ElitePilot
From the Airbus submission to the NTSB:
"Despite suffering bird(s) ingestion in both engines, the engines did not
suffer any uncontained failure but continued to deliver hydraulic and
electrical power (engine N°1 N2 was high enough, up to the re-start
attempt, for its IDG to remain on-line).
From the time Flight 1549 suffered birds ingestion into both engines until
it finally impacted the water, the Aircraft flight controls always remained
in Normal law with hydraulic power available.
The early APU start initiated by the Captain, allowed the Aircraft to
remain in Normal law during and after the engine N°1 re-start attempt."