preservation Flashcards by kristen ludwig

LEVEL I PRESERVATION

This preservation
level is recommended for short term protection
(90 days or less) and is the baseline for all subsequent
preservation levels.

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LEVEL II PRESERVATION

This level removes selected systems from operational condition and preserves them for a storage period up to 1 year

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LEVEL III PRESERVATION

This is the highest level of aircraft and aircraft system preservation. It affords the best protection for an indefinite period of time.

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LEVEL IV PRESERVATION

is an umbrella preservation status for aircraft undergoing depot-level repair. Instead of preserving the entire aircraft in one level of preservation, systems and components may be in various levels of preservation dependent on the requirements of the repair cycle

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When the decision is made to remove an aircraft from active service, it may be placed in ___________with the Aerospace Maintenance and Regeneration Group (AMARG) located at Davis Monthan Air Force Base, Arizona

desert storage

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This type of storage is not recommended for aircraft intended to be reintroduced back into the fleet

desert storage

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Aircraft and removed aircraft components to be shipped must be protected in accordance with the requirements for ______or_______preservation

Level II or Level IIl

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The basic foundation of Level _______ protection is to ensure all systems are kept free of water and fluids are topped off. Spray or brush-on thin corrosion preventive compounds are applied to bare surfaces to provide a chemical barrier separating metal from moisture. Water and foreign object intrusion areas are sealed with tape and barrier (T&B) material and protective covers.

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Perform a ________ prior to and the day after the arrival of a storm. Storm conditions are winds over __ knots.

Storm inspection, 35

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With the application of longer lasting protection to selected systems and components. The barrier system for Level __ preservation ranges from a broader use of T&B material to the application of a top cover, with the option of shrinkwrap or strippable coating for shipment of aircraft only

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Apply a thin film of ____________, to arresting gear, landing gear, wing fold, tailskid and all exposed portions of reciprocating rods

hydraulic fluid, MIL-PRF-83282

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Level ___protection requires modified Level II procedures with the addition of dehumidification. The barrier system for Level _____ preservation includes the flexible bag, the drop shroud and the rigid shelter. The time limitation of the preservation cycle is dependent on the barrier system renewal requirement.

III, III

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Check humidity indicators. Initiate corrective action if humidity exceeds __% RH

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Aircraft to be shipped shall be protected in accordance with _____or______preservation requirements

Level II or Level III

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Strippable coating or shrinkwrap shall be removed within __ days of application (including time during shipment) or within __ days of receipt of aircraft, whichever is sooner

60, 5

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Carefully clean elastomeric portions and embedded or attached conductors of EMI seals with _______

isopropyl alcohol, TT-I-735

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PNEUMATICS: If water is found, completely bleed the system of all air, service chemical air driers, fill system with ____________, and recheck for water

dry nitrogen, A-A-59503 Type I

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When pneumatic systems are partially disassembled during maintenance or storage, blank off all openings, including chemical air driers using _________________and _____, NAS 847, or ___________, MIL-PRF-131 Class 1, and_____, SAE AMS-T-22085

non-shedding threaded type caps and plugs, barrier material and tape

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Serious damage can occur to elastomeric parts and engine in-flight failures may result if fuel systems are left drained of fuel and unprotected for longer than ___ hours

72 HOURS

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Observe starter limitations during this operation. Allow a fuel soak period of at least ___ hours for the metering devices before starting the engine

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What level do you remove floatation bags and CAD inflation device and store in accordance with NAVAIR 11-100-1.1-CD. Dry and dust with talc, A-A-59303

Level II and III.

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Store flotation gear in ______ aircraft

PARENT

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Prior to any preservation activities, all CADS in flotation gear shall be made safe by ______

AUTHORIZED PERSONNEL

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Some liquid oxygen converters are peculiar to a particular aircraft. Such converters cannot be installed in another aircraft without extensive modification of the system. These non-interchangeable converters shall not be separated from ___________

PARENT AIRCRAFT

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Cylinders which have been open to atmosphere or voided of oxygen (to less than __ psig) shall be removed from service and subjected to heat vacuum treatment before recharging.

Bleed portable oxygen cylinders to __ psi (for low pressure type) or __ psi (for high pressure type) and leave on aircraft

25, 50

Bleed low and high fixed-type oxygen cylinders to approximately ____ psi

100

Shut off all cylinders at __________ or disconnect lines at self-opening valves located on or near cylinders. Cap all openings with ___________or_________as applicable

manual shut off, pressure type caps or plugs

Level II. Protect in accordance with Level I requirements plus preserve oxygen system regulators by covering regulator openings and connections with __________, MIL-PRF-131 Class 1, held in place with _____, SAE AMS-T-22085 Type II

barrier material, tape

Level I, II and III. Every ___ days, check packaged oxygen bottles for water damage. Remove oxygen bottles for rework if pressure has dropped below ___ psi.

