AMT A161: Airframe Sheet Metal & Composite Structural Repair - FAA
Item | Value |
---|---|
Curriculum Committee Approval Date | 12/08/2021 |
Top Code | 095050 - Aircraft Fabrication |
Units | 5.5 Total Units |
Hours | 198 Total Hours (Lecture Hours 54; Lab Hours 144) |
Total Outside of Class Hours | 0 |
Course Credit Status | Credit: Degree Applicable (D) |
Material Fee | Yes |
Basic Skills | Not Basic Skills (N) |
Repeatable | No |
Open Entry/Open Exit | No |
Grading Policy | Standard Letter (S) |
Course Description
Fundamental theory relating to aircraft structures. Practical experience in sheet metal, composites, wood, riveting, fabric, inspection, and painting. ADVISORY: AMT A153. Transfer Credit: CSU.
Course Level Student Learning Outcome(s)
- Identify, repair and inspect wood structures.
- Repair, inspect and test fabric covering materials.
- Apply paint to surfaces, letters and numbers, and recognize defects in paint application.
- Select rivets and fabric parts, and repair airframe structures using both metallic and nonmetallic methods.
- Inspect, check, service and repair aircraft windows, doors and interiors.
Course Objectives
- 1. Interpret the information contained in AC 43.13-1 and select those samples of wood that would be acceptable for repair of wood aircraft structures
- 2. Interpret information pertaining to the effect of moisture on the size and strength of wood structural members.
- 3. Identify substitute species of wood that exceed the strength properties of aircraft spruce.
- 4. Describe the preparation of wood surfaces for gluing, the types and characteristics of acceptable glues, spreading of glues, assembly time in gluing, gluing pressures and methods of applying pressures.
- 5. Locate information applicable to the scarf splice joints described in AC 43.13-1. He will read the diagrams and drawings and apply the dimensions to sketches of typical wood structural repairs.
- 6. Describe the procedures and methods of repairing elongated bolt holes in wood spars.
- 7. Recognize acceptable finishes
- 8. Describing the materials and procedures approved to seal wood aircraft structures
- 9. Identify the correct fabric to be used in covering an aircraft when the airspeed and wing loading is specified
- 10. Inspect a fabric covered aircraft structure, and identify the areas most susceptible to corrosion.
- 11. Inspect a fiberglass covered aircraft, structure and identify worn and delaminated area.
- 12. Apply dope by brush and spray application.
- 13. Prepare the surfaces for painting and apply primers, and paints by spraying.
- 14. Select twenty different aircraft rivets and identify each rivet by head style, alloy diameter and length of shank.
- 15. Inspect riveted splices and joints, of the type used in aircraft skin and structure, to identify rivets which are faulty.
- 16. Inspect the drilled holes and indicate acceptability of each hole, giving reasons for those rejected.
- 17. Select as specified, ten different numbered drills, five different lettered drills, and two types of countersinks. He will use suitable drilling equipment to drill five holes with each selected size of drill. At least five holes will be drilled in each of the following kinds of material: soft aluminum castings and sheet, aluminum alloy thin skin and structural parts, steel alloy, stainless steel or titanium sheet. He will countersink five holes each for flush rivets and flush screws or bolts.
- 18. Identify scratches repairable by burning and burnish one or more scratches in sheet metal of the type used for aircraft skin.
- 19. Determine the next larger size rivet and what diameter hole it requires, ream the hole, and obtain, by measurement, a hole of correct size for the rivet selected.
- 20. Determine the type of corrosion protection required for assembly of five different dissimilar pairs of aircraft type metals and list the type of coating to be applied to each pair selected
- 21. Perform repairs for the following real or introduced damage: a hole in a stressed-skin metal section of damaged skin (using a single lap sheet splice), damaged stringers on the lower surface of a stressed-skin metal wing.
- 22. Repair a damaged section in an aircraft sheet metal structural unit. He will determine the type and size of repair splice or patch for the section, plan and layout the rivet patterns, select proper number and types of rivets required and use proper riveting techniques in making the repairs.
- 23. Will inspect the skin, rivets, and structural members for evidence of damage. He will list any popped or sheared rivets, wrinkled or distorted skin areas, misaligned or cracked structural members and any other evidence of overload.
- 24. Layout, cut, and drill two sections of aluminum alloy for a joint which is to be made watertight. Sealant will be applied and the joint will be constructed by riveting the two sections together in a watertight joint. Test will be made to assure that the joint will not leak under water pressures.
