#2 engine cowling came open in flight at 10000' MSL. Returned to stl.

Attributes
ACN	180817
Time
Date	199106
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : stl
State Reference	MO
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : stl
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : takeoff climbout : intermediate altitude landing other
Route In Use	enroute airway : stl enroute airway : ztl
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 174 flight time total : 2300 flight time type : 450
ASRS Report	180817
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 210 flight time total : 4000 flight time type : 1600
ASRS Report	180508
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

While in level flight at 10000' MSL between st louis and rolla, mo, part of the #2 engine cowling came open. We know that it came open in flight because while level at 10000' in smooth air the aircraft suddenly lifted up and yawed to the left. Once we found the problem, we slowed the aircraft and did a descending right turn and went back to stl and landed. During preflight of the aircraft, all access doors, cargo doors, gear doors and engine cowlings were latched, shut and looked normal.

Original NASA ASRS Text

Title: #2 ENGINE COWLING CAME OPEN IN FLT AT 10000' MSL. RETURNED TO STL.

Narrative: WHILE IN LEVEL FLT AT 10000' MSL BTWN ST LOUIS AND ROLLA, MO, PART OF THE #2 ENG COWLING CAME OPEN. WE KNOW THAT IT CAME OPEN IN FLT BECAUSE WHILE LEVEL AT 10000' IN SMOOTH AIR THE ACFT SUDDENLY LIFTED UP AND YAWED TO THE LEFT. ONCE WE FOUND THE PROB, WE SLOWED THE ACFT AND DID A DSNDING RIGHT TURN AND WENT BACK TO STL AND LANDED. DURING PREFLT OF THE ACFT, ALL ACCESS DOORS, CARGO DOORS, GEAR DOORS AND ENG COWLINGS WERE LATCHED, SHUT AND LOOKED NORMAL.

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.