An mdt air carrier crew had part of their right engine cowling fly off during takeoff.

Attributes
ACN	213794
Time
Date	199206
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : stl
State Reference	MO
Altitude	agl bound lower : 0 agl bound upper : 500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : stl tower : stl
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : initial climbout : takeoff landing other
Route In Use	arrival other departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 245 flight time total : 6200 flight time type : 2100
ASRS Report	213794
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : cfi pilot : instrument
Experience	flight time last 90 days : 225 flight time total : 3500 flight time type : 700
ASRS Report	213559
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance flight crew : declared emergency none taken : anomaly accepted
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

The aircraft we were flying had just had maintenance performed on the right engine's fuel system. To do that, they removed the upper right part of the engine cowling. Upon finishing the repair and clearing the write-up, the first officer and myself headed out to the aircraft. He (first officer) had to run back in for something so I went out performed a walk around and visually checked the cowl to make sure it was secure. All fasteners that I could see were lined up with the marks on the cowl (to show they were secure), and I also pushed on the cowl with no movement noted. I got into the aircraft and the first officer came out and he also checked the aircraft, including the cowling. Well you can see what comes next. On takeoff and initial climb out the said cowling piece came off in-flight. We noted no abnormal vibrations or anything -- returned to stl with no further incident. How to correct this. I don't know. Short of me going out with a screwdriver and checking every turn/lock connector on the aircraft. To a large extent, we rely on the mechanics sign off and faith they do their jobs 100 percent right. But it is a real world out there. I did my part -- looking at the cowl, checking what fasteners I could and touching said cowling with no movement noted.

Original NASA ASRS Text

Title: AN MDT ACR CREW HAD PART OF THEIR R ENG COWLING FLY OFF DURING TKOF.

Narrative: THE ACFT WE WERE FLYING HAD JUST HAD MAINT PERFORMED ON THE R ENG'S FUEL SYS. TO DO THAT, THEY REMOVED THE UPPER R PART OF THE ENG COWLING. UPON FINISHING THE REPAIR AND CLRING THE WRITE-UP, THE FO AND MYSELF HEADED OUT TO THE ACFT. HE (FO) HAD TO RUN BACK IN FOR SOMETHING SO I WENT OUT PERFORMED A WALK AROUND AND VISUALLY CHKED THE COWL TO MAKE SURE IT WAS SECURE. ALL FASTENERS THAT I COULD SEE WERE LINED UP WITH THE MARKS ON THE COWL (TO SHOW THEY WERE SECURE), AND I ALSO PUSHED ON THE COWL WITH NO MOVEMENT NOTED. I GOT INTO THE ACFT AND THE FO CAME OUT AND HE ALSO CHKED THE ACFT, INCLUDING THE COWLING. WELL YOU CAN SEE WHAT COMES NEXT. ON TKOF AND INITIAL CLBOUT THE SAID COWLING PIECE CAME OFF INFLT. WE NOTED NO ABNORMAL VIBRATIONS OR ANYTHING -- RETURNED TO STL WITH NO FURTHER INCIDENT. HOW TO CORRECT THIS. I DON'T KNOW. SHORT OF ME GOING OUT WITH A SCREWDRIVER AND CHKING EVERY TURN/LOCK CONNECTOR ON THE ACFT. TO A LARGE EXTENT, WE RELY ON THE MECHS SIGN OFF AND FAITH THEY DO THEIR JOBS 100 PERCENT RIGHT. BUT IT IS A REAL WORLD OUT THERE. I DID MY PART -- LOOKING AT THE COWL, CHKING WHAT FASTENERS I COULD AND TOUCHING SAID COWLING WITH NO MOVEMENT NOTED.

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.