Aircraft Structure Repair Manual (ASRM) Overview
📌 The Airbus A320 Family Structure Repair Manual is a non-customized manual common for the entire aircraft type, unlike illustrated parts catalogs that reference specific serial numbers.
📌 The manual provides information for the identification, allowable damage, and repair procedures for primary and secondary aircraft structures.
📌 Page identification uses a six-digit code: the first two digits denote the chapter (e.g., 53 for fuselage), the third indicates the specific section/area, and the last three digits detail the structure element or part (e.g., skin plates).

Damage Categorization and Causes
💥 Damage is defined as any deformation across any cross-section of structural components, categorized into four main cause groups.
💥 Group A covers mechanical action (e.g., impact from sharp tools), Group B covers chemical/electrochemical reactions (e.g., corrosion near batteries), Group C covers thermal action/cycling, and Group D covers inherent material characteristics.
💥 Damage evaluation classifies damage as repairable damage, allowable damage, or non-allowable/non-repairable damage, the latter requiring component removal.

Types of Structural Damage
🔨 Common damage types include scratches (requiring length, width, and depth measurements), dents (localized inward deformation with no cross-sectional change), and cracks (a partial or complete fracture).
🔨 Other recognized damages include necking (small material decrease at an edge), distortion (twisting or bending), corrosion, crease (folding back on itself), abrasion (surface removal due to rubbing), delamination (separation in composite/honeycomb structures), and fretting (surface damage at joints).

Damage Recording and Classification
📝 A suggested method for recording damage involves creating a Dent and Bulk Chart to list all damages, their descriptions, and the corresponding repair status.
📝 This chart should include fields for damage type, size, description, action taken, classification category, date, and structural repair reference number.
📝 Damage classification for repair purposes is broadly divided into major and minor categories.

Key Points & Insights
➡️ Always begin an inspection route from a known point, such as the left side near the nose landing gear, and complete a full circuit.
➡️ When documenting a scratch, ensure all three dimensions (length, width, and depth) are measured and recorded.
➡️ Non-repairable damage necessitates the complete removal of the damaged component.

📸 Video summarized with SummaryTube.com on Nov 16, 2025, 14:48 UTC