- 25. Identify and label ten samples of different plastics, fiber, and fiberglass, including honeycomb and laminated fiberglass structure materials.
- 26. Inspect and test given samples with visual, coin-tap and ultrasonic equipment.
- 27. Inspect and check the pressure seal and latching mechanism in an externally opening entrance door or cockpit for a pressurized aircraft, remove, inspect and replace a pressure seal window in a window frame or escape hatch of a pressurized aircraft, inspect, check and adjust as needed, the adjusting mechanism of an aircraft seat with automatic return and inspect and check a safety belt installation for being acceptable to FAA standards.
Lecture Content
WOOD STRUCTURES Identify wood defects Identify defects in wood samples Inspect wood structures Identify kinds of wood Illustrate the effects of shrinkage Service and repair wood structures Judge the suitability of substitute materials Describe the kinds of glues and gluing techniques Read drawings pertaining to repair of wood structures Repair of elongated bolt hold Identify protective finishes AIRCRAFT COVERINGS Select and apply fabric and fiberglass covering materials Identify fabrics and seams and describe methods of applying fabric Inspect, test and repair fiberglass Inspect and test fabric covering AIRCRAFT FINISHES Apply trim letters and touch-up paint Draw registration numbers and describe the application of trim designs Identify finishing materials and thinners Apply finishing materials Spray primers and paints Inspect finishes and identify defects Inspect finishes and recognize defects SHEET METAL STRUCTURES Install conventional rivets Identify conventional aircraft rivets Perform riveting to FAA specifications Identify, remove and replace improperly installed rivets Select, install and remove special fasteners for metallic, bonded and composite structure Aircraft types of special rivets and fasteners Select acceptable holes and install Hishen rivets, blind rivets and deicer boast fasteners Remove and replace special rivets and fasteners Form, layout and bend sheet metal Make a joggle in aluminum sheets Prepare a layout for a bend in aircraft sheet metal li> Layout and make bends in sheet metal Form aluminum parts by bumping Inspect and repair sheet metal structures Select and use twist drills and countersinks Select and use hand files for soft metals Repair shallow scratches in sheet metal Repair a slightly oversize hole by reaming for next larger size rivet Prepare dissimilar metals for assembly Describe loads in fuselage and wing structures and types of overload failure Repairs to stressed skin airplane wings Repair aircraft structural units built from sheet metal Determine condition of stressed skin structures which have been critically loaded Construct a watertight joint Inspect bonded structure Inspect and repair sandwich structures Evaluate damage to bonded structure and determine type of repair needed Inspect, test, and repair fiberglass, plastics, honeycomb composites, and laminated primary and secondary structures Identify and repair plastic, and fiberglass aircraft materials Repair damaged areas in fiberglass aircraft structures Inspect, check, service and repair windows, doors and interior furnishings Recognize distinguishing characteristics of transparent plastic and plate glass enclosures Clean, protect, and repair and secure transparent plastic aircraft enclosures Inspect and check pressure seal doors and windows, seat mechanisms and safety belt installations
Lab Content
Faculty input required.
Method(s) of Instruction
- Lecture (02)
- Lab (04)
Instructional Techniques
1. Detailed multimedia/lectures of each topic covered. 2. Student feedback during each lecture. 3. Detailed illustrative discussion of textbook examples. 4. Concentration on schematic reading and system operation fault diagnosis. 5 Practical troubleshooting. 6. Laboratory exercises pertaining to subjects discussed during which students work individually or in small groups.
Reading Assignments
.
Writing Assignments
Student must show proficiency in writing logbook entries using correct punctuation, sentence structure and readability.
Out-of-class Assignments
.
Demonstration of Critical Thinking
Interview, list, multiple choice exams, and short answer, small group oral examinations.
Required Writing, Problem Solving, Skills Demonstration
Student must show proficiency in writing logbook entries using correct punctuation, sentence structure and readability.
Textbooks Resources
1. Required Jeppesen. AC43.13-1B&2A, Acceptable Methods, Techniques, and Practices-Aircraft Inspection and Repair, ed. Superintendent of Documents; U.S. Government Printing Office, 2001 Rationale: - 2. Required Jeppesen. A&P Technician ?AIRFRAME? Textbook, ed. Englewood: Jeppesen Sanderson, 2007 3. Required Jeppensen. A&P Technician ?GENERAL? Textbook, ed. Englewood: Jeppesen Sanderson, 2000 Rationale: latest 4. Required Kroes, Michael J., et al. . Aircraft Maintenance & Repair, 6th ed. New York: Glencoe/McGraw-Hi, 2007