OPERATIONAL INFORMATION REQUIREMENTS

Transcription

1 OPERATONAL NFORMATON REQUREMENTS These description apply to aircraft which are brought in for paint stripping or sanding followed by repainting of the exterior surface. No exterior maintenance is carried out on the aircraft. For each process carry out by Eirtech Aviation Ltd. were created procedure to provide the best service. Pre-Stripping Sanding (A) Once the aircraft arrives the hangars door are opened and the aircraft is brought inside. The doors are closed and docking is positioned around the aircraft to permit access to all area during the operations. *. The aircraft is electrically earthed by connecting the earthing point on the fuselage to earthing points in the hangar. This is referred to as bonding the aircraft. The purpose of this is to prevent static charges building up on the aircraft and thereby eliminate fire risk associated with sparking. Bonding the aircraft is also crucial to the efficient application of paints. Heating is switched on once the door are closed. Paint materials and chemical strippers are provide in 200t drums, others paints materials are supplied in 5t to 25t tins. n order to minimise risk of spillage, larger quantities of materials are stored in the bunded area and brought to the in quantities necessary for each aircraft only. Chemical Stripping (Bl) Prior to applying chemical stripper to the aircraft, composite areas are masked using a combination of craft paper, masking tape, aluminium foil and polythene sheeting. Ventilation is switch on. Stripper is applied to the surface where stripper is required. The stripper is allowed to soak into the paint for some time. Depending on the number of coats previously applied and number of other factors affecting the adhesion of the paint to the metal, the duration of the time required for the stripper to be effective can vary significantly. Repeated applications may be necessary to some or all of the area. During soak time some of the areas such wings or composite are taking to sand. Sanding is performed by means of hand held portable sanders with in line vacuum. Particulates generated in this way and filtered and collected down the line. Abrasive discs are attached to the portable sanders. Once the stripper has acted, the remaining stripper and paint flakes are removed using rubber squeegees. The

2 residue is collected in the polythene sheets which are than gathered. The liquid component of the waste is placed in 200t open top drums. Detergent is wiped onto the stripped surface and the plastic is set aside to be clean up during clean up of the hangar. A wet wash is than required. Hand held pneumatic rotary tools with water attachments are used. Scotch bright pads are attached and water trickles through the devices. Ventilation is switched off. Post - Stripping Treatment (B2) Old sealer damaged by the stripper is removed from the aircraft joints by hand using a Teflon scraper. The waste sealer is disposed of along with the waste stripper. The joints are then wiped with cleaning solvent to prepare them for new sealer application. Masking tape is applied along the side of the joints and the joints are resealed with the appropriate sealer by means of a special pneumatic application gun. Sealer is supplied in tubes in which the components are mixed immediately prior to use. n preparation for painting, the aircraft is re- masked. Windows and certain areas not be painted with a particular colour are covered. f necessary, rust inhibitors may be applied to localised areas of the aircraft surface. Ventilation is switched on prior to commencing this operation. The rust inhibitors is applied by hand using brushes and reacts with the surface of the metal to prevent corrosion. Ventilation is switched on. The entire surface area of the aircraft to be painted is cleaned with panel wipe solvent. This is applied with rags soaked in the solvent. Aircraft which have been chemically stripped required a coat of primer containing corrosion inhibitors. This primer is mixed with hardener and thinner.. The primer is applied to the aircraft using paint spray guns, This begins at the tails, proceeds the fuselage and then the wings. The primer coat is then left for a period to dry. Sanding (C) n the case of aircraft which are to be sanded the aircraft is masked as above. Ventilation is switched on. All the request area of the aircraft is sanded. The aircraft is power washed whit high pressure water nozzles no detergents are used during the wash. Unnecessary masking is removed. The entire aircraft is degreased. 2

