当前位置：文档库 › ATA 20

ATA 20

ATA 20 Standard Practices & material information

1 - Sealants, types and curing-times. UPDATED !

2 - All BMS- numbers with description.

3 - Technical terms to describe inspection-findings.

4 - List of P/N versus spec & description BMS/GREASE etc.

5 - Complete Aeroshell book available for reference only.

6 - Shell product specification sheets overview (fuel - oil - grease - hydraulics).

7 - BP Turbo Oil lubricants brochures (oil).

8 - Cross reference BMS- / MIL- spec to productname. Additions Welcome!!

9 - BINAIRY - HEXADECIMAL - DECIMAL - OCTAL converter.

10 - All info on PR 1776 Class B sealant.

11 - Oversize press fit type lube fittings.

12 - Dow Corning RTV adhesive / sealant product information sheet.

13 - Zip-Chem product cross reference overview.

3-Technical terms : (click on term to see picture if available)

Arced Battered Bent Binding Bowed Brinelled Broken Bulged Burned Burrs Carboned

Chafed

Checked

Chipped

Circuit

Grounded

Circuit Open

Circuit Shorted

Collapsed

Corroded

Cracked

Crossed

Curled

Dented

Deposits

Disintegrated

Distorted

Eccentric

Eroded

Flattened out

Frayed

Fused

Galled

Glazed

Gouged

Grooved

Hotspot

Indications

Melted

Mis-matched

Mis-aligned

Nicked

Peeled

Pickup

Pitted

Plugged

Porous

Rolled-over

Rough

Rubbed

Ruptured

Rust

Scored

Scratched

Seized

Sheared

Spalled

Streched

Stripped

Torn

Worn

excessively

Arced:

Visible effects (burn spots, fused metal) of an undesired electrical discharge between two electrical connections.

Blind: Cego: Restricted movement such as tightened or sticking condition resulting from high or low temperature, foreign object jammed in mechanism, etc.

Burrs: Rebarbas: A rough edge or a sharp projection on the edge or surface of the parent material.

Chafed:

Frictional wear damage usually caused by two parts rubbing together with limited motion.

Checked:Verificado por: Surface cracks usually caused by heat.

Chipped:

A breaking away of the edge corner or surface of the parent material usually caused by heavy impact (not flaking).

Circuit - Grounded: Circuito - Aterrado: Undesired current path to ground (common).

Circuit - Open: Circuito - Aberto: Incomplete electrical circuit due to separation at or between electrical connection points.

Circuit - Shorted: Circuit - Curto-circuito: Undesired current path between leads or circuits that normally are at a different potential.

Corroded:

Gradual destruction of the parent material by chemical action. Often evidenced by oxide build-up on the surface of the parent material.

Crossed:

Material damage to parts (as in the case of crossed threads) or part rendered inoperative (as in the case of crossed wires) as a result of improper assembly.

Eccentric:

Part(s) wherein the intended common center is displaced significantly.

Eroded:

Carry away of material by flow of fluids or gases, accelerated by heat or grit.

Flattened out:

Permanent deformation beyond tolerance limits usually caused by compression.

Frayed:

Worn into shreds by rubbing action.

Fused:

Joining together of two materials usually caused by heat, friction, or current flow.

Glazed:

Undesirable development of a hard, glossy surface due to rubbing action, heat or varnish.

Indications:

Cracks, inclusions, fractures etc. not visible without fluorescent or magnetic penetrants.

Melted:

Deformation from the o-riginal configuration due to heat, friction or pres-sure as with melted bear-ings or insulation.

Mis-matched:

Improper association of two or more parts.

Mis-aligned:

Improper installation of a part resulting in damage to the installed part or to associated parts.

Plugged:

Pipe, hoses, tubing, channeling, internal passage etc. which are totally or partially blocked.

Rough:

Usually applies to operation as opposed to surface finish; i.e. a condition of bearings (which cannot be disassembled further) where during the spin test the rotation is rough.

Rubbed: (F errugem )To move with pressure or friction against another part such as compressor rub.

Sometimes written down when corrosion is found. Applies only to some specific persons. If "rust" is found, no aircraft will ever leave the hangar.

Parts bound together because of expansion or contraction due to high or low temperature, foreign object jammed in mechanism, etc.

of exposure to operating conditions.+

Stripped:

A condition usually associated with threads or insulation. Involves removal of material (threads) by force.

Worn excessively: (Gasta excessivamente) Material of part consumed as a result of exposure to operation or usage, beyond the limits given by the manufacturer.

8 - Cross reference table BMS/MIL/name: (UNCONTROLLED DATA !)

11-Oversize press fit type lube fittings.

When a lubrication fitting is blown out or lost, you can install a new one. But sometimes the lube hole is worn out. Then you can install an oversized lube fitting, but you need to rework the fitting to make it fit.

When there is no time to repair the fitting, you can lubricate the part with a special lube adapter p/n B411. Quando n?o há tempo para reparar a instala??o, você pode lubrificar a parte com um lubrificante especial p / adaptador n B411.