One letter makes a difference

A red "X" in the status box denotes that there are discrepancies significant enough to ground an aircraft. A red "/" denotes discrepancies that are not significant enough to ground the aircraft. If there are zero discrepancies of any kind, the form is reviewed and annotated with the initial of the crew chief on duty -- this is known as a "black-letter initial." Most crew chiefs go their entire careers without this ever happening, but Staff Sgt. Justin Siapno, 352nd Special Operations Maintenance Squadron Dedicated Crew Chief, and his assistant DCCs Senior Airmen Thomas Gillen and Eric Irizarry, accomplished a black-letter initial flight July 6, on tail number 64-4854, a 47-year-old MC-130P Combat Shadow.