What is the first action in the oxygen mask donning procedure?

In the oxygen mask donning procedure, it is crucial to ensure clear communication and prevent interference before donning the mask. Removing the headset allows for easy access to the oxygen mask and ensures that any potential noise from the mask does not interfere with communication. This step helps to keep the emergency procedures orderly and efficient.

Once the headset is removed, the proper sequence involves putting on the oxygen mask next, followed by switching the mask/mic and restoring the headset as needed. Therefore, starting with the removal of the headset is indeed the logical and correct first action in this emergency procedure.