A BA41 jetstream was flown 2 flts with 18 fasteners missing from the right engine cowling.

Attributes
ACN	365417
Time
Date	199704
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : stl
State Reference	MO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Jetstream 41
Operating Under FAR Part	Part 135
Navigation In Use	Other Other
Flight Phase	other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 2500 flight time type : 350
ASRS Report	365417
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 1800
ASRS Report	365424
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated Other
Supplementary
Air Traffic Incident	Pilot Deviation

Narrative:

It came to my attention that a ramp check was performed by the FAA on aircraft X (jetstream 41) while on the ramp at st louis lambert international airport on the morning of apr zz 1997. The inspection revealed that 18 screws were missing from the right engine cowling. The night prior (apr yy 1997), after a meticulous preflight inspection which did not reveal any missing screws, I took the airplane from st louis to bloomington, il, where it stayed overnight. It was only the next day (apr zz 1997) that another crew brought the aircraft back from bloomington to st louis and that the FAA ramp check revealed the missing screws. Callback conversation with reporter revealed the following information: flew the airplane from bmi to stl and later heard the airplane had flown 2 flts with 18 fasteners missing from the right engine cowling. My first officer did not discover the missing fasteners on his preflight walkaround check. I checked with maintenance and was told that prior to the flight stl to bmi the right engine gearbox was replaced. The first officer on the stl to bmi also did not observe the missing fasteners.

Original NASA ASRS Text

Title: A BA41 JETSTREAM WAS FLOWN 2 FLTS WITH 18 FASTENERS MISSING FROM THE R ENG COWLING.

Narrative: IT CAME TO MY ATTN THAT A RAMP CHK WAS PERFORMED BY THE FAA ON ACFT X (JETSTREAM 41) WHILE ON THE RAMP AT ST LOUIS LAMBERT INTL ARPT ON THE MORNING OF APR ZZ 1997. THE INSPECTION REVEALED THAT 18 SCREWS WERE MISSING FROM THE R ENG COWLING. THE NIGHT PRIOR (APR YY 1997), AFTER A METICULOUS PREFLT INSPECTION WHICH DID NOT REVEAL ANY MISSING SCREWS, I TOOK THE AIRPLANE FROM ST LOUIS TO BLOOMINGTON, IL, WHERE IT STAYED OVERNIGHT. IT WAS ONLY THE NEXT DAY (APR ZZ 1997) THAT ANOTHER CREW BROUGHT THE ACFT BACK FROM BLOOMINGTON TO ST LOUIS AND THAT THE FAA RAMP CHK REVEALED THE MISSING SCREWS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: FLEW THE AIRPLANE FROM BMI TO STL AND LATER HEARD THE AIRPLANE HAD FLOWN 2 FLTS WITH 18 FASTENERS MISSING FROM THE R ENG COWLING. MY FO DID NOT DISCOVER THE MISSING FASTENERS ON HIS PREFLT WALKAROUND CHK. I CHKED WITH MAINT AND WAS TOLD THAT PRIOR TO THE FLT STL TO BMI THE R ENG GEARBOX WAS REPLACED. THE FO ON THE STL TO BMI ALSO DID NOT OBSERVE THE MISSING FASTENERS.

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.