large flock of starlings (very small birds?) went into all four Allison engines of an Eastern Airlines Lockhhed Electra turboprop many years ago above Boston harbor. They seem to have caused all four engines to quickly fail-there were no survivors () .
I think your talking about N5533 on 4oct 1960. It hit between 75 and 100 starlings. The no 1 took at least 4 birds and autofeathered, no 2 took about 6 and failed and no 4 was damaged. The aircraft was below Vmca for 2 eng out which depending on bank angle can range from 125 - 154 knots. The only way to recover the aircraft would have been to close the power lever on one of the starboard engines however with only 12 seconds or so avaliable the crew were faced with an impossible challange. There were 10 survivors out of 67 pax and 5 crew.