3 Painting (D) All aircraft whether stripped chemically or sanded required a coat of chromate free primer. This is mixed whit thinner and hardener. The primer is applied using paint spray guns. The primer coat is then allowed to dry. Paint guns are cleaned. Paint is mixed with hardener and thinner. As for the primers each coat is applied using paints spray guns. Depending on the colour scheme required by the customer not all area may be painted a particular colour. Generally the fuselage is first to be painted as it is the largest area. Smaller area of a particular colour is painted later. The coat of paint is left for approximately one hour to dry. The final coat of each colour is allowed 8 to 0 hours dry before the next colour begins. Then aircraft is re-masked in preparation to the next colour. A number of colours may be painted at the same time if their areas are sufficiently far apart not to interfere with each other. Logos may be painted on or applied to the aircraft as labels. Clear Coat (E) n some cases a clear coat is required as per customer specification. Application of a clear coat is a very rare occurrence. Paint spray guns are cleaned. The clear coat varnish is mixed with hardener and thinner similar to that for paint. Just one coat of clear coat is sprayed onto the entire aircraft. Masking is only required for area such as windows. This is then allowed to dry over a period of 8 to 0 hours. All masking is removed from the aircraft. Solvent may be used to dissolve gum from the masking tape and aluminium foil. Technical markings such as registration number are then painted on by hand using stencils. Paint spray guns are given a final cleaning for duration of 2 to 3 hours. Heating and ventilation is switched off. Edge Sealing (F) f a clear coat is not required the paint edges of logos and around windows are sealed. The aircraft is fully de-masked before this. Technical markings such as registration number are painted on hand using stencils. Paint spray guns are given a final cleaning for duration of 2 to 3 hours. Special edge sealing paints is applied by hand to the edges of logos, around windows and anywhere the paint meets the bare surface. Heating and ventilation is switched off. 3

4 Hangar clean- up (G) Docking is removed from around the aircraft and the earthing connection to the aircraft is disconnected. The hangars doors are opened. The aircraft is removed from the hangar. Hangar doors are closed. All remaining waste in the hangar is cleaned away. The hangar floor is swept. The plastic sheeting from chemical stripping is put into 200t barrels and is compacted. All drums of waste paint sludge, waste stripper removed to the bunded waste area. The water collected in the sump is pumped into BC s and stored in the bunded waste area. Water is also collected by tanker truck and sent directly to licence waste contractors for treatment. 4

5 A - PRE STRPNGBANDNG PROCESS FLOW N HANGAR DOORS OPENED ARCRAFT NTO HANGAR ARCRAFT DOCKED & BONED (ERTHED) NTERORS REMOVED FROM ARCRAFT TO WORKSHOP HEATNG SWTCHED ON.PANTNG/STRPPNG KTS BROUGHT NTO HANGAR NTERORS NOT REMOVED 5

6 B- CHEMCAL STRPNG PROCESS FLOW N HANGAR L ARCRAFT MASKNG POLYTHENE SHEETS PLACED UNDER ARCRAFT STRPPER APPLED TO TAL, FUSELAGE & WNGS SOAK TME 4 b 4 REPEAT AS NECESSARY REMANNG PANT & STRPPER SOME SANDNG OF COMPOSTES WHLE WATNG REMOVED USNG SEQUEEGEES PLASTC STORED FOR BARRELLNG LQUD WASTE MMEDATELY COLLECTED N DRUMS + PUMPS, LANCES & HOSES CLEANED + REMANNG SANDNG OF COMPOSTE AREAS U U

7 B2 - POST STRP TREATMENT PROCESS FLOW N HANGAR ' REMOVE SEALER & CLEAN BETWEEN JONTS [YONTS WPED WTH SOLVENT JONTS LNED OUT & RESEALED CRAFTREMASKED N PREPARATON FOR PANTNG METAL TREATMENT - VENTLATON ON VENTLATON SWTCHED ON DECREASNG WTH TAC TAGS AND SOLVENTS v + F.C.R PRMERS MXED READY FOR USE F.C.R PRMERS APPLED TO TAL, FUSELAGE & WNGS "i COAT DRES 7

