Pepa Demands Southwest Investigation

Last month Salt -N- Pepa rapper, Sandy 'Pepa' Denton was escorted off her Southwest Airlines flight after refusing to give up one of her two seats [click here if you missed that]. 

Now Denton wants a full investigation...

From TMZ 

In a legal letter obtained by TMZ ... Pepa's lawyers call on Southwest to get the ball rolling on investigating her removal from a July flight ... echoing her previous sentiments that a male agent engaged in "inappropriate and unnecessary action" in handling the situation.

The attorneys are going after Southwest with a number of allegations ... including their belief Sandra was racially profiled and discriminated against during the encounter. They've also called into question how certain policies were enforced.

In the letter, Pep's attorneys say she's suffered from embarrassment, harassment, and loss of income over the ordeal ... and so, they want Southwest to look into everything that happened -- and provide "fair and transparent resolution" of the matter.

They also put the airline on notice that it should preserve all evidence and prevent the destruction and/or loss of any info tied to the matter.

Translation: We might sue ya, Southwest, so keep all potential evidence handy for a trial.

Her legal team is giving Southwest until the end of the month to respond to the letter.