<< >> NASA ASRS Report 457152, December 1999

A B727-200 in descent at FL200 experienced aircraft vibration caused by an open hydraulic service door. Door departed the aircraft.

Attributes
ACN	457152
Time
Date	199912
Day	Sun
Local Time Of Day	1201 To 1800
Place
Altitude	msl single value : 20000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma.artcc
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	descent : vacating altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	457152
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine
ASRS Report	457151
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Consequence	other other
Supplementary
Problem Areas	Flight Crew Human Performance Maintenance Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

Upon arrival at gate in mia, maintenance informed us that the hydraulic fluid service panel was missing and probably torn off. We had felt a vibration during descent and concluded it must have blown off at this point. No hydraulic service had been performed in bze. It is possible that door was opened for security check and never closed. Flight engineer had done preflight early and did not notice that the door was open at that time.

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Original NASA ASRS Text

Title: A B727-200 IN DSCNT AT FL200 EXPERIENCED ACFT VIBRATION CAUSED BY AN OPEN HYD SVC DOOR. DOOR DEPARTED THE ACFT.

Narrative: UPON ARR AT GATE IN MIA, MAINT INFORMED US THAT THE HYD FLUID SVC PANEL WAS MISSING AND PROBABLY TORN OFF. WE HAD FELT A VIBRATION DURING DSCNT AND CONCLUDED IT MUST HAVE BLOWN OFF AT THIS POINT. NO HYD SVC HAD BEEN PERFORMED IN BZE. IT IS POSSIBLE THAT DOOR WAS OPENED FOR SECURITY CHK AND NEVER CLOSED. FE HAD DONE PREFLT EARLY AND DID NOT NOTICE THAT THE DOOR WAS OPEN AT THAT TIME.

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.