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  1. Username Protected
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       #1  

    AHRS Fault

    I have a question to which you can perhaps answer. I had a AHRS 1 fault not failed but fault. Once on the ground the re initialisation did solved the problem. I had still white CAS message AHRS FAULT.
    Checking the MEL, dispatch is allowed
    VFR flight
    Both PDF on AHRS2
    and the say no autopilots available
    Can we do a flight in IFR in VMC condition. The autopilot was available. Why the MEL say VFR, when I red it I interpreted VFR by VMC
    If not why we can fly VFR and not IFR VMC. I don’t really see the problem to fly IFR, out of RVSM.
    If you can provide my your opinion would be great.
    Did EMBRAER made an error writing VFR instead of VMC? Because if you have AHRS Failed, in flight there is nothing telling that we need to avoid IMC and leave RVSM. So I don’t see how we cannot fly IFR only on VMC condition to be secure if we lose the second AHRS
    Thanks by advance
  2. Username Protected
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    #2  
    (Username Protected),

    My MEL (which is based on MMEL rev 3 11/09/2020) says VMC.

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       #3  
    [BOX]Name:  043854DD-DA42-4C8A-920D-EFEC8861C004.jpeg
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    But your MEEL is phenom 300. For the 100 it says VFR
    It is strange
    (Username Protected)
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    #4  
    You may have an older MEL. Current is rev 4 and mine says VMC.

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    #5  
    Fabian it may be an EASA translation issue. Here is the FAA original document (rev 3) for EMB-500, matches (Username Protected)'s MEL guide.

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  6. Username Protected
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       #6  
    Thanks everybody for your help
    after more investigation, I Checked EASA MEL of all phenom (normal, E and EV) all the EASA MEL say VFR. Only FAA MEL say VMC
    I can’t understand why but this is the answer for the moment
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    #7  
    I also had an AHRS 2 failure due to a problem between magnetometer 2 and AHRS 2. Because of that, the autopilot disconnected and I had to hand-fly the airplane from Florida to Turks & Caicos single pilot. Only on the ground I learned from another pilot who had the same issue, that I could have put the sensor of the PFD2 to AHRS1, and with that setting the autopilot would have worked! Good to know for the next time this happens.
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       #8  
    Quote Originally Posted by (Username Protected) View Post
    I also had an AHRS 2 failure due to a problem between magnetometer 2 and AHRS 2. Because of that, the autopilot disconnected and I had to hand-fly the airplane from Florida to Turks & Caicos single pilot. Only on the ground I learned from another pilot who had the same issue, that I could have put the sensor of the PFD2 to AHRS1, and with that setting the autopilot would have worked! Good to know for the next time this happens.
    This is what I did so form me no problem of AP

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