<< >> NASA ASRS Report 539389, February 2002

A canadair CL65 engine was shut down in-flight due to loss of oil pressure and quantity. Caused by an internal oil leak.

Attributes
ACN	539389
Time
Date	200202
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance technician : 3
ASRS Report	539389
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Resolutory Action	none taken : detected after the fact other
Consequence	other
Factors
Maintenance	contributing factor : engineering procedure performance deficiency : repair performance deficiency : fault isolation
Supplementary
Problem Areas	Chart Or Publication Aircraft Maintenance Human Performance Company
Primary Problem	Aircraft

Narrative:

On feb/wed/02 at approximately XA00, performed oil consumption runs, acceleration checks, deceleration checks. Performed oil leak checks after engine maintenance performance runs. No indications of engine problems or oil consumption or oil leaks during or after engine maintenance runs. On the second flight after release for service, engine failure occurred. Callback conversation with reporter revealed the following information: the reporter stated 2 seals were found and replaced that could have been the cause of the chronic oil consumption problem. The reporter said the required tests were performed including a high power engine run and no leaks were found. The reporter stated this engine had a long history of high oil consumption with a lot of external seals replaced. The reporter said the engine was replaced after the in-flight shutdown and the cause was believed to be a failed 7TH stage carbon seal failure.

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Original NASA ASRS Text

Title: A CANADAIR CL65 ENG WAS SHUT DOWN INFLT DUE TO LOSS OF OIL PRESSURE AND QUANTITY. CAUSED BY AN INTERNAL OIL LEAK.

Narrative: ON FEB/WED/02 AT APPROX XA00, PERFORMED OIL CONSUMPTION RUNS, ACCELERATION CHKS, DECELERATION CHKS. PERFORMED OIL LEAK CHKS AFTER ENG MAINT PERFORMANCE RUNS. NO INDICATIONS OF ENG PROBS OR OIL CONSUMPTION OR OIL LEAKS DURING OR AFTER ENG MAINT RUNS. ON THE SECOND FLT AFTER RELEASE FOR SVC, ENG FAILURE OCCURRED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED 2 SEALS WERE FOUND AND REPLACED THAT COULD HAVE BEEN THE CAUSE OF THE CHRONIC OIL CONSUMPTION PROB. THE RPTR SAID THE REQUIRED TESTS WERE PERFORMED INCLUDING A HIGH PWR ENG RUN AND NO LEAKS WERE FOUND. THE RPTR STATED THIS ENG HAD A LONG HISTORY OF HIGH OIL CONSUMPTION WITH A LOT OF EXTERNAL SEALS REPLACED. THE RPTR SAID THE ENG WAS REPLACED AFTER THE INFLT SHUTDOWN AND THE CAUSE WAS BELIEVED TO BE A FAILED 7TH STAGE CARBON SEAL FAILURE.

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.