mil

LOCKHEED MARTIN FPS-3008FTactical Aircraft Systems Date: 20 January 1999FSCM 81755 Superseding: FPS-3008E

MARKING OF AIRCRAFT AND AEROSPACE

GROUND EQUIPMENT PARTS

Releasability of this material under the Freedom of Information Act is subject to the restrictions onrelease in DoD Regulation 5400.7-R and DoD Directive 5230.25.


MARKING OF AIRCRAFT AND AEROSPACE

GROUND EQUIPMENT PARTS

Prepared By: Approved By:

Ginna Walters_____________________ R. V. Wolff for______Ginna Walters C. H. Mooney, ManagerF-16 Systems Engineering, F-16 Systems Engineering,Materials, and Parts Materials, and Parts


MARKING OF AIRCRAFT AND AEROSPACE GROUND EQUIPMENT PARTS

1 SCOPE 1

2 APPLICABLE DOCUMENTS 1

2.1 FEDERAL DOCUMENTS 1

2.2 MILITARY DOCUMENTS 1

2.3 LMTAS DOCUMENTS 2

3 REQUIREMENTS 2

3.1 MARKING REQUIREMENTS 23.1.1 PART IDENTIFICATION MARKING 23.1.2 METHODS OF APPLYING 33.1.3 INSUFFICIENT SURFACE 33.1.4 PERMANENCY AND LEGIBILITY 33.1.5 MARKINGS EXPOSED TO FUEL 3

3.2 PART OR DASH NUMBER CHANGES 3

3.3 MARKING METHODS 33.3.1 CLASS 1 MARKINGS 33.3.2 CLASS 2 MARKINGS 4

3.4 APPLICATION OF MARKING 53.4.1 IN-PROCESS IDENTIFICATION, INSPECTION, AND NON-DRAWING-REQUIRED

MARKINGS 53.4.2 LETTERING 53.4.3 SEQUENCE (STAGE) OF MARKING 5

4 QUALITY ASSURANCE PROVISIONS 6

4.1 EVALUATION 6

4.2 QUALIFICATION 64.2.1 QUALIFIED PRODUCTS 64.2.2 QUALIFICATION TESTING 6

4.3 TEST METHODS 64.3.1 CORROSION TEST METHOD 64.3.2 FLUID RESISTANCE TEST METHOD 64.3.3 PAINT ADHESION 74.3.4 PHOTOMICROGRAPHIC EXAMINATION 7

5 NOT APPLICABLE 7

6 NOTES 7

6.1 MARGINAL INDICIA 7

6.2 SPECIFICATION DISTRIBUTION 7

7 ACKNOWLEDGEMENT 7


8 NON-CONFORMANCES 7

9 ENVIRONMENTAL HEALTH AND SAFETY 7


CHANGE INDEX REVISION F

This revision incorporates Amendments 1-5 to Revision E of this document. A variety ofeditorial changes were made throughout the document. The following is a list of technicalchanges made in this revision.

Paragraph No. Change Reason2 Add addresses of the document

sources, correct titles ofdocuments, etc.

Update Applicable Documents list

2.1, 3.3.2.2 (b) Delete reference to TT-I-1795 TT-I-1795 has been canceled. A-A-208 is the replacement.

3.3.2.6 Add a statement to clarify whichinks require P5395 for protectionfrom solvents

REA MH96442

3.3.2.6, 3.3.2.7,3.3.2.9

Delete lists of qualified sourceswithin the specification.

Source information changesfrequently.

4 Establish requirements forqualification of new markingmaterials and marking systems

REA MI27417


1

MARKING OF AIRCRAFT AND AEROSPACE GROUNDEQUIPMENT PARTS

1 SCOPEThis specification covers the requirements for marking of aircraft parts and aerospace groundequipment parts.

2 APPLICABLE DOCUMENTSThe following publications shall be applicable to the extent specified herein, or as defined on thecontract or purchase order. These publications shall be in effect as of the issues listed, exceptLockheed Martin Tactical Aircraft Systems (LMTAS) specifications shall be the issue effective onthe date of the contract or purchase order. Compliance with any other issues of thesepublications requires prior written approval from LMTAS. Insofar as any of the publicationsreferred to herein conflict with the requirements of this specification, this specification shallgovern.

