Hawker Winter 2002

• Warning: Garmin GNS-430/530 Incompatibility With Older Jet Aircraft Flight Management Systems
• Duncan Aviation Is Newest Grimes Authorized Sales & Service Center
• Confused About Manufacturers' Recommended Schedules For Hawker Batteries?

Warning: Garmin GNS-430/530 Incompatibility With Older Jet Aircraft Flight Management Systems

— Curt Campbell

Duncan Aviation technicians have discovered that an incompatibility issue exists between Garmin GNS-430/530 units and most Collins and Honeywell Flight Control Systems (FMS). In most cases, when GNS-430/530 units are coupled to a Collins or Honeywell FMS, the system will remain in NAV ARM and will not capture. This problem appears to be caused by the method in which the Garmin units provide navigation information to the FMS.

Operators should be reminded that these Garmin units were designed for the light twin and turboprop market. Recently, Duncan Aviation has fielded numerous calls from operators who have installed the GNS- 430/530 in older jet-powered aircraft and who are now experiencing these incompatibility problems.

Duncan Aviation recommends that only systems which are compatible with your current FMS should be installed in older jetpowered aircraft. Duncan Aviation is currently unaware of a solution for this incompatibility issue, although Garmin has been informed of its existence.

Duncan Aviation Is Newest Grimes Authorized Sales & Service Center

— Chris Gress

Effective immediately, Duncan Aviation is an Authorized Grimes Sales and Service Center. The agreement gives Duncan Aviation customers access to the complete line of Grimes products including strobe power supplies, battery power supplies, rotating beacons, navigational lights, etc. In addition, customers will be able to use Duncan Aviation accessory services seven days a week for service on Grimes products.

For more info about Grimes products and Duncan Aviation accessory services, contact Chris Gress at 800.228.4277 ext. 1664.

Confused About Manufacturers' Recommended Schedules For Hawker Batteries?

— Karl Detweiler

A recent Raytheon revision to the Hawker BAe 125 airframe maintenance schedules has removed the former time requirements for battery servicing, and added the statement that the battery servicing should be done in accordance with the battery manufacturers' recommended schedules. This statement includes the main aircraft batteries as well as many emergency batteries and battery packs that are on the Hawker aircraft.

Locating all the different battery manufacturers' maintenance schedule requirements might be somewhat difficult, especially when an operator includes all the emergency batteries and power supplies for standby navigational equipment and emergency lighting. At Duncan Aviation we have the manufacturers' recommended intervals for almost all batteries, battery packs and power supplies that might be found on a Hawker.

Duncan Aviation has consolidated these inspection requirements into a single sheet so that it is easy to find the manufacturers' current requirements. This sheet of requirements is readily available and easy to fax.

If you would like to receive our sheet of battery maintenance schedules for Hawker aircraft, or have further questions regarding battery inspections, maintenance or repair, please contact Chris Gress at Duncan Aviation Component Services at 800.228.4277, ext. 1664. You may also reach Chris by fax at 402.479.4151.

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