SERVICE

LETTERS


A collection of service letters relevant to the Aeronca, Champion, Bellanca, and American Champion aircraft.

SL-1


Modification of 4-928 tail gear



15AC







SL-2


Installation of optional electrical equipment in 7EC Champions



7EC







SL-3


Wing Tip Bow Repair



7A, 7B, 7C, 7D, 7E, 11A, 11B, 11C







SL-4


Removal of the two 10 inch shock rings from the 15AC main landing gear



15AC







SL-6


Repair of landing gear and attach fittings



7AC, 7BCM, 7CCM, 7DC, 11AC, 11BC, 11CC







SL-7


Conversion of Model 15AC landplane to Model S15AC seaplane



15AC







SL-8


Conversion of Model 11CC landplane to Model S11CC seaplane



11CC







SL-9


Conversion of Model 7DC landplane to S7DC seaplane



7DC







SL-10


Approved repair of 2-705 socket and 1-2383 control stick connection tube



7AC, 7BCM, 7CCM, 7DC







SL-11


Factory installation of 1-2565 Bronze Oleo Bushings in 4-541 & 4-10001 Oleo Case Frames










SL-12


Crusing RPM fopr Model 15AC and S15AC airplanes



15AC, S15AC







SL-13


Conversion of Model 7AC to Model 7BCM airplane using a carburetor type engine



7AC







SL-14


Conversion of Model 7AC to Model 7DC airplane using a carburetor type engine



7AC







SL-15


Conversion of Model 7AC to Model 7CCM airplane using a carburetor type engine



7AC







SL-16


Conversion of a Modem 7CCM (carburetor engine) Landplane to a Seaplane



7CCM







SL-17


Conversion of Model 11AC to Model 11BC using a carburetor type engine



11AC







SL-18


Suggested procedure for external painting of Model 15AC wings.



15AC







SL-19


Factory approved repair of elevator and rudder hinges on Models 7AC, 7BCM, 7CCM, 7DC, 11AC, 11BC, 11CC



7AC, 7BCM, 7CCM, 7DC, 11AC, 11BC, 11CC







SL-20


Installation – Instructions - “No Bounce” landing gear oleo assembly



7AC, 7BCM, 7CCM, 7DC, 11AC, 11BC, 11CC







SL-21


Crusing RPM for Model 7CCM and Model S7CCM airplanes



7CCM, S7CCM







SL-22


Improved Model 15AC Firewall Door Catch



15AC







SL-23


Conversion of Model 11BC to Model S11BC



11BC







SL-24


Crusing RPM for Models 7BCM, 7DC, and S7DC airplanes



7BCM, 7DC, S7DC







SL-28


Installation instructions and parts list kit 167 Cabin Heater



7 Series with HW Muffler







SL-29


Conversion of Model 7EC to Model S7EC



7EC







SL-35


Installation Approval of Fiberglass Wing-Tips on Models



7AC, 7BCM, 7CCM, 7DC, 7EC, 7FC







SL-42


Importance of keeping landing gear oleo assemblies at the proper fluid level



All







SL-44


Inspection of Oleo Cylinder lower end braze



7GC, 7EC, 7FC







SL-49


Conversion of Model 7JG to Model 7EC



7JG







SL-51


Landing Gear Oleo axle attachment interchangeability



7AC, 7BCM, 7CCM, 7EC, 7FC, 7KC, 7GC, 7HC, 7GCB, 7GCBA







SL-56


Conversion Champion Model 7AC to 7EC



7AC







SL-61


Basic General Information for Field Approval Personell



7AC, 7BCM, (L16A), 7CCM, (L16B), 7DC, 7EC







SL-65


Use of 5-294 Front Wing Strut on all Model 7 aircraft



All 7 Series







SL-70


Rudder cable pulley lubrication



All 7 Series







SL-72


Front Wing Strut drain hole



All 7 Series







SL-75


Inspection of wing fabric and leading edge skin attachment



All 7 Series







SL-87


Service Publication Index



All 7 Series







SL-88


Service Kit Index



All 7 Series







SL-404


Aileron Hinges



All 7 Series







SL-406a


Wood Spar Inspection



All 7, 8, 11 Series

(with wood spars)







SL-417c


Installation of Inspection Covers for Wood Spar Inspection



All 7, 8, 11 Series

(with wood spars)







SL-418a


Electrical System Update










SL-419


Inspection of Fuel Line near flap quadrant



7GCB, 7GCBC, and 8GCBC







SL-420a


Metal Spar Wing Installation on older models



7AC, 7BCM, 7CCM, 7DC, 7EC, 7FC, 7GC, 7HC, 7GCA, 7JC, 7KC, 7GCB and 7GCBA







SL-422a


Aluminum Gear Retrofit



7ECA, 7GCAA, 7GCBC, 7KCAB, 8KCAB, 8GCBC







SL-423


Optional 8KCAB Normal Category Gross Weight Increase



8KCAB







SL-424


Inspection of Flap Wing Root Pulley and Cable



7GCB, 7GCBC, 8GCBC







SL-425


Inspection of Brake Cotter Pin



7ECA, 7GCAA, 7GCBC, 7KCAB, 8KCAB, and8GCBC

SL-426


Inspection/Upgrade of Wing Tip Navigational Wires



Bellanca/Champion







SL-427b


Inspection of Nicopress Sleeves



7ECA, 7GCAA, 7GCBC, 8KCAB and 8GCBC







SL-428


Inspection of Repaired Wide Rear Seat










SL-429


Inspection of Stereo Headphone Wiring



7EC, 7ECA, 7GCAA, 7GCBC, 8KCAB and 8GCBC







SL-430a


Conversion of 7ECA, 7GCAA and 7GCBC to Lycoming O-320-B2B or Equivalently Provisioned Engine per TCDS E-274



7ECA, 1974 Models and Up, 7GCAA and 7GCBC, 1974 to 1980 Models