A B757-200 in cruise at FL350 declared an emergency and diverted due to the right engine loss of oil...

Attributes
ACN	556726
Time
Date	200208
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : phx
State Reference	AZ
Altitude	msl single value : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zab.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	556726
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : right eng oil and indications other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist flight crew : declared emergency flight crew : diverted to another airport
Consequence	other other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

While at cruise altitude of FL350, the crew observed the 'right engine oil pressure' light begin to flicker. The engine indications (N1, N2, egt) all appeared normal, but the #2 oil pressure was indicating low, near 80 psi, with an occasional drop into the red zone. Oil quantity was at zero. Flight control was advised, and the crew then initiated the 'engine oil pressure' checklist, and after being advised of vibrations in the cabin, the crew shut down the right engine. Flight attendants were called into the cockpit and briefed, and a PA was made to the passenger. The flight proceeded to las as an emergency aircraft, where we performed a visual straight-in to runway 25R, performing an uneventful flaps 20 degree landing. After clearing the runway, crash fire rescue equipment personnel checked the condition of the aircraft, after which we taxied to the gate uneventfully. Callback conversation with reporter revealed the following information: the reporter stated the engine was a pratt & whitney 2037 and the loss of oil pressure and quantity was caused by a failed main bearing. The reporter said on the ground maintenance found the oil sumps full so the oil was not lost externally. The reporter stated no engine vibration was felt by the flight crew but a passenger reported to a cabin attendant of feeling a vibration from the right engine.

Original NASA ASRS Text

Title: A B757-200 IN CRUISE AT FL350 DECLARED AN EMER AND DIVERTED DUE TO THE R ENG LOSS OF OIL PRESSURE AND QUANTITY. CAUSED BY A FAILED MAIN BEARING.

Narrative: WHILE AT CRUISE ALT OF FL350, THE CREW OBSERVED THE 'R ENG OIL PRESSURE' LIGHT BEGIN TO FLICKER. THE ENG INDICATIONS (N1, N2, EGT) ALL APPEARED NORMAL, BUT THE #2 OIL PRESSURE WAS INDICATING LOW, NEAR 80 PSI, WITH AN OCCASIONAL DROP INTO THE RED ZONE. OIL QUANTITY WAS AT ZERO. FLT CTL WAS ADVISED, AND THE CREW THEN INITIATED THE 'ENG OIL PRESSURE' CHKLIST, AND AFTER BEING ADVISED OF VIBRATIONS IN THE CABIN, THE CREW SHUT DOWN THE R ENG. FLT ATTENDANTS WERE CALLED INTO THE COCKPIT AND BRIEFED, AND A PA WAS MADE TO THE PAX. THE FLT PROCEEDED TO LAS AS AN EMER ACFT, WHERE WE PERFORMED A VISUAL STRAIGHT-IN TO RWY 25R, PERFORMING AN UNEVENTFUL FLAPS 20 DEG LNDG. AFTER CLRING THE RWY, CFR PERSONNEL CHKED THE CONDITION OF THE ACFT, AFTER WHICH WE TAXIED TO THE GATE UNEVENTFULLY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ENG WAS A PRATT & WHITNEY 2037 AND THE LOSS OF OIL PRESSURE AND QUANTITY WAS CAUSED BY A FAILED MAIN BEARING. THE RPTR SAID ON THE GND MAINT FOUND THE OIL SUMPS FULL SO THE OIL WAS NOT LOST EXTERNALLY. THE RPTR STATED NO ENG VIBRATION WAS FELT BY THE FLC BUT A PAX RPTED TO A CABIN ATTENDANT OF FEELING A VIBRATION FROM THE R ENG.

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.

A B757-200 in cruise at FL350 declared an emergency and diverted due to the right engine loss of oil pressure and quantity. Caused by a failed main bearing.