2.1 FEDERAL DOCUMENTS

Available from DODSSP Subscriptions Services Desk, Building 4D, 700 Robbins Avenue,Philadelphia, PA 19111-5094

A-A-208 Ink, Marking, Stencil, Opaque

QQ-A-250/4 Aluminum Alloy 2024, Plate and Sheet

TT-I-735 Isopropyl Alcohol

Fed-Std-595 Colors used in Government Procurement

2.2 MILITARY DOCUMENTS

Available from DODSSP Subscriptions Services Desk, Building 4D, 700 Robbins Avenue,Philadelphia, PA 19111-5094

MIL-C-22750 Coating, Epoxy Polyamide

MIL-C-27725 Coating, Corrosion Preventive for Aircraft Integral Fuel Tanks

MIL-M-43719 Marking Materials and Markers, Adhesive, Elastomeric,Pigmented; General Specification for

MIL-C-83286 Coating Urethane, For Aerospace Application

MIL-C-85285 Coating Polyurethane, High Solids

MIL-P-23377 Primer Coating, Epoxy Polyimide, Chemical and SolventResistant

MIL-P-85582 Primer Coating: Epoxy, VOC Compliant, Chemical and SolventResistant

MIL-PRF-83282 Hydraulic Fluid, Fire Resistant Synthetic Hydrocarbon Base,Metric, NATO Code Number H-537

MIL-STD-130 Identification Marking of U.S. Military Property


2

2.3 LMTAS DOCUMENTS

Available from LMTAS Service Library, P. O. Box 748, MZ 1519, Fort Worth, TX 76101

FMS-1058 Primers for Sealants

FMS-2004 Cleaning Solvent, General Purpose

FMS-3014 Nitrile Phenolic Adhesive, Application In Aircraft Integral FuelTanks

FPS-3035 Process and Quality Control of Adhesively Bonded Integral FuelTank

P5396 Cloth, Cleaning, Woven

3 REQUIREMENTS

3.1 MARKING REQUIREMENTS

Parts shall be individually marked with the applicable design activity code identification, a slashor “Assy” as applicable, and identifying number. Parts in assemblies that are not normallysubject to disassembly or repair, that is welded, riveted, brazed, cemented, or bonded, do notrequire individual marking. In addition, the calendar date of manufacture shall be applied ifrequired by Engineering specifications (FPS-3035, etc.). The application of manufacturing dateor other pertinent manufacturing information is optional. The marking may be one or more lines

3.1.1 PART IDENTIFICATION MARKINGIn the case of separable assemblies, the slash shall be replaced by the abbreviation “ASSY.”Part number markings shall be of the class specified, placed at the location indicated andconstructed in accordance with the detail callout of the engineering drawing. When the locationis not identified on the drawing the marking location is optional and must comply with therequirements of this specification

For example:

(a) The drawing callout, “PLACE PART NO. HERE,” indicates a requirement toconstruct the part identification number as shown below:

Design Activity Code Identification Number (LMTAS shown)

A Separation Symbol

Part Identification Number

81755 / 16P197-7

For example:

(b) The drawing callout, “PLACE ASSY NO. HERE” indicates a requirement toconstruct the part number as shown below:

Design Activity Code Identification Number (LMTAS shown)

Separable Assembly

Part Identification Number

81755 ASSY 16P203-801


3

3.1.2 METHODS OF APPLYINGMarking shall be per the Class, and letter designation (if any), noted on the engineering drawing.Approved alternates are listed in this specification. When a letter designation is not shown, anymethod within that Class may be used as long as the marking complies with the requirements ofthis specification. Approved alternates are listed in this specification.

3.1.3 INSUFFICIENT SURFACEWhen parts do not have a suitable surface or area on which the number can be placed, the partsare to be tagged per Class 2D or placed in marked containers per Class 2E.

3.1.4 PERMANENCY AND LEGIBILITYThe markings classified in this specification shall remain legible and be as permanent as thenormal life expectancy of the item on, or to which, it is applied. The markings shall be capableof withstanding the environment specified for the item. The color of the marking shall contrastwith the surface color of the item.

