Aircraft equipment problem internal engine failure.

Attributes
ACN	298286
Time
Date	199503
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : psp
State Reference	CA
Altitude	msl bound lower : 24000 msl bound upper : 24000
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Controlling Facilities	artcc : zla
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 : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 7200 flight time type : 500
ASRS Report	298286
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 5500 flight time type : 850
ASRS Report	298291
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency none taken : anomaly accepted other
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

On a cargo flight from lax to huf climbing to FL240 we experienced an airframe vibration. We leveled off at FL240 and tried to isolate the problem by retarding the throttles one at a time. Suspected #1 engine as the cause. Bring the #1 throttle back momentarily did not solve the problem. After the series of vibrations with all engine indications normal, we heard a loud bang. At this time we declared an emergency and asked ATC for vectors to the nearest suitable airport. We landed without incident and taxied to the ramp. Maintenance was called and an inspection of the #1 engine was performed. Found metal savings all around the #1 engine oil filter/screen. Suspected (maintenance) gear box failure or bearing failure. All crewmembers performed their duties according to company policies and procedures in a safe and professional manner.

Original NASA ASRS Text

Title: ACFT EQUIP PROB INTERNAL ENG FAILURE.

Narrative: ON A CARGO FLT FROM LAX TO HUF CLBING TO FL240 WE EXPERIENCED AN AIRFRAME VIBRATION. WE LEVELED OFF AT FL240 AND TRIED TO ISOLATE THE PROB BY RETARDING THE THROTTLES ONE AT A TIME. SUSPECTED #1 ENG AS THE CAUSE. BRING THE #1 THROTTLE BACK MOMENTARILY DID NOT SOLVE THE PROB. AFTER THE SERIES OF VIBRATIONS WITH ALL ENG INDICATIONS NORMAL, WE HEARD A LOUD BANG. AT THIS TIME WE DECLARED AN EMER AND ASKED ATC FOR VECTORS TO THE NEAREST SUITABLE ARPT. WE LANDED WITHOUT INCIDENT AND TAXIED TO THE RAMP. MAINT WAS CALLED AND AN INSPECTION OF THE #1 ENG WAS PERFORMED. FOUND METAL SAVINGS ALL AROUND THE #1 ENG OIL FILTER/SCREEN. SUSPECTED (MAINT) GEAR BOX FAILURE OR BEARING FAILURE. ALL CREWMEMBERS PERFORMED THEIR DUTIES ACCORDING TO COMPANY POLICIES AND PROCS IN A SAFE AND PROFESSIONAL MANNER.

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.