CAUTION: DO NOT USE ANY ABRASIVE MATERIALS FOR DEBURRING OR BLENDING.
(i)
Deburr as required and blend excess metal spray.
E. Method No. 403E: Dry-film Lubricant Repair Dry-film lubricant repairs should be performed as follows: CAUTION: DO NOT REMOVE HARD ANODIZE COATING OF PART.
(1)
Remove original dry-film lubricant by abrading with abrasive cloth (Federal Specification A-A-1048) (SECTION VII) down to anodized or plated finish of part.
(2)
Clean abraded surface in accordance with SECTION II. Allow surface to dry thoroughly before proceeding to Step (2).
(3)
Apply required thickness of dry-film lubricant as specified in applicable manual, in accordance with manufacturer’s recommendations.
(4)
Cure dry-film lubricant in oven in accordance with manufacturer’s recommendations.
F. Method No. 403F: Plasma Spray Repair Plasma spray coated surface repairs should be performed as follows: WARNING: USE CORRECT PERSONAL PROTECTION. PROCEDURES THAT NEED GRIND/MACHINE WORK WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES.
(1)
Machine surfaces to remove old plasma spray. Machine surface undersize where necessary to allow for specified finish thickness of plasma spray deposition coating after final machining.
(2)
Perform magnetic particle or fluorescent penetrant inspection, as applicable. Refer to SECTION III.
(3)
Degrease part in accordance with SECTION II.
Repair Page 413 Apr 1/05
20-00-02/70-00-01
CAUTION: EXERCISE CARE IN MASKING AND SEALING OF PARTS TO ENSURE ALL AIR/OIL PORTS, STRUCTURAL OPENINGS, AND RELATED SURFACES OF PARTS ARE PROTECTED FROM OVERSPRAY.
(4)
Mask all areas not to be grit blasted.
NOTE: Do not use metal abrasive alloys in surface conditioning for plasma spray deposition.
(5)
Grit blast area to be coated with plasma spray using aluminum oxide grit (120 Mesh) (SECTION VII) to obtain a minimum surface roughness of 63 microinches (1,6002 Micrometers).
(6)
Deposit plasma spray in accordance with manufacturer's specification onto the designated surfaces to the thickness specified or to sufficient thickness to permit finishing by machining and/or lapping to dimensions specified.
WARNING: USE CORRECT PERSONAL PROTECTION. PROCEDURES THAT NEED GRIND/MACHINE WORK WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES.
(7)
Machine coated surfaces to dimensions specified in applicable manual.
(8)
Deburr as required and blend any excess plasma spray on adjacent surfaces.
G. Method No. 403G: Abradable Coating Surface Wear Repair
NOTE: Keep adhesive (EA-929) (SECTION VII) and abradable coating compound (ADX-352) (SECTION VII) refrigerated at 42 to 52F (6 to 11C) to extend shelf life. Discard adhesive and compound that exceeds shelf life or becomes to thick to spread or handle without crumbling.
Allow adhesive or compound to warm to room temperature or heat to a maximum of 110F (43C) prior to application. Discard excess material, which has been heated for purpose of thinning.
Abradable coating surface wear repairs should be performed as follows:
WARNING: SOLVENT VAPORS ARE TOXIC AND FLAMMABLE. DO NOT INHALE. OBSERVE FIRE PRECAUTIONS.
(1)
Clean uncured adhesive and compound from application equipment, using toulene (Federal Specification-TT-T-548) (SECTION VII).
WARNING: USE CORRECT PERSONAL PROTECTION. PROCEDURES THAT NEED GRIND/MACHINE WORK WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES.
(2)
Machine surfaces just enough to remove existing abradable coating.
(3)
Perform magnetic particle or fluorescent penetrant inspection, as applicable. Refer to SECTION III.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：标准施工手册 STANDARD PRACTICES MANUAL 20-00-02/70-00-01(70)
