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Luminous blue variables (LBVs) are evolved massive stars close to theEddington limit, with a distinct spectroscopic and photometric variabilityhaving unsteady mass-loss rates. These stars show a considerable change intheir surface temperature from quiescent to outbursts phase. The cause ofirregular variability and unsteady mass-loss rate is not properly understood.Here we present the result of linear stability analysis in two LBVs AF And andR 127 during their quiescent and outburst phase. We note that several modes areunstable in the models of the considered LBVs. Mode interaction is frequent inthe modal diagrams for the models of both LBVs. For AF And, number ofinstabilities increase in models having temperature below 15000 K. The foundinstabilities may be linked with the observed irregular variabilities andsurface eruptions. Observational facilities of Belgo-Indian Network forAstronomy and Astrophysics (BINA) will be very beneficial to study thespectroscopic and photometric behavior of the considered LBVs.

Study of instabilities and outbursts in luminous blue variables AF And $\&$ R 127