State the steps taken for a surface crack on a propeller blade found during dry dock inspection?

flowchart TD
    A["Stop work on blade"] --> B["Clean & perform LIQUID DYE PENETRANT TEST per ISO 3452-1:2013"]
    B --> C["Record crack: blade, zone, length, orientation"]
    C --> D["Inform Company & Class immediately"]
    D --> E["Class surveyor attends & agrees repair per UR W24"]
    E --> F["Repair: grinding, welding with stress relief, or replace"]
    F --> G["Re-test by penetrant, check balance & section"]
    G --> H["Close out under SMS with records"]

• Trap: Cracks are FATIGUE DEFECTS under IACS UR W24—MUST BE REPAIRED with class approval.
• Zones: A (high stress, welding GENERALLY NOT PERMITTED), B (welding with PRIOR CLASS APPROVAL), C (welding FREELY PERMITTED).
• Repair: Grinding first; welding only with STRESS RELIEF (except Ni-Al-bronze CU3).
• Acceptance: Post-repair LIQUID PENETRANT TEST—max 7 indications/100 cm² (linear ≤2, ≤3 mm).
• Records: ISM 9.2 & 10.2 require full documentation.