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Visual Acceptance Criteria

QP-20020 of 15 Revision: B

Revision History

Rev.

Page

Description of Revision

Date

A

B

All

13

Initial Release

Updated to discoloration

3/05/2015

01/03/2017




This document is subject to the controls and restrictions on the first page.



1.0 Purpose The purpose of this standard is to provide visual acceptance criteria for Curtiss Wright Sensors products. This procedure applies to all manufacturing and inspection activities on Curtiss Wright Sensor products.

3.0 Responsibility

3.1 Engineering and Quality Management is responsible for the application and administration of this procedure.

3.2 All employees are responsible for properly handling and documenting non-

conforming material in accordance with CW-Division discrepancy and MRB procedures.

4.0 Applicable Documents

4.1 Applicable documents are per procedures instituted by each Curtiss Wright manufacturing site. Documents include Control of Non-Conforming Product, Material Review Board and Records Retention.

5.0 Definitions / Acronyms

5.1 Blister: A localized lifting of coating, plating or paint from base material, appearing as a protuberance that may break when probed.

5.2 Burnish Mark: A local smoothing of a metal surface. Often to a high luster

resulting from rubbing. It may contain scratches of no apparent depth. Definition includes buffing and polishing marks.

5.3 Burr / Sharp Edge: A rough ridge or edge left at the intersection of two surfaces.

5.4 Burn: discoloration or streaks in plastic components due to improper mold / melt

temperatures.

5.5 Chatter Mark: A tool mark on material caused by vibration or jumping of a machine cutting tool.

5.6 Contamination: the presence of unwanted material or residue on or inside of a

part or product.

5.7 Corrosion: A deterioration of the metal resulting in change of color and leaving a rough surface that may show pits (small cavities).

5.8 Crack: A separation of material visible to the naked eye.







5.9 Crazing: A network of fine cracks. 5.10 Dent / Ding / Nick: A depression in a surface normally having rounded edges,

corners and bottom. Caused by an impact with an object.

5.11 Discoloration / Bleeding: A localized or generalized change of color of the part. Discoloration may be induced by Induction / Welding / Heat Treating processes. Definition includes etching.

5.12 Fetting: Removal of excess material or surface defects from casting flash /

forging seams and other similar parts.

5.13 Finger Print: Stains left by unprotected hands.

5.14 Flaking/Peeling: a section or area of a plated, anodized, painted, or other coating medium that lifts away from the intended surface. Loose scale like fragments on the surface.

5.15 Fleck Marks: A vertical cut mainly caused by debris in cutting fluids.

5.16 F.O.D (Foreign Object Debris): foreign material introduced into the machining,

assembly, inspection or packaging processes.

5.17 Scratch: the displacement and removal of material at the surface, most often resulting from contact with a hardened or sharp foreign object. Scratches can be superficial, have depth or appear on a sealed surface. Scratch categories include Cat 1 (Superficial), Cat 2 (Wide), Cat 3 (Depth) and Cat 4 (Sealing Surface). See Component Inspection Matrix.

5.18 Stain: Local visual induction resulting from liquid drying on parts such as

Alocrom. Includes any process material which is visible on the component.

5.19 Step: An abrupt change in a surface profile or a mismatch between two or more surfaces.

5.20 Surface Finish: The result of the machining process defined by the drawing

surface finish requirement.

5.21 Tool Marks: A mark in the direction of the machining lay left by the machining tool or across the lay caused by tool withdraw or metal chips. Marks can be straight, circular or spiral. Can also be caused by a dull or broken tool.

5.22 Undercut: A groove or recess cut into a surface near a shoulder or other

projection.







6.0 General Requirements

6.1 Some images/examples herein may not be of current CWC products but represent the levels of Acceptance and Rejection.

6.2 If there is any uncertainty, consult your supervisor who will consult with QA.

Remember IF IN DOUBT ASK.

6.3 If the CEO process is required in the traveler or routing, inspect the part against the appropriate CEO documentation and to the requirements of this procedure.

6.4 Visual features shall fall into the following categories

Acceptable without rework (in compliance with Table 1)

Acceptable with immediate rework activity (described in Table 1)

Rejectable – product with visual deviations deemed unacceptable shall be considered as non-conforming and dealt with in accordance with the relevant site procedures covering rework or scrap

Visual features typical of a finishing operation (such as machining) are acceptable if the drawing requirements are met

6.5 It is permissible to verify length and depth values by any practical means. 6.6 Visual inspection shall be performed with an unaided eye at arm’s length or

closer. If abnormalities are found, then a referee 4x optical magnification is permissible.

6.7 The probe used for inspection of scratch indications shall have an approximate

.025 inch (0.64 mm) spherical end radius and shall be made of a suitable material that will not damage the part.

