I was on a PSA operated CR9 today. I bought two business class for myself and infant.
It was my intention the infant sit in her FAA approved car seat at the window.

I was settled in and the flight attendant came by and said she wasn't sure a car seat was allowed. I explained I was certain it was but she said she had to check with the other flight attendant.
She then went to the flight deck to consult with the Captain.

She came back and told me, quite sure of herself, that under no uncertain terms the baby was only allowed in the car seat during flight when the aircraft was at cruise altitude.
The baby, she informed me, had to held during taxi, take-off and landing or when the seatbelt sign was on as this was much more secure and safe for the baby. This is absolute rubbish.

While I thought about what to do, I sent AA a DM via twitter. As expected, I got an immediate response saying their crew member was incorrect.

I replied that arguing could very well get me kicked off and or worse get me arrested for a federal offense if I violated a crewmember's order.

I can't believe, that even with two new crewmembers, that neither were trained in car seats and the flight deck crew didn't know either.

It really makes we wonder about PSA/AA. I'm upset I didn't push it but I was worried about the repurcussions about getting into any kind of discussion. I paid for a 2nd seat and didn't get any of the safety benefits.