The latest service letters will be posted on this page.  Please return often to maintain your aircraft in the best possible fashion!

A Service Bulletin is the equivalent of an AD on a Certified Aircraft.  In the Experimental Regulations, no channel exists for AD's, as such we call them Service Bulletins.  A Service Letter is either a suggested change, or designed as an assistance to the owner for an area where multiple difficulties arise.

M1=Model 1 S5=Series 5 All
M2=Model 2 S5=Series 5 Safari/Outback
M3=Model 3 S5=Series 5 Voyager/Vixen
M4=Model 2-1050 S6=Series 6
M4/C4=Model 4-1200 L=Lite
M4=Model 4 Speedster L2=Lite²
S7=Series 7




SERVICE LETTERS Click Title for Link



#1-Finger Strainers   Early M1 (Prior to Letter) 
#2-Fuel Tank Installation    Early M1 (Prior to Letter)
#3-Spark Plugs and Shields   Early M1 (Prior to Letter)
#4-Spinner    Early M1 (Prior to Letter)
#5-FAB-11 & FAB-13 Bushings, Elevator Control Tube    M1 SN: 56-112
#6-Rotax 532LC Rubber Intake Flanges 11/7/1986 Specific SN Rotax Engines 
#7-Wing Tank Fuel Caps 5/6/1987 M1 (Prior to Letter)
#8-Lift Strut Modification 5/6/1987 M1 SN: 2-116
#9-Plastic Spinners 6/9/1987 M1 with 3 Blade Prop and Plastic Spinner
#10-Wing Tank "T" Fittings 8/14/1987 M1 (Prior to Letter)
#11-Wing Tank Recall 8/20/1987 M1 (Prior to March 23, 1987)
#12-1/4" Propeller Bolts 6/30/1988 M1, M2 (Prior to Letter)
#13-Not Used  NA NA
#14-E-33 Aluminum Rear Spinner Bulkheads 12/27/1988 M1, M2 SN: 2-263, 278-281
#15-Wing Tanks, WT-1R and WT-1L and Header 3/27/1989 M1, M2 SN: 2-270
#16-Eletric Starter 6/7/1990 Specific Rotax 503, 532 & 582 Engines (Prior to Letter)
#17-Not Used  NA NA
#18-Preflight Inspection of Rudder Cables 7/22/1991 M1, M2, M3
#19-Oil Injection System 9/3/1991 All Models with Rotax 582 Engines (Prior to letter)
#19A-Oil Injection Systems (Revised) 5/9/1994 All Rotax 2-Stroke Engines
#20-Shock Cords 9/19/1991 M3, M4 (Prior to Letter)
#21-Cotton Flox Micro-Balloons 10/16/1991 M3, M4 SN: 1143-1420
#22-Header Tank and Fuel Line Routing 10/22/1992 All Models using a Header Tank
#23-Dual Brake Braking Problems 12/7/1992 All Models Equipped with Dual Brake Option
#24-Propellar Installation, Torquing Procedures and Maintenance 12/14/1992 All Models
#25-Lift Strut Attachment 3/12/1993 All Models
#25A-Lift Strut Attachment (REVISED)
  1. Wing Dihedral
  2. Lift Strut Adjustment
  1. All non S5 Kitfox's
  2. All Models
#25B-Lift Strut Attachment (REVISED)
  1. Wing Dihedral
  2. Lift Strut Adjustment
  1. All non S5 Kitfox's
  2. All Models
#26-Nose Gear Piston 2/10/1994 S5 Vixen SN: ECV001-LCV023
#27-Airspeed Indicators and Pitot Static System 5/1/1994 Replaced by 27A
#27A-Airspeed Indicators and Pitot Static System (REVISED) 9/7/1994 All Kitfox™ Owners
#28-Sound Absorbing Kit 5/1/1994 All Kitfox's using Rotax 912 with optional pre-sewn sound insulation material installed on the firewall
#29-Vixen Documentation and Upgrade 4/6/1994 All S5 Vixen Owners
#30-Aft CG Limit 5/1/1994 All M4-1200 Models
#30A-Aft CG Limit (REVISED) 9/7/1994 M1, M2, M3, M4, C4

#31-Tail Skid Bushing

8/15/1994 All S5 Vixen 1200# Models
#32-Elevator Push-Pull Tubes 6/23/1994 All S5 Models
#33-Fuel Valve Mounting Bushing 6/24/1994 All S5 Vixen 1200# Models
#34-Series 5 Horizontal Bushing 8/19/1994 All S5 Models
#35-Rotax 582 Choke Control 8/19/1994 M1, M2, M3, M4, C4
#36-Cable Guides 8/22/1994 All S5 Models
#37-Series 5 Wing Folding 8/22/1994 All S5 Models
#38-Elevator Control Stop Bushing 9/12/1994 All S5 Models
#39-Belly Stringer Forward Attach Angle 9/14/1994 All S5 Models 
#40-Bridge Rectifier 11/19/1994 All Models
#41-Charging System 10/19/1994 All Models
#42-Center Firewall Section 11/9/1994 All S5 Engine Kits prior to 11/31/94
#43-Series 5 Speedster Rudder 11/28/1994 All S5 Speedsters
#44-Series 5 Connect Tube Threads 11/29/1994 All S5 Fuselage Kits prior to 11/31/94
#45-Ensuring Proper Fuel System Performance 9/21/1995 All Models with Wing Tanks
#46-Possible Fatigue of Vixen Nose Gear Fork 9/1/1995 All S5 Vixens
#47-Rudder Pedal Torque Tube Cracking 8/22/1995 M1, M2, M3, M4, C4
#48-Welded Landing Gear 8/22/1995 All Taildragger Aircraft with Welded Landing Gear
#49-Rotax Service Bulletins 8/25/1995 All Models Powered by Rotax Engines
#50-Matco M62 Wheel Installation 8/28/1995 Models with Matco W62 Wheels
#51-Series 5 Round Cowl, Rotax 912 Exhaust System 9/11/1995 S5 Models using Round Cowls and Rotax 912 Engines
#52-Pulsar II and III Aircraft 11/23/1998 Pulsar II & III Models
#53-Rotax 912 and 912S Engine Installations (Pulsar)


Pulsar II & III Models
#54-Field Service Report Request


S5 Models

#55-Weight and Balance


S5 Vixen & Voyager