American Champion Aircraft Corporation

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Service & Technical Documents

Service Letter

Subject (Applicability)

Available Formats

C-135

Landing Gear Thru-Bolt and U-Bolt Inspection and Maintenance

C-139

Inspection and Repair for Lose Rib Nails (Wood Spar)

406

Wood Spar Inspection  (Revision A)

417

Optional Inspection Cover Installation (Wood Spar)   (Revision C)

418

Electrical System Update  (Revision A)

419

Fuel Line / Flap Sector Clearance  (7GCBC, 8GCBC)

420

Metal Spar Wing Conversion Guidance  (Revision A)

(Pre 7ECA, older 7 series)

421

Early Model Seat Belt Conversion

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

422

Aluminum Gear Retrofit  (Revision A)

(7ECA, 7GCAA, 7KCAB, 7GCBC, 8KCAB, 8GCBC)

423

Normal Category Gross Weight Increase  (8KCAB)

424

Flap Wing Root Pulley and Cable Inspection  (7GCB, 7GCBC, 8GCBC)

425

Inspection of Toe Brake Cotter Pin

(7ECA, 7GCAA, 7KCAB, 7GCBC, 8KCAB, 8GCBC)

426

Inspection / Upgrade of Wing Tip Wire Attachment  (All Models)

427

Inspection of Nicopress Sleeves (Revision B)

428

Inspection of Repaired Wide Rear Seat

429

Inspection of Stereo Headphone Wiring

430

Conversion of 7ECA, 7GCAA and 7GCBC to Lycoming O-320-B2B

or Equivalently Provisioned Engine per TCDS E-274.

431

Inspection Folding Rear Seat Hinge

432

Inspection Folding Rear Seat Restraint Cable

433

Installation of Front Seat Lap Belts

434

Door Release Pin and Ring

435

Fuselage Inspection for Loose Items

436

Installation Floorboard Extensions or Revised Floorboards

437

One-Time Inspection of Folding Front Seat Bottom

438

Inspection of Fuselage Frame at Main Gear Attachment

439

Airbox Inspection (1974 and Newer)

440

Airbox Inspection (IO-390 and AEIO-390 Engines)

441

Sealed Battery Installation; Also, Global Alternate Method of Compliance

442

Inspection of Aileron Hinge Rib and Support (8KCAB)