3.1.5 MARKINGS EXPOSED TO FUELMarkings that will be exposed to fuel shall be marked per one of the following methods.

3.1.5.1 Parts coated with MIL-C-27725, FMS-3014, or FMS-1058Use Class 2A, 2B, 2F, or 2G markings. These markings may be applied before the coating onlyif the marking is clearly legible after coating application, or the marking may be applied after thefinal coating. Protective coating over the marking is optional.

3.1.5.2 Parts with anodized finishUse Class 2A, 2B, 2F, or 2G markings. These markings shall be applied after anodize.Protective coating over the marking is optional.

3.1.5.3 All other partsUse Class 2A, 2B, 2F, or 2G markings. These markings shall be protected by coating with MIL-C-27725. FMS-3014 may be used as an alternate, provided the primer will be cured in asubsequent operation. Markings must be clearly visible after application of the protectivecoating.

3.2 PART OR DASH NUMBER CHANGES

In all instances when an item is altered in conjunction with an engineering change and a new partor dash number is required, the old part or dash number and manufacture date shall beobliterated without damage to the part and the new part or dash number and manufacturing dateapplied. Both obliteration and re-identification shall be accomplished in the same manner asspecified on the drawing unless otherwise specified by the engineering documentation initiatingthe change

3.3 MARKING METHODS

3.3.1 CLASS 1 MARKINGS

3.3.1.1 Class 1A—VibroengravingFor Class 1A marking, an electric or air vibrating tool equipped with a special hardened steel orsynthetic engraving needle shall be used to produce an indented marking. The minimum


4

spherical radius of the engraving tool point shall be 0.007 inch. The impression depth of themarkings shall not exceed 0.003 inch on material thicknesses of 0.040 inch or less, nor 0.005inch on material greater than 0.040 inch. Vibroengraving shall be applied prior to the applicationof protective finishes such as chemical film, anodize, primer or paint.

3.3.1.2 Class 1B—Electro-EtchFor Class 1B markings, an electrolytic stamping unit equipped with a transfer stencil and an AC-DC transformer shall be used to produce an etched marking. Electro-etch markings shall not beapplied to steel parts with a tensile strength above 180,000 psi. The electrolytic stamping unitand electrolyte shall be from a qualified source listed on FQPL-3008.

3.3.1.3 Class 1C—Acid Etching InkFor Class 1C markings, an acid-type etching ink shall be used to produce an etched marking.The process must include neutralization of acid with a mild solution of ammonium hydroxide orsodium bicarbonate, followed by rinsing the area with water to remove the acid. The etching inkshall be from a qualified source listed on FQPL-3008.

3.3.2 CLASS 2 MARKINGSClass 2A rubber stamp, Class 2B stencil, Class 2F hand lettering, or Class 2G Automatedmarking may be used as alternates. Class 2C, decal, may also be used for markingmanufacturing serial numbers on printed circuit assemblies.

3.3.2.1 Class 2A—Rubber StampFor Class 2A markings, a rubber stamp shall be pressed onto an ink pad and the ink transferredto the part surface.

3.3.2.2 Class 2B—StencilFor Class 2B markings, a paper, plastic, or metal stencil and MIL-C-22750 paint or A-A-208stencil ink shall be applied by brush or spray gun.

(a) Unless otherwise specified on the drawing, when MIL-C-22750 paint is used, itshall be black epoxy paint, Color 37038, per Fed-Std-595 unless the backgroundis black. In such instances it shall be white, color 17875 or 17925.

(b) When A-A-208 stencil ink is used, it may be applied by stencil techniques or byrubber stamping from an ink pad containing the A-A-208 ink.

NOTE: Class 2G Automated Marking may be substituted for Class 2B markings ontubing and tubing assemblies. Where the engineering drawing calls out Class2B markings for Reference Designators, it is permissible to use FPS-1002 TypeIIK plates as alternates.

3.3.2.3 Class 2C—Decalcomanias (Decals)For Class 2C markings, a plastic film or other transfer medium shall be printed and applied to thepart surface in accordance with MIL-M-43719. Decals shall not be applied in plenum chambersor air flow passages.

