B767 crew had the pack access door separate from the aircraft in-flight.

Attributes
ACN	553467
Time
Date	200207
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zau.artcc
State Reference	IL
Altitude	msl bound lower : 20000 msl bound upper : 24000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau.artcc
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain
Qualification	pilot : atp
ASRS Report	553467
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
ASRS Report	553468
Events
Anomaly	aircraft equipment problem : less severe maintenance problem : improper maintenance other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : training performance deficiency : inspection
Supplementary
Problem Areas	Company Aircraft Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

On descent, we heard a loud bang. We thought it was a cargo bin shifting in forward cargo. All indications of pressurization, hydraulics, and engine were normal. No EICAS messages or other warning at all. On postflt, found the left air conditioning pack door missing. The event occurred approximately 1/2 way between jvl VOR and vikng intersection and between approximately FL240 and FL200.

Original NASA ASRS Text

Title: B767 CREW HAD THE PACK ACCESS DOOR SEPARATE FROM THE ACFT INFLT.

Narrative: ON DSCNT, WE HEARD A LOUD BANG. WE THOUGHT IT WAS A CARGO BIN SHIFTING IN FORWARD CARGO. ALL INDICATIONS OF PRESSURIZATION, HYDS, AND ENG WERE NORMAL. NO EICAS MESSAGES OR OTHER WARNING AT ALL. ON POSTFLT, FOUND THE L AIR CONDITIONING PACK DOOR MISSING. THE EVENT OCCURRED APPROX 1/2 WAY BTWN JVL VOR AND VIKNG INTXN AND BTWN APPROX FL240 AND FL200.

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.