Narrative:

During a non scheduled charter flight to aca, the captain allowed passenger to enter the cockpit and observe the flight. The captain allowed passenger to occupy his seat during cruise and have their picture taken. The problem was that the cockpit crew was reassigned to aca during a last min schedule change. I was unfamiliar with international charter procedures and rules and we were 6 hours late, so in my haste I did not protest letting passenger into cockpit. After the flight I confirmed that we were wrong.

Google
 

Original NASA ASRS Text

Title: NON ESSENTIAL COCKPIT OCCUPANT ON A CHARTERED B-757 TO ACA, FO.

Narrative: DURING A NON SCHEDULED CHARTER FLT TO ACA, THE CAPT ALLOWED PAX TO ENTER THE COCKPIT AND OBSERVE THE FLT. THE CAPT ALLOWED PAX TO OCCUPY HIS SEAT DURING CRUISE AND HAVE THEIR PICTURE TAKEN. THE PROB WAS THAT THE COCKPIT CREW WAS REASSIGNED TO ACA DURING A LAST MIN SCHEDULE CHANGE. I WAS UNFAMILIAR WITH INTL CHARTER PROCS AND RULES AND WE WERE 6 HRS LATE, SO IN MY HASTE I DID NOT PROTEST LETTING PAX INTO COCKPIT. AFTER THE FLT I CONFIRMED THAT WE WERE WRONG.

Data retrieved from NASA's ASRS site as of July 2007 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.