A embraer 145 in cruise at 16000 ft declared an emergency and diverted due to loss of oil in #2 engine. Caused by an engine driven hydraulic pump damaged drive seal.

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Attributes
ACN	572264
Time
Date	200301
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 16000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 270 flight time total : 6000 flight time type : 1500
ASRS Report	572264
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : #2 eng oil press ind other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency flight crew : diverted to another airport
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : inspection performance deficiency : installation performance deficiency : logbook entry performance deficiency : testing
Supplementary
Problem Areas	Maintenance Human Performance Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

Approximately 50 NM out of ZZZ. En route from ZZZ1, us, EICAS warning message oil low pressure. Followed QRH and shut #2 engine down. 4 people on board. Pilot, copilot, flight attendant, mechanic. Had mechanic situation in jumpseat for possible advisories. Declared emergency, landed uneventfully at kpit, with no further incidence. After running checklist -- trouble-shoot with available system pages on multifunction display. Noticed oil quantity dropping from 5 quarts to 3 quarts. Callback conversation with reporter revealed the following information: the reporter stated the #2 engine driven hydraulic pump was replaced prior to departure of the positioning ferry. The reporter said following the quick reference handbook, the engine was shut down in flight. The reporter stated the loss of engine oil was caused by a damaged hydraulic pump drive seal, possibly during installation.

Original NASA ASRS Text

Title: A EMBRAER 145 IN CRUISE AT 16000 FT DECLARED AN EMER AND DIVERTED DUE TO LOSS OF OIL IN #2 ENG. CAUSED BY AN ENG DRIVEN HYD PUMP DAMAGED DRIVE SEAL.

Narrative: APPROX 50 NM OUT OF ZZZ. ENRTE FROM ZZZ1, US, EICAS WARNING MESSAGE OIL LOW PRESSURE. FOLLOWED QRH AND SHUT #2 ENG DOWN. 4 PEOPLE ON BOARD. PLT, COPLT, FLT ATTENDANT, MECH. HAD MECH SIT IN JUMPSEAT FOR POSSIBLE ADVISORIES. DECLARED EMER, LANDED UNEVENTFULLY AT KPIT, WITH NO FURTHER INCIDENCE. AFTER RUNNING CHKLIST -- TROUBLE-SHOOT WITH AVAILABLE SYS PAGES ON MULTIFUNCTION DISPLAY. NOTICED OIL QUANTITY DROPPING FROM 5 QUARTS TO 3 QUARTS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE #2 ENG DRIVEN HYD PUMP WAS REPLACED PRIOR TO DEP OF THE POSITIONING FERRY. THE RPTR SAID FOLLOWING THE QUICK REF HANDBOOK, THE ENG WAS SHUT DOWN IN FLT. THE RPTR STATED THE LOSS OF ENG OIL WAS CAUSED BY A DAMAGED HYD PUMP DRIVE SEAL, POSSIBLY DURING INSTALLATION.

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.