7, 10

If the system was disconnected during maintenance or storage, purge with____________, A-A-59503 Type I, between the concentrator and the survival kit manifold. The temperature at the inlet to the system should not exceed ______°F during purging. The purging procedures shall continue until the distribution terminals in the cockpit are warm to the touch (150°F), then continue to purge for an additional ____ minutes.

hot dry nitrogen, 250, 10

When a parachute assembly must be packed under unfavorable conditions, provisions shall be made to protect it from possible damage and excessive humidity. In no case shall the parachute assembly be interrupted after the packing operation has been started. If the packing operation is interrupted due to unforeseen circumstances, the parachute assembly shall be ___________

completely repacked

When portable fire extinguishers are left in aircraft, bottles shall be maintained in _________ condition. Observe the ____year test requirements of DOT regulations for compressed gas cylinders.

a fully charged, ready to use, 5

Fabric portions of seat belts, shoulder harnesses and inertia reels shall be cleaned to remove light soil and oil spots. Sponge clean using cleaning solution (1 part MIL-D-16791 Type I in 16 parts water or 1 part MIL-PRF-85570 Type II in 4 parts water). Rinse with a clean, damp rag or sponge. Webbing exposed to salt water shall be washed in _______

fresh water.

If fungal growth is detected on rubber wiper blades, wipe blades with clean ___________, CCC-C-440, saturated with __________

cheesecloth, isopropyl alcohol

Oxygen system components shall not be exposed to ____________ or to any other materials not specifically designated for use on oxygen systems

HYDROCARBONS

hydrocarbons?

(oils, greases, fuels and preservatives)

Whenever possible, parachutes packaged for indefinite storage shall be packed and stored in a ______or______ condition

loosely folded or "fluffed"

Pressure Sensitive Tape. Noncorrosive tapes conforming to SAE AMS-T-22085 shall be used for all preservation operations such as closing of openings to exclude foreign matter, attaching ________and______and_________. When using approved tapes for preservation and packaging, do not apply tape directly to machine finished bare metal surfaces or transparent acrylics. Select an adjacent noncritical painted surface for attachment

barrier material and tags and securing cushioning material

Masking Tape. Paper masking tapes shall not be used for preservation or packaging except for temporary _________________during assembly, or when specifically authorized by an engineering directive for a special situation

holding of setup box segments

Because paper masking tapes are corrosive under certain conditions, they shall be removed from all _________ surfaces before items are packaged and before adhesion has built up to the point where tape removal is difficult or adhesive transfer results

metallic

masking tapes shall be removed no later than the next consecutive work shift after painting is complete or within ____ hours, whichever is sooner.

Seals, caps and plugs used in fuel, lubricating oil, and hydraulic systems shall be designed to positively seal against loss or leakage of fluids under an internal pressure of ___ psig.

2-5

Packing methods: Preservation coating, wrap and cushioning within a heat sealed, watervaporproof barrier bag. This method provides water vapor protection.

Method 40

Packing methods: Preservative coating, wrap and cushioning within a heat sealed greaseproof and waterproof barrier bag. This method provides protection from both oil and water intrusion

Method 30

Packing methods: Same as Method 40 except for the addition of desiccant inside of the heat sealed bag. This method provides the highest degree of water vapor protection for delicate or corrosion sensitive items.

Method 50

Any box over ______ pounds shall be skid mounted or shipped on a pallet

200

_______________can be used for individual aircraft or for an entire shelter where many aircraft and components can be protected.

Dehumidified (DH) Storage

what level is Dehumidified (DH) Storage?

Level III

3 types of Dehumidified (DH) Storage?

Rigid, Shroud, and Bag

___________is with the top cover, shippable coating, and tape and barrier methods, provides limited protection for the aircraft and components, and requires periodic represervation and maintenance of CPCs to sustain the protection.

Nondehumidified Storage

what level is Nondehumidified Storage

Level I and II

4 types of Nondehumidified Storage?

Top Cover, Strippable Coating, Tape & Barrier, Shrinkwrap

If cartridge activated devices and/or rocket motor escape devices are not removed before preservation, one of the Warnings in Figure 3-2 shall be applied to each side of the cockpit area. Lettering shall be_____and a minimum of __ inch in height

red, 1

Shelter: Hangers, metal sheds, buildings, preengineered metal buildings, and tension fabric shelters have been successfully dehumidified to Level III standards provided the walls, ceiling, doors and floor are adequately sealed

Rigid shelter

Shelter: The material can be supported, draped over a floor mounted framework, hung from a suspended rigid frame, or unsupported (draped over preserved item like a blanket). developed to fill a niche in DH protection technology

Drop shroud

The two basic types of flexible covers are_____and _____covers

bags and top

is used to protect aircraft during Level II preservation. It is most familiar as the white cocoon covering on aircraft being shipped (see Figure 5-12). This coating shall be used only for shipment of aircraft/components and is not recommended for storage.

