Head tilt Chin Lift Maneuver Unless you suspect a Head Neck Injury then do Jaw Thrust Maneuver.
In the Jaw Thrust maneuver, the head is tilted back in order to facilitate opening the airway. The Modified Jaw Thrust is similar except there is no tilting of the head back. The rescuer/clinician should attempt to anteriorly position the lower jaw without moving the rest of the head. One should use the Modified Jaw Thrust in cases where a cervical spine injury is suspected.
jaw-thrust maneuver
The jaw thrust maneuver is an alternative method to open the airway.
One way is to use the head tilt chin lift maneuver but if the person has a risk of a spinal injury then you should use the jaw thrust maneuver.
Jaw-Thrust Technique
jaw-thrust maneuver
Use the jaw thrust technique on a person with a suspected neck or back injury.
The head and neck are stabilized by your hands while simultaneously performing the maneuver. Commercial devices can also be used such as cervical collars, etc...
If you are referring to airway management - jaw-thrust is the preferred initial action. The appropriate maneuver for laryngoscopy is MILS - manual in-line stabilization (better see a video / picture).
jaw-thrust
The Heimlich Maneuver.