6.8 All sealing surfaces shall be inspected at 4x magnification (minimum).

6.9 The inspector’s vision shall be corrected for 20/20 vison per procedures instituted

by each Curtiss Wright manufacturing facility. Part inspections shall take place under lighting conditions of 1100 lumens minimum and at the designated in-process and final inspection steps as noted in the assembly traveler / work instructions. Definitions as to inspection criteria and accept / reject callouts are indicated in the Component Inspection Matrix, found in Table 1 at the end of this procedure.







7.0 Non-Painted Surfaces: Unaided Visual Inspection (4x referee mag.).

7.1 Non-painted surfaces shall be free of nicks, dents, dings, scratches, burrs, sharp edges, tool marks and FOD.

7.2 Sealing surfaces (o-rings) shall be inspected at 4x magnification (minimum).

7.3 Shown are unacceptable conditions.







8.0 Paint / Sealant / Coated Surfaces: Unaided Visual Inspection (referee 4x mag.).

8.1 All sealed surfaces shall be free of dirt, grease, oil, nicks, scratches, voids/pin

holes, bubbles, peeling, and cracks. 8.2 The finish shall be smooth with complete uniform coverage without noted

blemishes, paint buildup or overspray.

8.3 Shown are unacceptable conditions:







9.0 Rust/Corrosion Surfaces: Unaided Visual Inspection (referee 4x mag.).

9.1 There shall be no rust or corrosion on painted and unpainted surfaces. 9.2 Shown are unacceptable conditions:







10.0 Connectors: Unaided Visual Inspection (referee 4x mag.).

10.1 There shall be no visible damage to the connector shell or internal contacts (pins).

10.2 The contacts shall not be bent, damaged, or deformed.

10.3 There shall be no flakes or metallic FOD in the connector or contacts

(sockets).

10.4 All seals on connector pins shall be intact without damage or voids.

10.5 On circular “MIL” standard connectors, there shall be no damage (tear) of the rubber seal surrounding the metal contacts.

10.6 All contacts shall be seated (no noted recessed contacts).








11.0 Exit Wires/Cable: Unaided Visual Inspection (referee 4x mag.).

11.1 All wiring and heat shrink insulation shall be inspected for damage including insulation tears and cuts. There shall be no exposed wiring except allowed per drawing.

11.2 Potting fill around wires shall have complete fill without voids or holes.








12.0 Stamping / Marking: Visual Inspection Criteria (no magnification).

12.1 Blurred, illegible or incomplete stamping of information. 12.2 Cage Code shall be correct per customer drawing / CW location.








13.0 Non-conformances

13.1 Non-conformances shall be processed per applicable procedures for the CW manufacturing site. Product shall be placed in quarantine until disposition by the appropriate MRB authority.

14.0 Component Inspection Matrix (Table 1).

FEATURES DEFINITIONS APPLICABLE PARTS ACCEPT/

REJECT

CONDITIO

N

ACTIONS TO

BE RECORDED

Blister A localized lifting of coating,

plating or paint from base

material, appearing as a

protuberance that may break

when probed.

All coated, plated or

painted parts and details.

REJECT Reject at source.

Follow Non-

Conforming

Procedure

Burnish Mark A local smoothing of a metal

surface. Often to a high lustre

resulting from rubbing. It may

contain scratches of no

apparent depth. Definition

includes buffing and polishing

marks.

All parts and details on

un-painted areas only

REJECT

ACCEPT

Not

acceptable

on Seal

Grooves

Provided

that the

material

thickness

meets

drawing

requirement.

Burr A rough ridge or edge left at

the intersection of two surfaces

All parts and details REJECT All burrs are to

be removed

immediately at

source.

Chatter Mark A tool mark on material caused

by vibration or jumping of a

machine cutting tool.

All parts and details REJECT

ACCEPT

Not

acceptable

on Seal

Grooves

Provided

part meets

drawing

surface

requirement

Assess to

drawing

requirements

Corrosion A deterioration of the metal

resulting in change of color and

leaving a rough surface that

may show pits (small cavities)

All parts and details REJECT Reject at source.

Follow Non-

Conforming

Procedure

Crack A separate of material visible to

the naked eye


Follow Non-

Conforming

Procedure

Crazing A network of fine cracks All parts and details REJECT Reject at source.

Follow Non-

Conforming

Procedure

Dent A depression in a surface,

normally having rounded

edges, corners and bottom.

Caused by an impact with an

object


Follow Non-

Conforming

Procedure







FEATURES DEFINITIONS APPLICABLE PARTS ACCEPT

/REJECT

CONDITIO

N

ACTIONS TO

BE RECORDED

Dis-coloration A localized or generalized

change of color of the part.

Definition includes etching

All heat treated parts and

details made of steel,

nickel alloys

ACCEPT Provided it is

an even light

straw or

light blue in

color and

free of

corrosion

All nitride parts and

details

ACCEPT Provided it is

light to dark

grey in color

All Anodized parts ACCEPT Provided it is

uniform light

grey

All Hard Anodized parts ACCEPT Provided it is

adherent,

uniform in

colour and

not powdery

Alocrom ACCEPT Provided it is

a uniform

gold/yellow

colour. Some

variation is

allowable in

touch up

areas.

