Structural repair notes
Browse concise aircraft structure, damage, fastener and repair-topic summaries. These pages support learning only; current approved aircraft data and company procedures always take precedence.
SRM topics
FASTENER IDENTIFICATIONFastener Part Number IdentificationA family-safe guide to supported shank-diameter and maximum-grip or length codes without guessing unverified letters.RIVET IDENTIFICATIONAluminium Rivet Alloy and MarkingGeneral identification of common aluminium solid-rivet alloy markings.FUSELAGE SKIN INSPECTIONPossible Fuselage Skin DamageInitial identification of punctures, nicks, gouges, scratches, corrosion, dents and cracks.AIRCRAFT FUNDAMENTALSClassification of AircraftAircraft grouped by supporting force and wing construction or movement.STRUCTURAL LOADSBasic Stresses on Aircraft StructureTension, compression, shear, bending and torsion in aircraft structure.AIRFRAME CONSTRUCTIONMain Structural Components of Fixed-Wing AircraftFuselage, wing, landing gear, stabilizers and flight-control surfaces.WING ARRANGEMENTWing ConfigurationLow, high, mid, dihedral, gull and inverted-gull wing arrangements.AIRCRAFT CONTROLFlight ControlsPrimary, secondary and auxiliary flight-control surfaces.AIRCRAFT REFERENCE SYSTEMFuselage Stations and Reference LinesStations, buttock lines and water lines used to locate aircraft structure.STRUCTURAL LOAD PATHPrimary and Secondary StructureGeneral distinction between principal load-carrying and supporting structure.SRM REPAIR CLASSIFICATIONStructural Repair DefinitionsGeneral damage-tolerance and repair-durability terminology.DAMAGE DISPOSITIONMetallic Structure Damage ClassificationGeneral distinction between allowable, repairable and replacement damage.DRILLING PRACTICEHole Preparation for Protruding-Head RivetsGeneral drilling, finishing, deburring and cleanliness considerations.FASTENER CONDITIONSolid Rivet InspectionShop-head formation, dimensions and surrounding-joint condition.FASTENER REMOVALSolid Rivet RemovalGeneral principles for removing a rivet while protecting the hole and structure.AIRCRAFT MATERIALSMetal Alloy DescriptionsGeneral overview of aluminium, Alclad, titanium and steel alloy families.GENERAL REPAIR WORKFLOWGeneral Fuselage Skin Repair StepsA high-level workflow from access and assessment through installation and inspection.FASTENER LAYOUTFastener Edge MarginDefinition of distance from fastener-hole centre to the nearest structural edge.FASTENER LAYOUTRivet Spacing and PitchCentre-to-centre spacing used to distribute load through a fastened joint.EXTERNAL REPAIRExternal Doubler ChamferingGeneral purpose of a controlled transition at an external doubler edge.METALLIC DAMAGE REMOVALNicks, Scratches and GougesGeneral principles for inspecting and reworking metallic nicks, scratches and gouges.CRACK CONTROLCracks and Stop-DrillingSafe training boundaries for crack assessment and authorised stop-drilling.METALLIC DENTSDent Inspection, Rework and FillingGeneral assessment principles for metallic dents, rework and contour filling.CORROSION CONTROLCorrosion Removal and RestorationA general corrosion-removal sequence for aircraft metallic structure.STRUCTURE SEALINGStructural Sealant and Seal RestorationGeneral structural sealing, sealant-removal and seal-restoration principles.FASTENER PRACTICEFastener Condition and Installation ControlsGeneral fastener looseness indicators, classifications and installation controls.FASTENER SUBSTITUTIONEquivalent and Alternative FastenersGeneral distinction between equivalent and alternative aircraft fasteners.FASTENER HOLE FITSClearance, Close-Ream, Transition and Interference FitsDefinitions of common clearance, close-ream, transition and interference fastener-hole fits.SURFACE PROTECTIONProtective Treatment After Structural ReworkGeneral surface-protection principles after structural repair or rework.GEOMETRY CHECKSAircraft Symmetry and Incidence ChecksGeneral preparation and measurement principles for aircraft symmetry and incidence checks.AIRCRAFT SUPPORTSupporting an Aircraft for Major Structural WorkGeneral principles for aircraft support and alignment during major structural repair.CONTROL SURFACE BALANCEControl-Surface Static BalanceGeneral static-balance concepts for repaired or repainted aircraft control surfaces.FLUID LINESAircraft Fluid-Line Identification and MaterialsGeneral identification, construction and material considerations for aircraft fluid lines.FLUID-LINE FITTINGSAircraft Tube and Hose FittingsGeneral aircraft fluid-line fitting types and their controlled installation needs.FLUID-LINE WORKFluid-Line Installation and FabricationGeneral controls for aircraft fluid-line installation, fabrication and testing.TUBE FORMINGTube Bending, Flaring and Flareless PresetGeneral quality controls for aircraft tube bending, flaring and flareless sleeve preset.FLUID-LINE INSPECTIONFluid-Line Inspection and TestingGeneral inspection areas and testing boundaries for aircraft rigid tubes and flexible hoses.SRM USESRM Navigation and Revision ControlA general method for navigating structural repair data and confirming revision status.ASSEMBLY AND HANDLINGAircraft Assembly and Major-Component HandlingGeneral planning and control principles for aircraft assembly and major-component handling.MECHANICAL FLIGHT CONTROLSControl Cables, Routing Hardware and Rigging ChecksGeneral construction, routing and rigging principles for aircraft mechanical control cables.STRUCTURAL INSPECTIONVisual, NDT and Environmental-Damage InspectionGeneral selection and boundaries for visual, NDT, lightning and heat-damage inspection.COMPOSITE MATERIAL CONTROLComposite Material Families, Storage and HandlingGeneral identification, storage, exposure tracking and safe handling for composite repair materials.AERODYNAMIC SURFACE QUALITYAerodynamic Smoothness and Surface RestorationGeneral evaluation principles for aerodynamic smoothness, contour and exterior repair finish.