Narrative:

The delay of the captain's inbound flight delayed our current flight and so the aircraft was quickly boarded and we were made aware of the 'full' status of the aircraft. A flight attendant was among the passengers trying to get on our flight. Several times during the boarding process; while the captain and myself were completing our cockpit duties; the flight attendant presented herself to the cockpit. Captain told her to stand-by so that we could complete required cockpit checks and checklists uninterrupted. Upon completion of our oral briefing the flight attendant reappeared once more; along with the passenger agent who were anxious to close the aircraft door. It was at this point that the possibility of her sitting in a cockpit jumpseat was mentioned. I was made aware of the fact that this flight attendant had been in the cockpit several times that day while complying with a rule which requires a flight attendant to remain in the cockpit should a pilot have to leave to use a restroom. We briefly spoke of new hire flight attendants who sat in the cockpit jumpseat during new hire training for observation and educational purposes. It was not until later; that I realized that we had potentially (unintentionally) possibly not fully abided by the company's operations manual.

Google
 

Original NASA ASRS Text

Title: Air carrier flight crew allows Cabin Attendant to occupy the cockpit jump seat on a flight for which all the cabin seats were occupied.

Narrative: The delay of the Captain's inbound flight delayed our current flight and so the aircraft was quickly boarded and we were made aware of the 'full' status of the aircraft. A Flight Attendant was among the passengers trying to get on our flight. Several times during the boarding process; while the Captain and myself were completing our cockpit duties; the Flight Attendant presented herself to the cockpit. Captain told her to stand-by so that we could complete required cockpit checks and checklists uninterrupted. Upon completion of our oral briefing the Flight Attendant reappeared once more; along with the Passenger Agent who were anxious to close the aircraft door. It was at this point that the possibility of her sitting in a cockpit jumpseat was mentioned. I was made aware of the fact that this Flight Attendant had been in the cockpit several times that day while complying with a rule which requires a Flight Attendant to remain in the cockpit should a pilot have to leave to use a restroom. We briefly spoke of new hire Flight Attendants who sat in the cockpit jumpseat during new hire training for observation and educational purposes. It was not until later; that I realized that we had potentially (unintentionally) possibly not fully abided by the company's Operations Manual.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.