An American Airlines scheduled flight operating from Los Angeles to Boston has declared an emergency after departure and is currently initiating a return.
American Airlines flight AA1632, an Airbus A321-200 out of Los Angeles (LAX) enroute to Boston Logan International Airport (BOS) declared a general emergency, squawking 7700 on climb in the California region.

The aircraft was climbing through FL290 (29,000 feet) before declaring an emergency and executing a return to Los Angeles.
Flight AA1632 had departed LAX normally at approximately 07:15 local and was approximately 30 minutes into the scheduled flight and passing through FL290 when it declared the emergency.
The nature of the emergency is unclear at this stage, as the flight continues to make good it’s return to LAX airport.

The aircraft in question is American Airlines Airbus A321-231, registered N106NN; a 9-year old airplane.

Weather is VFR (visual) conditions for the flight’s return to LAX, and AA1632 has subsequently made an uneventful approach and landed on RWY 25R.
AviationSource will approach American Airlines for a comment on the nature of the emergency, with this still unclear at this time.
It is clear however that the emergency was serious enough to force a return back to Los Angeles.
This is a developing story. Please check back for updates.