B-767 WARN ELEX Eicas Message

[Fpetrowitsch]

Hi everybody, I'm writing again because I want to know definitively and exactly what does mean a WARN ELEX Status Eicas message on the B-oeing 767-300 airplane, grettings thanks.

[NSEU]

It essentially means that there is a problem with the power supply for the Warning Electronics Unit (WEU)

The Warning Electronics Unit provides power to:
Stall Warning
Config warning
Altitude Alert
Aural warning modules (chimes, etc).

Stall Warning faults (module and input faults) can also generate this message on later series aircraft.

Any help?

[Fpetrowitsch]

Ok thanks a lot. One more think, please. So this is a NO GO item?

[NSEU]

It really depends on what has caused the message. If it is a power supply problem, then it is no dispatch (according to our DDG).
It's up to maintenance/engineering to determine what has caused the message.

Our DDG mentions this message in a number of places. Depending on what system has caused the message, dispatch may be allowed.

[Fpetrowitsch]

Thanks a lot my friend, It's really get very clear for me, take care, grettings from Chile

[richard III]

NPH..........

[aztruck]

Quite often happens if ground power yanked out without asking and a voltage spike occurs. It is a no go but you can clear the status message by(I think) performing a stall warning test and then attempting to clear the msg.
otherwise its switch off aircraft, battery off, sit ion the dark for a couple of minutes, switch it on again and see what happens ............
Hopefully you have an engineer around to save you all this bother, or one on the end of a telephone.
It is for sure a no go if you cant clear it.

[Piper19]

or during taxi in on stand when the IRS's are put to off and airplane has not come to a complete stop yet, can also generate a warn elex. Aligning them again solves that. (can also be when aircraft is moved/towed between 2 flights)
99% of warn elex messages I had were solved by aligning IRS's

[tilos]

Pressing the EICAS test button will normally clear the message after the test has run its course.

[Smudger]

Had this the other day on my 757-200.. depowering the ac for 3 mins solved it.

[grounded27]

Yes often a "nuisance" fault on the 752.

[dafri]

Hi guys,

thats what my company's MEL states:

"Dispatch with a ›WARN ELEX‹ status message is only allowed provided the P51 WEU BITE module displays only fault code D7 (FMC invalid). This should be checked prior to each departure."

[Swedish Steve]

99% of warn elex messages I had were solved by aligning IRS's

On the original aircraft, WARN ELEX was a standing warning on the ground with IRS at OFF. Some of our old B763 still have this.
There was a mod that inhibited the message with the IRS off, but we didn't install it on all aircraft.

[haughtney1]

No need to de-power the jet if you know which breakers to pull and reset
Used to see this quite regularly on the 75 and 76, a helpful avionics chap gave me a copy of his CB diagram and shortcut fixes for our fleet...useful when in deepest darkest wherever with no support.

[Koan]

or during taxi in on stand when the IRS's are put to off and airplane has not come to a complete stop yet, can also generate a warn elex. Aligning them again solves that. (can also be when aircraft is moved/towed between 2 flights)
99% of warn elex messages I had were solved by aligning IRS's

Switching IRS off during taxi in? Not really out of the FCOM this one.