Crack noted on wall at lintel height.
Step 1 : Making 2 mm groove along the crack till the depth of plaster.
Step 2 : Cleaning & Sealing the crack with ready to use 'crack seal' as per manufacturer's specification.
Step 3 : Primer & paint finishing as per manufacturer's specification.
Meaning of Lintel
A horizontal support of timber, stone, concrete, or steel across the top of a door or window.