Does your pairing have you dhing at the end of the duty period, or laying over prior to the dh?
The reason that I ask is that the 11:30 duty applies only to a scheduled dh at the end of the duty period, not deviating same duty period on your own.
4.Class of Service for Commercial Deadhead Travel
Requirements regarding class of service shall apply when the deadhead is scheduled. The Company shall not be in violation of this Section due to operational changes or conditions imposed by passenger carriers after the deadhead is scheduled (e.g., increased or reduced block time). Regardless of whether such changes occur, a pilot’s deviation allowance is based on the class of service authorized in the original schedule. a.Deadhead travel shall be booked in coach class unless a higher class of service is authorized.
b.A class of service higher than coach shall be authorized if: i. a deadhead exceeds 5 scheduled block hours; or
ii. a deadhead is included in a single duty period exceeding 11:30;