A CRJ200 #1 engine low oil pressure warning alerted for the third time in 4 days. The crew declared an emergency and landed.

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Attributes
ACN	710888
Time
Date	200609
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 30000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 230 flight time total : 8000 flight time type : 3000
ASRS Report	710888
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance
Independent Detector	aircraft equipment other aircraft equipment : eicas
Resolutory Action	flight crew : landed in emergency condition flight crew : diverted to another airport flight crew : declared emergency
Consequence	other other
Factors
Maintenance	performance deficiency : fault isolation performance deficiency : testing
Supplementary
Problem Areas	Company Maintenance Human Performance Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

In cruise flight; got the #1 engine low oil pressure warning. Alerted for the third time in the past 4 days. We performed the QRH procedures and landed in ZZZ without further event on #1 engine; as did the 2 crews before us! Callback conversation with reporter revealed the following information: reporter stated that his air carrier's feedback to him indicated that the 11TH stage bleed pressure to the oil tank was restr and; therefore; not keeping a pressure head on the oil tank. Because of low pressure head; the oil pressure indicated below normal. The air carrier consulted with the engine manufacturer to finally resolve the problem. The reporter praised his air carrier for finally fixing this aircraft's problem but he sees a pattern similar to this with recurring flts and the same failures repeating after maintenance has signed the logbook off. The reporter feels that his air carrier allows pilots to test fly aircraft with revenue passenger on board. He is very experienced with this aircraft and has no problem with malfunctions but he is concerned about low time new hire pilots and new capts getting into situations they would have difficulty handling.

Original NASA ASRS Text

Title: A CRJ200 #1 ENG LOW OIL PRESSURE WARNING ALERTED FOR THE THIRD TIME IN 4 DAYS. THE CREW DECLARED AN EMER AND LANDED.

Narrative: IN CRUISE FLT; GOT THE #1 ENG LOW OIL PRESSURE WARNING. ALERTED FOR THE THIRD TIME IN THE PAST 4 DAYS. WE PERFORMED THE QRH PROCS AND LANDED IN ZZZ WITHOUT FURTHER EVENT ON #1 ENG; AS DID THE 2 CREWS BEFORE US! CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT HIS ACR'S FEEDBACK TO HIM INDICATED THAT THE 11TH STAGE BLEED PRESSURE TO THE OIL TANK WAS RESTR AND; THEREFORE; NOT KEEPING A PRESSURE HEAD ON THE OIL TANK. BECAUSE OF LOW PRESSURE HEAD; THE OIL PRESSURE INDICATED BELOW NORMAL. THE ACR CONSULTED WITH THE ENG MANUFACTURER TO FINALLY RESOLVE THE PROB. THE RPTR PRAISED HIS ACR FOR FINALLY FIXING THIS ACFT'S PROB BUT HE SEES A PATTERN SIMILAR TO THIS WITH RECURRING FLTS AND THE SAME FAILURES REPEATING AFTER MAINT HAS SIGNED THE LOGBOOK OFF. THE RPTR FEELS THAT HIS ACR ALLOWS PLTS TO TEST FLY ACFT WITH REVENUE PAX ON BOARD. HE IS VERY EXPERIENCED WITH THIS ACFT AND HAS NO PROB WITH MALFUNCTIONS BUT HE IS CONCERNED ABOUT LOW TIME NEW HIRE PLTS AND NEW CAPTS GETTING INTO SITUATIONS THEY WOULD HAVE DIFFICULTY HANDLING.

Data retrieved from NASA's ASRS site as of January 2009 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.