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Thread: 3400s shutdown fault

  1. #1
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    3400s shutdown fault

    My 3400s EF, which along with the EE has performed flawlessly for almost 5 years, suddenly refused to shut down. Instead, it displayed a set of 5-6 character (text) lines including:

    "INFO: RCU not detected CPU 0 stall (t=xxxxxxx jiffies)" -- where the 7 "x's" slowly rolled over, through various number values.

    The only possible precipitating event I can think of was a relatively firm landIng (stuff happens) though after that it continued to perform fine through a long taxi until the attempted shutdown on the ramp, when it would not turn itself OFF. In efforts to try to get it to shut down, I switched both primary and backup power sources ON and OFF, with and without the EE, etc., attempted manual shutdown holding button 2, then 3, per the manual, p. 11 -- all without success. The unit remained stuck ON through another panel power up and twenty minute flight home. After panel shutdown there, it remained ON, obviously running on the internal backup battery alone, which held it up for 83 min. (Yay!) before reaching full discharge when the unit did, finally, shut down.

    After being down for several minutes, I fired up the panel again, and got error messages as shown in the attached photo. The second to last line in the screen shot is cut off but reads "...unknown-block (0,0)".

    Name:  P1020232.jpg
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    It continued to automatically loop through multiple reboot attempts, without success. It has the latest Vs8.08.29-MV16 system software, which I have not yet attempted to reload.

    Is this likely due to failure of an onboard system clock button battery, or something else? Can I fix it or do further troubleshooting without sending it in for further analysis & repair? TIA.
    Last edited by rshannon; 03-10-2015 at 02:37 PM.
    Ron
    Murphy Rebel / Jabiru 3300A
    Dual AF-3400s (EF/EE+AOA)
    http://n254mr.com

  2. #2
    Advanced Flight Systems Shawn McGinnis's Avatar
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    I would recommend disconnecting the internal backup battery and pressing button one several times without master power. This will drain all extra power out of the EFIS. Then apply master power and see if the screen will boot properly.

    If this fails install a SD card with the latest software to see if it can self repair.

    After that the screen would need to come back via RMA.
    Shawn McGinnis

    Advanced Flight Systems
    support@advanced-flight-systems.com

  3. #3
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    Because getting it out of this panel is quite a chore, I may as well try reloading the software first, just in case it might recover by doing that alone. If it doesn't, I'll pull it out and do the complete drain and reload sequence you suggest on the bench. Thanks.
    Ron
    Murphy Rebel / Jabiru 3300A
    Dual AF-3400s (EF/EE+AOA)
    http://n254mr.com

  4. #4
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    Finally got this pulled out and on the bench. After disconnecting the backup battery, and draining per your suggestion, I'm not able to reload the software. Expect incoming.
    Ron
    Murphy Rebel / Jabiru 3300A
    Dual AF-3400s (EF/EE+AOA)
    http://n254mr.com

  5. #5
    Advanced Flight Systems Shawn McGinnis's Avatar
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    I sent over the RMA information. We will let you know what we find.
    Shawn McGinnis

    Advanced Flight Systems
    support@advanced-flight-systems.com

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