Inner right hand cowl door separated from the small transport aircraft in flight.

Attributes
ACN	106565
Time
Date	198903
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : bed
State Reference	MA
Altitude	msl bound lower : 11000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : bed artcc : zob
Operator	general aviation : corporate
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Navigation In Use	Other
Flight Phase	descent other landing other
Route In Use	enroute : direct enroute airway : zbw
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 225 flight time total : 20440 flight time type : 1900
ASRS Report	106565
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

IFR flight plan bwi to bed FL250. Cleared to descend to cross hfd VOR at 11000 by boston center. Shortly after leveling at 11000, the inner right hand cowl door separated from the aircraft. Checked with flashlight wing not damaged aircraft control normal. Reduced airspeed to 160 and flew on to bed normal landing at bed. Contributing factor: preflight at bwi interrupted by line crew. May not have closed all cowl latches? Correction action: with any interruption start preflight from page one. Same with checklist.

Original NASA ASRS Text

Title: INNER RIGHT HAND COWL DOOR SEPARATED FROM THE SMT ACFT IN FLT.

Narrative: IFR FLT PLAN BWI TO BED FL250. CLRED TO DSND TO CROSS HFD VOR AT 11000 BY BOSTON CENTER. SHORTLY AFTER LEVELING AT 11000, THE INNER RIGHT HAND COWL DOOR SEPARATED FROM THE ACFT. CHECKED WITH FLASHLIGHT WING NOT DAMAGED ACFT CONTROL NORMAL. REDUCED AIRSPEED TO 160 AND FLEW ON TO BED NORMAL LNDG AT BED. CONTRIBUTING FACTOR: PREFLT AT BWI INTERRUPTED BY LINE CREW. MAY NOT HAVE CLOSED ALL COWL LATCHES? CORRECTION ACTION: WITH ANY INTERRUPTION START PREFLT FROM PAGE ONE. SAME WITH CHECKLIST.

Data retrieved from NASA's ASRS site as of August 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.