3.3.2.4 Class 2D—TaggingFor Class 2D markings, a metal, paper, or plastic tag shall be attached to the part usingnondestructive methods. Tag markings shall not be applied in plenum chambers or air flowpassages.


5

3.3.2.5 Class 2E—Marked ContainersFor Class 2E markings, parts shall be placed into a paper bag, plastic bag, or other suitablecontainer. The marking information shall be applied to the exterior surface of the container or toa tag attached securely to the container.

3.3.2.6 Class 2F—Hand LetteringFor Class 2F markings, parts shall be legibly marked free hand using ink per A-A-208 or any ofthe product approved for use at the using facility. Reference paragraph 4.2.1. Inks listed asqualified for Class 2FW may be used for white markings only. Class 2FW inks shall beprotected from solvents with P5393 tape.

3.3.2.7 Class 2G—Automated MarkingFor Class 2G markings, use an automated system approved for use at the using facility.Reference paragraph 4.2.1.

3.3.2.8 Class 2H—Marking Plates, Self-AdhesiveFor Class 2H markings, P082 marking plates shall be used. In house marking may beaccomplished utilizing metal stamping methods including typewriter, as appropriate forapplication. Self Adhesive Marking Plates markings shall not be applied in plenum chambers orair flow passages.

3.3.2.9 Class 2J—Hot Stamp FoilFor Class 2J markings a hot stamp foil marking machine shall be used. The machine and thefoil shall be from a source approved for use at the using facility. Reference paragraph 4.2.1.Hot stamp foil markings are for heat shrink tubing only.

3.4 APPLICATION OF MARKING

3.4.1 IN-PROCESS IDENTIFICATION, INSPECTION, AND NON-DRAWING-REQUIREDMARKINGS

In process identification, inspection markings and non-drawing-required markings shall beapplied per Class 2. Class 1 markings may be used only when specifically authorized by a Class1 marking callout on the drawing. The location of these markings is optional unless otherwisenoted on the drawing. The markings shall not be applied on surfaces that form the exterior of theairplane when in flight with landing gear up. Exterior primed surfaces may be marked with atemporary method of marking which can be removed during the preparation for final finishing, oris covered by final finish. Components installed in the crew compartment shall be marked in sucha manner that the marking is not visible to the crew members.

3.4.2 LETTERINGLettering of markings shall approximate Futura Medium Capital or Sans-Serif Gothic Capitals.Only Arabic numerals shall be used.

3.4.3 SEQUENCE (STAGE) OF MARKINGClass 2A, Class 2B, Class 2F or Class 2G markings required per 3.1.1 and serial numbers shallbe applied as shown below. The final finish determines the finish and marking sequence.

(1) MIL-C-27725 Fuel Tank Corrosion Resistant Coating or FMS-3014 Form 2Adhesive Primer - mark per paragraph 3.1.5.


6

(2) Primed parts - marking may be accomplished before or after priming as long asmarkings are clearly legible after the final prime coat.

(3) MIL-C-83286 or MIL-C-85285 Urethane topcoat - mark after application of thetopcoat.

(4) MIL-C-22750 or MIL-C-85582 Epoxy topcoat - mark after application of thetopcoat.

Other classes of markings shall be applied to the part at an appropriate stage of manufacture.

4 QUALITY ASSURANCE PROVISIONS

4.1 EVALUATION

Parts shall be visually examined for evidence of marking. The marking shall be uniform andlegible. The marking shall meet the requirements outlined in this specification.

4.2 QUALIFICATION

4.2.1 QUALIFIED PRODUCTSThe responsible group at the using facility shall maintain a list of marking products qualified foruse at the facility. Facilities other than LMTAS may use any of the marking products or systemsqualified for use at LMTAS.

