G
What are the three main methods through which a hazardous material can enter the body?
Direct contact, inhalation, ingestion.
REFERENCE: TM 1-1500-204-23-11, page 2-3, paragraph 2-3. a. (2) (a) 1.
If no technical data is present, how much resin is required for each square foot of dry fabric?
25 grams.
REFRENCE: TM 1-1500-204-23-11, page 6-48, paragraph 6-17. c. (2).
What happens if you do not separate the thermocouple where they exit the vacuum bag?
EM 0284, TM 1-1520-280-23&P AIRFRAME MAINTENANCE
PROCEDURES/MAINTENANCE PROCEDURES/AIRFRAME/AIRFRAME REPAIR
PROCEDURES/Outboard Stabilator Composite Structure Repair - Vacuum Bag and
Cure Procedure CAUTION #3.
What does a downdraft table do?
Draws contaminants away from operator’s breathing zone and assists with housekeeping.
REFERENCE: TM 1-1500-204-23-11, page 3-1, paragraph 3-2 a.
Why is paint removal important?
Because the paint to laminate bond is considerably weaker than the
adhesive to laminate bond.
REFERENCE: TM 1-1500-204-23-11, page 6-1, para. 6-2.
Which type of bonded joint can result in joints as strong as the original part?
Scarf or step bonded joint.
REFERENCE: TM 1-1500-204-23-11, page 6-29, paragraph 6-15.c (3).
How much wire mesh should be exposed around the repair area?
1”.
REFERENCE: TM 1-1520-280-23&P AIRFRAME MAINTENANCE PROCEDURES
/MAINTENANCE PROCEDURES/AIRFRAME/AIRFRAME REPAIR PROCEDURES
/Outboard Stabilator Composite Structure Repair - Restore Electromagnetic
Interference (EMI) Shielding/Lightning Strike Protection (Copper Mesh) Step 1.e.
When using a router, in which direction should you cut?
In the direction the cutter turns.
REFERENCE: TM 1-1500-204-23-11, page 3-4, paragraph 3-4 c.
To mix a total of 50 grams of EA 956, how much of Part A and Part B is required?
32 grams of Part A and 18 grams of Part B.53
REFERENCE: TM 1-1500-204-23-11, page 6-49, Figure 6-29, Example 2.
What size holes are drilled at each end of the disbond?
1/8-inch Diameter.
REFERENCE: TM 1-1500-204-23-11, Pg. 7-66, Para. 7-8 h (2) (d).
What type of material is the lightning strike protection made of?
Aluminum or copper mesh, or aluminum foil.
REFERENCE: TM 1-1520-280-23&P AIRFRAME MAINTENANCE PROCEDURES
/MAINTENANCE PROCEDURES/AIRFRAME/AIRFRAME REPAIR PROCEDU
What is a sandwich construction?
Structure consisting of two faces skins separated by a lightweight core material.
REFERENCE: TM 1-1500-204-23-11, page 4-2, paragraph 4-1 e.
What PSI should the sealant gun be placed at when injecting adhesive?
20 PSI.
REFERENCE: TM 1-1500-204-23-11, Pg. 7-68, Para. 7-8 h (2) (j) 3.
What are the disadvantages of the external bond patch?
Creates eccentric load path caused by offset of the neutral axes of the part and the patch which can cause interlaminar failure of the part or the patch and premature failure of the adhesive.
REFERENCE: TM 1-1500-204-23-11, page 6-28, paragraph 6-15. c. (1).
What is the difference between a thermoset and a thermoplastic?
Thermoset takes a permanent set or shape when cured; thermoplastic can be reshaped or reformed after the part has been processed or consolidated by reheating.
REFERENCE: TM 1-1500-204-23-11, page 4-1, paragraph 4-1. a.
Which type of repair joint is the most common and easiest to machine?
Blunt cut.
REFERENCE: TM 1-1500-204-23-11, page 6-27, paragraph 6-15. a.
When removing damage to the far-side laminate, how much larger is dimension B than dimension A?
A = Damage removal dimension
B = A x 1.7
Dimension B is 1.7 times larger.
REFERENCE: TM 1-1520-280-23&P AIRFRAME MAINTENANCE PROCEDURES
/MAINTENANCE PROCEDURES/AIRFRAME/AIRFRAME REPAIR PROCEDURES
/Outboard Stabilator Composite Structure Repair - Remove Damage from Solid
Laminates and Honeycomb Structure, Table 1. Damage Removal Dimensions in
Inches.
What are the two methods of wet lay-up?
Dry Cloth Impregnation and Vacuum Assisted Impregnation.
REFERENCE: TM 1-1500-204-23-11, PDF 157 and 161.
What is cross-linking?
A chemical reaction which bonds the molecules of two-part resins
together.
REFERENCE: TM 1-1500-204-23-11, page 4-12, paragraph 4-4. c.
How much larger is the backup patch than the area removed from the laminate?
C = A + 0.5
D = B + 0.5
0.5 inches in length and width
REFERENCE: TM 1-1520-280-23&P AIRFRAME MAINTENANCE PROCEDURES
/MAINTENANCE PROCEDURES/AIRFRAME/AIRFRAME REPAIR PROCEDURES
/Outboard Stabilator Composite Structure Repair - Remove Damage from Solid
Laminates and Honeycomb Structure, Table 1. Damage Removal Dimensions in
Inches.
After sanding, what should the level of the adhesive be with the surrounding structure in inches?
± 0.020 in.
REFERENCE: TM 1-1520-280-23&P AIRFRAME MAINTENANCE PROCEDURES
/MAINTENANCE PROCEDURES/AIRFRAME/AIRFRAME REPAIR PROCEDURES
/Outboard Stabilator Composite Structure Repair - Composite Skin Repair QA Step
7.
Which fibers are used in determining ply orientation?
The warp fibers.
REFERENCE: TM 1-1500-204-23-11, PDF 107.
How can core be spoiled?
Core can be spoiled by sharpening the short leg of an Allen wrench.
REFERENCE: TM 1-1500-204-23-11, page 6-26.
What is the laminate 0-degree fiber direction?
Coincides with primary load direction.
REFERENCE: TM 1-1500-204-23-11, PDF 107.
What repair method is used to repair minor damage to fastener holes that extends through the full thickness of the laminate?
Potting Method.
REFERENCE: TM 1-1500-204-23-11, Pg. 7-85, Para 7-10, PDF 299.