Cargo air carrier aircraft loses 4 access panels in-flight.

Attributes
ACN	316163
Time
Date	199509
Day	Tue
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : day
State Reference	OH
Altitude	msl bound lower : 12000 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : day
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude other other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 16000 flight time type : 3000
ASRS Report	316163
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	other Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Picked up aircraft from 'B' check at dayton. On climb out at 12000 ft MSL and 300 KTS heard a loud noise. Returned for landing and found that 4 access panels located on the belly of the aircraft had blown off the aircraft. These loose panels could not be seen on preflight because the mechanic had secured all 4 panels by one screw (swing down panels).

Original NASA ASRS Text

Title: CARGO ACR ACFT LOSES 4 ACCESS PANELS INFLT.

Narrative: PICKED UP ACFT FROM 'B' CHK AT DAYTON. ON CLBOUT AT 12000 FT MSL AND 300 KTS HEARD A LOUD NOISE. RETURNED FOR LNDG AND FOUND THAT 4 ACCESS PANELS LOCATED ON THE BELLY OF THE ACFT HAD BLOWN OFF THE ACFT. THESE LOOSE PANELS COULD NOT BE SEEN ON PREFLT BECAUSE THE MECH HAD SECURED ALL 4 PANELS BY ONE SCREW (SWING DOWN PANELS).

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.