MIL-STD-869D
5.2.2.3 Metallographic Examination. Representative test panels approximately
3 x 2 x 0.050 inches shall be coated on one side to the same thickness as the production item. Metallographic examination of the coating shall show the constituents to be uniformly distributed and free from cracks, massive porosity, included material and excess oxides. The coating - substrate interface shall also be free from contamination. Frequency of this test shall be determined by the applicable engineering department. Porosity and oxide limits shall also be specified by the applicable engineering department.
5.2.3 Certification of Operators. Each operator must be trained and certified. A hardness test along with a bond strength test is required in accordance with local directives prior to being permitted to spray production parts.
5.2.4 Qualification of Operators. Operators performing work under this standard shall be certified as qualified operators by the Quality Control department. Certification shall be conferred on trained operators, who successfully demonstrate knowledge of the process and their ability to produce satisfactory coatings per this standard.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. This standard provides guidance on the processes and procedures for flame spraying for the verification of the Air Force repair process on the landing gear of all aircraft. It is an Air Force unique manufacturing, repair and re- procurement standard that will be used primarily by the Air Force at Hill AFB.
6.2 Subject term (key word) listing.
Flame Spray Gases Procedures Spray System Testing
Types
6.3 Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes.
CONCLUDING MATERIAL
Custodian: Preparing Activity: Air Force - 70 Air Force - 70
(Project: MFFP-0726-000)
NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, verification of the currency of the information above using the ASSIST Online database at: https://assist.daps.dla.mil.
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