B757 flight crew has a rev EICAS message; declares emergency and diverts.

Attributes
ACN	721359
Time
Date	200612
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	721359
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : eicas warning other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency flight crew : landed as precaution
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

En route from ZZZ1 to ZZZ2 we received a 'rev EICAS' message. We had no yaw or buffeting or loss of airspeed. After accomplished the QRH procedure; the captain elected to divert to ZZZ rather than continue to ZZZ2. We declared an emergency due to a planned overweight landing. The landing at ZZZ was uneventful; and crash fire rescue equipment responded even though the captain had said that assistance was not needed. After arrival at ZZZ; the captain mentioned to me that when he briefed the flight attendants on the situation; he inadvertently neglected to let them know that we had declared an emergency due to the overweight landing.

Original NASA ASRS Text

Title: B757 FLT CREW HAS A REV EICAS MESSAGE; DECLARES EMER AND DIVERTS.

Narrative: ENRTE FROM ZZZ1 TO ZZZ2 WE RECEIVED A 'REV EICAS' MESSAGE. WE HAD NO YAW OR BUFFETING OR LOSS OF AIRSPD. AFTER ACCOMPLISHED THE QRH PROC; THE CAPT ELECTED TO DIVERT TO ZZZ RATHER THAN CONTINUE TO ZZZ2. WE DECLARED AN EMER DUE TO A PLANNED OVERWT LNDG. THE LNDG AT ZZZ WAS UNEVENTFUL; AND CFR RESPONDED EVEN THOUGH THE CAPT HAD SAID THAT ASSISTANCE WAS NOT NEEDED. AFTER ARR AT ZZZ; THE CAPT MENTIONED TO ME THAT WHEN HE BRIEFED THE FLT ATTENDANTS ON THE SITUATION; HE INADVERTENTLY NEGLECTED TO LET THEM KNOW THAT WE HAD DECLARED AN EMER DUE TO THE OVERWT LNDG.

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.