4.2.2 QUALIFICATION TESTINGQualification testing shall be conducted for each marking material or marking system prior to useon production parts. Each Class I marking system shall be evaluated for effectiveness andsafety to the part being marked by the cognizant LMTAS groups. Approved sources of Class IBand Class IC markings are listed on FQPL-3008. Qualification testing shall be conducted forClass II marking materials and systems in accordance with Table 1. The tests shall beperformed by the using facility using their own laboratory or any other laboratory acceptable toLMTAS. LMTAS shall have the right to witness any qualification testing conducted by the usingfacility or their selected test agency. The qualification test data will be forwarded to LMTAS forevaluation and approval. Approved sources will be listed on FQPL-3008. Specific tests may bewaived for a given marking material with the approval of LMTAS.

4.3 TEST METHODS

4.3.1 CORROSION TEST METHODApply the marking to each of the following materials: commercially pure copper, bare (notanodized) aluminum per QQ-A-250/4-T3, and AMS 5561 (or other 21-6-9 300 series steel alloy).Expose each test panel to laboratory air for 336 hours. Examine the area around the markingunder 10x or greater magnification. There shall be no evidence of corrosion.

4.3.2 FLUID RESISTANCE TEST METHODApply the marking to a sheet of anodized aluminum per QQ-A-250/4-T3 and to bare AMS 5561(or other 21-6-9 300 series steel alloy). Expose one test piece of each material to each of thefollowing test fluids for the indicated time:

a. JP-8 Fuel per MIL-T-83133 at room temperature for 72 hours

b. Hydraulic Oil per MIL-PRF-83282 at room temperature for 72 hours


7

c. FMS-2004 wipe

Remove the panel and wipe the wet ink surface with P5396 cloth a minimum of 10 doublestrokes. Some fading of the ink is permissible, but the ink shall be legible.

4.3.3 PAINT ADHESIONApply the marking to a sheet of anodized 2024-T81 aluminum per QQ-A-250/4-T81. Prime overthe dried ink with MIL-P-23377 or MIL-P-85582 primer. Perform a non-scribed wet tape test perMIL-F-18264. There shall be no loss of primer adhesion associated with the ink when the 3M250 tape test is performed.

4.3.4 PHOTOMICROGRAPHIC EXAMINATIONApply the marking to a sheet of anodized 2024-T81 or QQ-A-250/4-T3, and AMS 5561 (or other21-6-9 300 series steel alloy. Submit the coupons to LMTAS for photomicrographic examination.The coupon shall not exhibit evidence of metal removal or other damage caused by the markingprocess.

5 NOT APPLICABLE

6 NOTES

6.1 MARGINAL INDICIA

A vertical line in the left margin is used to show technical changes from the prior issue of thisspecification

6.2 SPECIFICATION DISTRIBUTION

Specifications are released internally at LMTAS using the EDMS system. For externaldistribution, contact LMTAS for additions, deletions, and corrections to distribution lists

7 ACKNOWLEDGEMENTA supplier shall reference this specification number, its revision letter, amendment in allquotations and when acknowledging purchase orders.

8 NON-CONFORMANCESProduct not conforming to this specification and the purchase order is not acceptable.

9 ENVIRONMENTAL HEALTH AND SAFETYDetails for handling chemicals or material may be found in Material Safety Data Sheet’s (MSDS)and Safe Practice Instructions (SPI). Contact Occupational Health and Safety, Department 003-3 for MSDSs and SPIs. Subcontractors or vendors are responsible for compliance with allapplicable regulations for their facilities. Contact Occupational Health and Safety for questionsabout handling information and protective gear needs.


8

Marking Type 2A 2B 2C 2D 2E 2F 2G 2H 2J

Testing RequiredNote 1

Corrosion(ref. para. 4.3.1)

√ √ √ √

Fluid Resistance(ref. para. 4.3.2)

√ √ √ √ √ √ √

Paint Adhesion(ref. para. 4.3.3)

√ √ √ √

PhotomicrographicExamination(ref. para. 4.3.4)

√

Note 1: Required tests are denoted with a “√.”

Note 2: Items used for Class 2D and Class 2E markings do not require qualification testing. Anysuitable, locally available product may be used.

Table 1 - Qualification Tests Required

mil

Documents

air flow passages

contact occupational health

lockheed martin fps

class 2b markings

class 2e markings

qualified source listed

class 2a

class 2d