The following information may be helpful for Citation operators as they plan for maintenance events in 2025. 

SL525B-05-04: Mandatory Service Letter for CJ3 Operators — At the first of the year, Textron released a revision to Chapter 5 by revising inspection intervals on the vertical, horizontal stabilizers, and engine mount beams on the CJ3. It applies to the higher time aircraft 6,000 hours or more.

The Model 525B Maintenance Manual Revision 27, Chapter 4, Revision 8 Airworthiness Limitation changes the inspection intervals for the Chapter 54 — Nacelle/Pylons and Chapter 55 — stabilizer locations. To ensure the continued airworthiness of fielded aircraft, the operators must follow these revised inspection requirements.

This service document must be accomplished within 150 flight hours or one year from the date of receipt, whichever occurs first.

SIL CBS28-1-2024-001 REV C: 525 Series-560 Series-680-680 operators now have a solution for troublesome standby battery packs P/N CBS 28-1. These battery packs require replacement at 12-month intervals and are typically on back order. This can result in a delay of up to 2 to 3 weeks depending on the vendor, which can have a negative effect on getting the aircraft returned to service.

SIL CBS28-1-2024-001 REV C provides instructions for field replacements of the CBS28-1 battery pack to support a proactive maintenance process with either new (Radiant P/N 2503) or reconditioned (Radiant P/N 2503W) battery packs.

This repair option allows us to change the individual battery packs instead of waiting for an assembly that may be on back order from the OEM for an extended period of time, reducing the overall downtime of the aircraft.