controller's [Controller X] recognized that the S/N in the Cessna Illustrated Parts Catalog (IPC) for the Honeywell HF System [Audio Control Panel] that was replaced on one of their CE-560XL aircraft; was not an accurate S/N for the aircraft's manufactured Line Serial Number. Adding to the problem was the software they use in their Maintenance Computer program that all their Technicians use; does not always give a Serial Number (S/N) range for parts that are 'Effective' on a particular aircraft. In their case; the software information in their Maintenance program was limited and the Cessna IPC information was also not accurate.



Synopsis: An Aircraft Maintenance Technician (AMT) describes the lack of information in their Maintenance Computer software program and the confusion from conflicting information in the Illustrated Parts Catalog (IPC) that led to an incorrect Audio Control Panel being installed in a company CE-560XL aircraft.