Contact QA

Contact QA in

regards to touch

ups

Electroless nickel plated

steel parts which have

been subject to a thermal

deposit hardening

process (bake) in a non-

inert atmosphere e.g.

SAE AMS 2404, Class 2.

ACCEPT Any shade of

light yellow

to dark

peacock

blue/purple,

and any

variability

across the

part is

acceptable

Fettling Removal of excess material or

surface defects from casting

flash/forging seams and other

similar parts

All parts and details ACCEPT Provided

parts are

blended and

uniformed.

Drawing

limits must

be

maintained.

Finger Print Stains left by unprotected

hands

All parts and details ACCEPT Provided

action is

taken to

clean the

component

Remove

immediately at

source

Fleck Marks A vertical cut mainly caused by

debris in cutting fluids

All ground diameters Unacceptable

if there is more

than one

indication on

the same axis

Reject at source.

Follow Non-

Conforming

Procedure

Flaking/Scale Loose, scale like fragments on a

surface


Follow Non-

Conforming

Procedure








/REJECT

CONDITIO

N

ACTIONS TO

BE RECORDED

Superficial

Scratch

CAT 1

A scratch that has no apparent

depth (cannot be felt by probe)

Less than 10mm

All parts and details ACCEPT Rework

options will

apply if

deemed

applicable

Mend, blend. Re-

anodize (if req’d)

superficial

scratches.

Wider Scratch

Marks

CAT 2

A scratch which has occurred

in a treated/coated material and

is CLEARLY visible in normal

lighting conditions (i.e. not

superficial as above)

All parts and details REJECT Due to the

width of the

scratch the

appearance

of the

surface is

extremely

poor and is

IMMEDIAT

ELY evident

to the

inspector

Reject at source.

Follow non-

conformance

procedure.

Scratch with

apparent depth

CAT 3

Significant damage of surface

area in length and depth and

can be felt be a probe

All parts and details REJECT Major

damage with

significant

depth

Reject at source.

Follow non-

conformance

procedure.

Scratch on

sealing surface,

critical bore

with apparent

depth.

CAT 4

The scratch is NOT purely

superficial (as above) AND the

scratch is likely to cause a loss

of functionality or performance

due to its location

All parts and details REJECT Scratch is on

a critical

area or

surface/bore,

Further

consultation

is required if

unsure

whether area

is critical

Reject at source.

Follow non-

conformance

procedure.

Stain or excess

process

material

Local visual indication resulting

from liquid drying on parts e.g

Alocrom. Includes ANY process

material which is visible on the

component.

All parts and details ACCEPT

REJECT

Provided

there is no

visible

change in

height and

excess has

been cleaned.

Must meet

drawing

requirement

If excess

material

remains

after

cleaning

Remove excess

immediately at

source.








/REJECT

CONDITIO

N

ACTIONS TO

BE RECORDED

Step An abrupt change in a surface

profile or a mismatch between

two or more surfaces

All machines parts and

details

ACCEPT Provided it

complies

with drawing

requirement

Examine against

drawing

requirements.

Follow non-

conformance

procedure if

required.

Surface Finish The result of the machining

process defines by the drawing

surface finish requirement

All machined parts and

details

ACCEPT MUST meet

drawing

requirement

Tool Mark A mark in the direction of the

machining lay left by the

machining tool or across the lay

caused by tool withdraw or

metal chips. Marks can be

straight, circular or spiral. Can

also be caused by a dull or

broken tool.


details

ACCEPT Provided

part meets

drawing

surface

requirement

and does not

fail CAT 1

Examine against

drawing

requirements.

Follow non-

conformance

procedure if

required.

Undercut A groove or recess cut into a

surface near a shoulder or

other projection


details

ACCEPT Provided it

blends

smoothly

with

adjacent

surfaces and

that it is

within

drawing

tolerances.

Examine against

drawing

requirements.

Follow non-

conformance

procedure if

required

15.0 Records.

The preservation, storage and period of records must be in accordance to applicable Records Control procedures per CW manufacturing site.

Appendix A – Additional Change Details Issue B - Update to section 14 “Discoloration” with respect to Electroless nickel plated steel parts which have been subject to a thermal deposit hardening process (bake) in a non-inert atmosphere e.g. SAE AMS 2404, Class 2. Rationale as follows: Discoloration occurs due to the formation of nickel sulfate when the parts undergo thermal deposit hardening in the presence of moisture from the atmosphere. There are at least 7 nickel sulfate salts which differ in their hydration or crystal habit, resulting in the range of colors from light yellow to dark peacock blue/purple. Small variances in moisture or humidity will cause a range of these colors to be evident within a single part or batch of parts, and this is completely normal. SAE AMS 2404, Class 2 specifically states that discoloration may occur and is acceptable. As additional proof, sample parts demonstrating the greatest variation have been subject to copper sulfate tests to prove that iron is not present.





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