Strippable coating

____________ provides protection against the entrance of dust, dirt, FOD, moisture, animals and insects. It also protects aircraft surfaces from the effects of blowing sand, debris, sunlight (UV) and environmental fallout

Tape and Barrier Material (T&B)

a low density polyethylene (LDPE) film made from low melt resin. Used to protect aircraft or components during Level II preservation (see Figure 5-21). It shall be used only for shipment and is not recommended for storage.

Shrinkwrap

_________ cannot be used to ground aircraft. A separate grounding cable must be used

Tiedown chains

The preferred wheel chocks for land based aircraft are those made from ___________

polyurethane

The wheel chocks are available in ____ different sizes according to the dash number after the P/N: -1 for wheels __ to a 33 inch diameter, -2 over ____ inches in diameter, and -3 for dual or tandem main landing gear. Refer to NAVAIR 17-1-537 for additional information

three, up, 33

Material Defect Indications: Dirt, chemicals, debris.

Contamination

Material Defect Indications: Intense and localized corrosion within crevices or other shielded areas on metal surfaces, such as holes, gasket surfaces, lap joints, surface deposits, bolt and rivet heads. This type of attack is usually associated with trapped moisture.

Crevice Corrosion

Material Defect Indications: Usually found in and around metal fasteners. It appears as metal "flaking" or lifting up from the parent material. Occurs in high strength aluminum and magnesium parts

Exfoliation Corrosion

Material Defect Indications: Wormlike traces of corrosion products beneath the paint. Can occur on steels, aluminum and magnesium.

Filiform Corrosion

Material Defect Indications: Attachment of two different metals with corrosion product buildup at the joint between the metals

Galvanic Corrosion

Material Defect Indications: Corrosion of iron or iron-base alloys result in the formation of corrosion products (oxide) on the surface that appear reddish-brown in color. Corrosion of aluminum and its alloys results in white oxides

General Corrosion

Material Defect Indications: Corrosion within the grain structure of the material. Hard to identify by visual inspection, but may look like sand grains in the crack surface

Intergranular Corrosion

Material Defect Indications: First noticeable as a white or grey powdery deposit similar to dust. When deposits are cleaned away, tiny pits or holes are seen on the metal surface. Most common corrosion in aluminum or magnesium

Pitting Corrosion

Material Defect Indications: Mild: General dulling or etching of the metal surface. Advanced: Rough and possibly frosted appearance of the metal surface

Uniform Surface Corrosion

Material Defect Indications: Break in a paint film or coating with the underlying material exposed. Separation of metal surface along a narrow path

Cracking

Material Defect Indications: Loss of plating, paint, or parent metal.

Erosion

Material Defect Indications: Fine cracks in paint, or distortion of part.

Fatigue

Material Defect Indications: Loaded surfaces in contact with each other subjected to vibration and slip. It appears as pits, grooves or black streaks at the contact areas of the materials. A red or black powder is often present.

Fretting

Material Defect Indications: Broken or worn wires in cables, loss of CPC or oil coating

Fraying

Material Defect Indications: Biological growth and possible musty, rancid odor

Mildew

Material Defect Indications: Actual wetness or water marks (deposits)

Moisture

Material Defect Indications: Partially adherent layers of corrosion products on metal surfaces. Usually found on engines or other high temperature parts

Scaling

Material Defect Indications: Refer to NAVAIR _________ for additional information and examples

01-1A-509-1

Wiping down struts?

MIL-PRF-83282 Fluid, Hydraulic

Level I is the most basic preservation. Systems are kept clean and free of water, and fluids are?

maintained full

How long is Type I preservation good for?

Aircraft may be maintained in Level I preservation | for a maximum of 90 days.

What is Type II preservation,Systems are kept clean and free of water, and fluids are maintained full In addition, selected systems are

DRAINED

Level II preservation provides | minimum protection for up to?

one year

Aircraft undergoing depot level maintenance actions are in preservation level?

Level IV preservation

Removed engines and APUs shall be | protected in accordance with Level ?

II or Level III

Engines shall be preserved within ?? days of the last engine run. Removed engines shall be stored indoors. Level I preservation is not recommended for removed engines unless they will be reinstalled within 28 days.

Check fuel level, maintain 95% | full. Check barrier material and repair or replace if torn

Engines Level I. 7 day. Check

Install engine on test stand or aircraft. Hot run the engine and cycle systems, including afterburner, twice. Inspect and renew CPC coatings if required.

Engine level I 28 day.

Level I. Keep fuel systems at least 95% of fuel. Seal seams and openings of engine, except compressor inlet and exhaust outlet, using barrier material, MIL‑PRF‑131 Class 1,

Operational Engine Protection.

Check humidity card. If humidity exceeds 40%, replace desiccant. Inspect barrier material and closures for tears or damage. Repair or replace barrier material and closures as required.

Engine Level II. 7 day. check

28 day. Inspect and renew CPC coatings | if required.

Engine Level II. 28 day check