Precautionary landing made when noise emanating from aft baggage compartment sounded like a person thumping on floor. Coincidentally, departure station announced that they were missing a ramp agent.

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Attributes
ACN	117805
Time
Date	198907
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ind
State Reference	IN
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : private pilot : instrument pilot : commercial pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 180 flight time total : 8000 flight time type : 3000
ASRS Report	117805
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

During cruise advised by F/a of loud thumping coming from aft baggage bin. Called back to departure point cle and was told they were missing one ramp agent. Decided to divert to ind and investigate. After landing no one found. Probable cause was air in hydraulic lines. All controls cycled repeatedly and noise ceased. I would suggest that on these type aircraft (where bags are loaded by hand) consideration should be given to placing some sort of signalling device or intercom in baggage holds to signal cockpit of a possible problem.

Original NASA ASRS Text

Title: PRECAUTIONARY LNDG MADE WHEN NOISE EMANATING FROM AFT BAGGAGE COMPARTMENT SOUNDED LIKE A PERSON THUMPING ON FLOOR. COINCIDENTALLY, DEP STATION ANNOUNCED THAT THEY WERE MISSING A RAMP AGENT.

Narrative: DURING CRUISE ADVISED BY F/A OF LOUD THUMPING COMING FROM AFT BAGGAGE BIN. CALLED BACK TO DEP POINT CLE AND WAS TOLD THEY WERE MISSING ONE RAMP AGENT. DECIDED TO DIVERT TO IND AND INVESTIGATE. AFTER LNDG NO ONE FOUND. PROBABLE CAUSE WAS AIR IN HYD LINES. ALL CONTROLS CYCLED REPEATEDLY AND NOISE CEASED. I WOULD SUGGEST THAT ON THESE TYPE ACFT (WHERE BAGS ARE LOADED BY HAND) CONSIDERATION SHOULD BE GIVEN TO PLACING SOME SORT OF SIGNALLING DEVICE OR INTERCOM IN BAGGAGE HOLDS TO SIGNAL COCKPIT OF A POSSIBLE PROB.

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.