European safety regulators are proposing to order Airbus A300 and A310 operators to improve ice protection of angle-of-attack sensors.
The measure comes ahead of new general regulations centred on ensuring that aircraft are able to cope in icing conditions.
Under the proposed directive the European Aviation Safety Agency will instruct carriers to fit new conic plates and protection covers to A300 variants as well as A310s.
Ice accretion on angle-of-attack sensors could lead to non-activation of automatic protection systems, warns EASA.
Operators would have three years to make the modifications. EASA is inviting comments on the proposal until 6 December.