AME Unit 8 Corrosion
Terms
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- Types of inspections
-
Preflight, Postflight, Turnaround, Daily, Special,
Conditional, Phase, Acceptance, Transfer - Purpose of aircraft inspections?
- To achieve maximum aircraft readiness and safety through preventative maintenance.
- Highest Priority components to remove during Emergency Reclamation
- Avionics, electrical, and ordnance equipment. Magnesium parts are particularly susceptible to corrosion.
- Maintenance control coordinates
- Salvage Operations
- Purpose of Emergency Reclamation.
- Used to prevent further damage.
- Corrosion Prone Areas on Ejection Seat.
- Time Release mechanism (TRM), Drogue Gun, Guillotine Breech assembly, Guillotine Cutter assembly, Inertia reel assembly, Rocket motor initiator assembly, main beam, seat bucket
- Galvanic metals with high susceptance to corrosion.
- Anodic
- Galvanic metals with Low susceptance to corrosion
- Cathodic
- During all Cleaning operations you shall ______ the aircraft
- Ground
- Internal or residual stresses are produced by_______
- Cold working, forming, and heat treatment operations during manufacture of parts
- Elliminatoin of this condition is most effective for stoping corrosion.
- Electrolytes
- Disposal of HAZMAT shall be accomplished in a manner that will not result in the violation of what?
- Local, state, or federal pollution criteria
- The NAMTRAGRUDET course is a prerequisite for cources taught at______
- NADEP
- All Warnings and cautions listed must be strictly adhered to______
- HAZMAT
- Naval publication for corrosion
- NAVAIR 01-1A-509
- How many chapters are in NAVAIR 01-1A-509?
- 9
- Corrosion Control Program is required by?
- OPNAVINST 4790.2
- Paint is removed using what means?
- Paint is removed using Mildest means avaliable.
- Do not use Cleaner, lubricant, and preservative (CLP) on what?
- Rubber O-Rings or other elastomeric parts.
-
CPC (Non water displacing) solvent cutback.
2 types: - Grade 2 and Grade 4
- Recommended Cleaners have a PH of What?
- PH of 7.5-10. PH greater then 10 is unauthorized.
- Dry cleaning solvent is _______ and its Vapors are _______
- Solvent is flammable and vapors are Toxic
- only use solvents in what type of area?
- Well ventilated areas.
- Care must be exercised when using these types of tools
- Power tools
- Metallic wools must be what?
- Galvanically compatible with surface being treated.
- When removing persistent paints only use
- Non Metallic materials
- Never use over age paint remover on
- High strenght steel aircraft parts or structural fittings.
-
Repair of corroded areas:
Use these 4 procedures - Paint removal, corrosion removal, surface treatment, paint touch up procedures.
- Fluorescent Penetrant inspections are performed by who?
- NonDestructional Inspectoin (NDI) qualified and certified personnel ONLY
-
Purple K powder (PKP)
What is proper Nomenclature - Potasium BiCarbonate
- Only mix materials from
- the same manufacturer
- Always wear what during all paint mixing, touch up and spraying operations?
- PPE. Personal protective equipment.
- Dust generated by machines must always be.
- vacuumed not blown.
- what are Fibers?
- 3-4 microns diameter, .004 inch length. will easily penetrate lugh halls.
- Corrosion prone areas common to all aircraft
- Steel fasteners, Fraying surfaces and crevices, spot-welding assemblies, exhaust impingement areas, wheel wells and landing gear, Hinges, relief tube outlets, water entrapment and bilge areas, battery compartment, magnesium products, electrical connectors, corrosion removal and surface treatment.
- Cadmium rust.. when it rusts to protect the underlying metal, the rust is described as
- Mottling
- AVGFE
- Aviation Gas Free Engineer.
- Who certifies that an aircraft is fire and explosion safe after a fuel cells has been ruptured?
- Aviation Gas Free Engineer (AVGFE)
- How many levels of Preservation are there?
- 4
- What are the 4 levels of Preservation?
-
level I-90 days
Level II-1year
Level III-indefinite time.
and Desert storage. - Who must be present while painting?
- Industrial Hygenist
- Room Temperature Vulcanizing (RTV)
- If it smells like Vinigar DONT USE IT!
- what is NAVAIR 15-01-500
- Preservation of Naval Aircraft
- What are the 9 chapters of NAVAIR 01-1A-509?
-
1.Intro
2.Corrosion Theory, 3.Preventive Maintenance
4.Inspection and corrosion Prone Areas
5.Corrosion removal and surface treatment
6.sealents
7.paint finish and touch-up
8.treatment of specific areas 9.Emergency procedures - Do not use what with solvents that have a flashpoint below 100 degrees F?
- Synthetic wiping cloth
- Static vents are not to be what?
- fouled by adhesive tape transfer.
- Prevention and control of corrosion on aircraft is who's responsibility?
- Commands responsibility
- Do not use aluminum conversion coating as a substitute prepain treatment for what?
- Magnesium conversion coating.
- Chemical conversion coatings are toxic and contain what?
- Chromic acid dust. It can cause burns, irritation and ulcers.
- Who can apply and handle sealants?
- Qualified personnel only.
- Elastomeric coatings should be repaired IAW?
- NAVAIR 01-1A-22
- What should be worn durning scuff sanding or grinding?
- Goggles and respirator.
- Scuff sanding with proper toos to a depth greater then necessary can result in what?
- Corrosion due to penetration of the paint and exposure of the metal.
- Repainting solely for ______ shall not be done
- Cosmetic appearance.
- If primer has dried over night, ____ ____ surface, clean with cotton______ dampened with thinner and apply a thin coat of _____ primer.
- Scuff sand surface, cotton cheesecloth, and epoxy primer.
- Do not use zinc chromate primer on exterior aircraft surfaces, including wheel wells, and wing bitts, and in areas exposed to what?
- temperatures exceeding 175 degrees Fahrenheit.
- What is required to wear during mixing or painting in confined spaces?
- Supplied air respirator.
- Who prepares a list of equipment indicating removal priority?
- Maintenance officer
- under emergency, who assumes responsibility for minimizing damage?
- all personnel.
- after emergency reclamation is complete, a logbook entry should be made indicating what?
- Affected areas.
- Presence of corrosion on the rocket motor is cause for what?
- rejection.
- ________ may overcome personnel before thay are aware of their presence.
- Fumes.
- Electric motors are required to be ____ ____ and static grounded when working with composites, Especially graphite
- Explosion proof.