8 C SANDNG PROCESS FLOW N HANGAR ARCRAFT MASKED VENTLATON SWTCHED ON PANT REMOVED USNG HAND HELD SANDNG MACHNES POWER WASH 7 REMOVAL OF SOME MASKNG DEGREASNG WTH TAC RAGS AND SOLVANTS

9 D - PANTNG PROCESS FLOW N HANGAR + CFPRMERMXED CFPRMERAPPLED COAT DRES q - PANTMXED PANT GUNS CLEANED PANT APPLED WHERE REQURED ON FUSAGE, WNGS & TALS DRYNG TME.3 TMES NEXT COLOUR VENTLATON OFF v WAT FOR FNAL COAT TO DRY i MASKNG FOR NEXT COLOUR VENTLATONON -, CAN BE REPEATED 5 TMES PANT MXED VENTLATON ON E F

10 HANGAR MATERALS FLOW CHART (2) PPC LCENCE APPLCATON REMANNG PANT & STRPPER REMOVED USNG SQUEEGEES - PLASTC STORED FOR BARRELLNG LlQUlDE WASTE MMEDATELY COLLECTED N DRUMS WATER - turcojet clean WASTE - Scotchbrite pads WATER AR - solvents WASTE E AR - particles POWER WASH WET WASH VENTLATON OFF PUMPS, LANCES & HOSES CLEANED REMANNG SANDNG OF COMPOSTE AREA 4 WASTE - sealer REMOVE SEALER & CLEAN BEETWEN JOTS WASTE - tins AR - solvents JONTS LNED OUT& RESEALED AR - solvents WASTE - sealant, masking tape JONTS WPED WTH SO LV E NT Masking tape, craft paper, Polythene sheets, aluminium foil ARCRAFT REMASKED N PREPARATON FOR PANTNG 3

11 HANGAR MATERALS FLOW CHART (3) PPC LCENCE APPLCATON WASTE -brushes, rags AR - solvents WASTE -tin, rags METAL TREATMENT (LOCALSED) VENTALTON ON VENTLATON SWTCHED ON DEGREASNG WTH RAGS AND SO VFNTS AR - F.C.R Primer b+ WAS'.E - tins F.C.R PRMES MXED READY FOR USE AR F.C.R PRMERS APPLED TO TAL, FUSELAGE,WNGS ARCRAFT MASKED VENTLATON SWTCHED ON WASTE - particles, abrasive discs PANT REMOVED USNG HAND HELD SANDNG MACHNES WATER - particles WASTE - craft paper, aluminium Foil, masking tape, polythene sheet, AR - solvents WASTE - rags, tins DEGREASNG WTH RAGS AND SOLVENTS. WASTE -tins AlK POWER WASH REMOVAL OF SOME MASKNG CF PRMER MXED

12 HANGAR MATERALS FLOW CHART (4) AR AR PPC LCENCE APPLCATON t CF PRMER APPLED COAT DRES PANT GUNS CLEANED AR - solvent AR - solvent AR - solvent aluminium foil, masking tape, craft paper, plastic sheeting WASTE PANT APPLED WHERE REQURED ON FUSELAGE, WNGS &TAL DRYNG TME, WATNG FOR FNAL COAT TO DRY MASKNG FOR NEXT COLOUR PANT GUNS CLEANED PANT MXED LOGOS PANTED AR - solvent WAT TO DRY WASTE - cut offs, LOGOS AFFXED AS LABELS WASTE A R - solvent PANT GUNS CLEANED 4 5

13 HANGAR MATERALS FLOW CHART (5) AR - solvents WASTE -tin AR - solvents PPC LCENCE APPLCATON PANT MXED COAT APPLED TO WHOLE ARCRAFT AR - solvents WAT FOR COAT TO DRY WASTE - craft Daper, masking tape Polythene sheets, aluminium foil FULL DEMASKlNG OF A R C RA FT AR - solvents WASTE - paint brushes, rollers WASTE AR - solvent TECK MARKS APPLED BY HAND PANT GUNS CLEANED HEAT &VENTLATON OFF P 6

14