Falcon Winter 2006

• Falcon 10/900/2000 Fire Shuttle Valves
• F50 PATS APU Exhaust
• F50 4C Tail NDT Requirements
• F50 Main Landing Gear Torque Link Damage
• Avionics Loaner Policy Adjustment

Falcon 10/900/2000 Fire Shuttle Valves

— Mark Goertzen

When weighing fire bottles or replacing bottle squibs, it’s a good practice to check for seizing of the shuttle in the double check valve (P/N 861585). These valves route extinguisher media to the proper place offering two bottle shots to the same area.

Duncan Aviation technicians have found seized shuttles in the body of the valve. By simply removing the valve, applying a low-pressure source of air and “scooting” the shuttle from one end of the body to the other, proper operation can be checked. If needed, look for Service Bulletins from Dassault on procedures and replacement.

F50 PATS APU Exhaust

— Kevin Bornhorst

Does your F50 PATS APU exhaust stack external seal fit poorly? If the white seal sticks out into the air stream and doesn’t fit properly around the stack, try using the F900 seal P/N BA5325. The P/N BA5325 seal fits a 7.375” ID diameter hole and the F50 P/N BA3965 fits a 6.250” ID diameter hole. The larger seal fits the stack better allowing for easier installation and allows the stack to protrude completely through the seal. This will help prevent corrosion from developing in and around the exhaust stack area.

F50 4C Tail NDT Requirements

— Mark Goertzen

Please note new 4C requirements (WC 704.0/2) due for older F50 aircraft. Most notable are the NDT checks of the Horizontal and Vertical Stabilizer lugs. Duncan Aviation has recently been approved to perform these tasks by Dassault. Contact Airframe Service Sales Representative Pete Hubbard for a quote or Todd Evers, Team Leader NDT, for technical questions regarding this requirement at 800.228.4277.

F50 Main Landing Gear Torque Link Damage

— Mark Goertzen

When doing your next walk around, check the MLG upper torque links and any interference they might have with the brake assembly aft hydraulic brake line “B” nuts. “B” nuts are coupled with a 45° union that is attached to the brake unit itself. If this union is angled towards the link, contact could happen when the gear is at its greatest compression i.e., during heavy weight landing. A limited amount of “score” damage is allowed on these links. Contact Mark Goertzen or Ron Grose at 800.228.4277 (LNK) or Kevin Bornhorst at 800.525.2376 (BTL) for any questions concerning this or any Falcon technical issue.

Avionics Loaner Policy Adjustment

— Rick Whitesell

For more than 30 years, Duncan Aviation’s free loaner program has kept customers flying when their avionics and instrument units required repair or overhaul. During these many years costs associated with operating business aircraft have soared. Duncan Aviation loaners have remained free and will continue to be free; however, a slight adjustment is warranted.

Recertification of every loaner unit returned to Duncan Aviation is a requirement. Duncan Aviation has always absorbed the cost of returning loaners to service during the recertification process, but now we are asking customers to help shoulder the cost of returning these units back to manufacturer specifications. Recertification fees will range from between $50 and $200 depending on the time it takes to recertify a particular unit.

If you have questions about the recertification fee, contact Rick Whitesell at 800.LOANERS.

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