Narrative:

We arrived this morning at which point we were expected to overnight here; so we secured the airplane and put a left engine cover in; right cover was inoperative so it was not used. We have unloaded our luggage from the airplane as well. In a short while we were informed by dispatch that we will reposition tonight. At this point; captain and flight attendant's luggage was on the baggage cart at the FBO along with some supplies we've bought for the airplane. My luggage was already inside the cabin. Captain told me to go and get the airplane ready inside and he would take care of the luggage. We all walked out together out of the FBO and I proceeded directly to the cockpit to get the airplane ready; get clearance; etc. I did not do an exterior preflight of the airplane. I've assumed that since captain remained outside that he will do an exterior preflight of the airplane and remove the engine cover since it was right over the luggage compartment. I should have asked the captain if he did his preflight or done my own. Captain remained outside loading their luggage into the baggage compartment which was right under the left engine with the cover inserted in the front and sticking out with big red flags. After a few minutes he returned to the cabin and closed the airplane door and told me that we were ready to go. At this point I assumed that since he closed the door and told me that we were ready that he had done his preflight and made sure that airplane was ready for flight. After that we proceeded with airplane start. First we started the right engine as we usually do and had no problems. After we started the left engine airplane rumbled for a second and a line guy indicated to us to shut down. We stop the engines and opened the airplane door; after that we have realized that the left engine cover had not been removed. I believe that mistakes were made by both crew members; most importantly communication break down between the crew members.

Google
 

Original NASA ASRS Text

Title: A G200 crew prepared the aircraft to overnight; but when unexpectedly called back to ferry it they did not complete an exterior preflight and started the left engine with the engine cover on.

Narrative: We arrived this morning at which point we were expected to overnight here; so we secured the airplane and put a left engine cover in; right cover was INOP so it was not used. We have unloaded our luggage from the airplane as well. In a short while we were informed by Dispatch that we will reposition tonight. At this point; Captain and Flight Attendant's luggage was on the baggage cart at the FBO along with some supplies we've bought for the airplane. My luggage was already inside the cabin. Captain told me to go and get the airplane ready inside and he would take care of the luggage. We all walked out together out of the FBO and I proceeded directly to the cockpit to get the airplane ready; get clearance; etc. I did not do an exterior preflight of the airplane. I've assumed that since Captain remained outside that he will do an exterior preflight of the airplane and remove the engine cover since it was right over the luggage compartment. I should have asked the Captain if he did his preflight or done my own. Captain remained outside loading their luggage into the baggage compartment which was right under the left engine with the cover inserted in the front and sticking out with big red flags. After a few minutes he returned to the cabin and closed the airplane door and told me that we were ready to go. At this point I assumed that since he closed the door and told me that we were ready that he had done his preflight and made sure that airplane was ready for flight. After that we proceeded with airplane start. First we started the right engine as we usually do and had no problems. After we started the left engine airplane rumbled for a second and a line guy indicated to us to shut down. We stop the engines and opened the airplane door; after that we have realized that the left engine cover had not been removed. I believe that mistakes were made by both crew members; most importantly communication break down between the crew members.

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.