bdash

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About bdash

  • Rank
    Advanced Member

Profile Information

  • Gender
    Male
  • Location
    Lakeport, CA
  • Reg #
    N335BB
  • Model
    M20J

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  1. I spoke with LASAR and the immediate reaction after I described the symptoms was also that it sounded like an intake leak. Since my aircraft is conveniently based at Lampson Field, they're taking a look at it now.
  2. Yep, I'm aware of the need to do the two step update from old versions of the firmware (pre-v3.44 upgrade, then the normal upgrade). For whatever reason the update to the intermediate version never completes. JPI support said that they don't have any suggestions besides sending it in.
  3. The manual for the EDM 830 has instructions for downloading the data to a USB drive. I've confirmed that everything is correct with the USB drive (the EDM 830 can see a firmware update if I copy one onto the same drive, but for whatever reason the updater doesn't permit updating from the firmware version I presently have). The EDM 830 manual does not mention any other mechanism for retrieving data, nor do the system diagrams suggest there is any other means to do so. As I mentioned in my original post, the firmware version that the EDM 830 has installed is an older version that is reported to have issues with data logging, including the "DATALOG ERR" that I often see. I'm doubtful that it's even logging any data. I understand the value of an engine monitor for troubleshooting. It's also invaluable for managing the engine while flying the aircraft. Given that I fly frequently and have little downtime between flights, I've not yet found a good time to remove the engine monitor and ship it to the manufacturer to be updated or repaired. I'd rather not be flying for weeks with nothing but an analog CHT and EGT gauge on a single cylinder to go by. I was expecting that I'd be able to wait until another maintenance event such as my annual inspection when the airplane will otherwise be unusable to deal with that.
  4. I'm not sure what you mean by this. The EDM 830 sporadically displays "DATALOG ERR" during flight, and has never written anything to any USB drive I've inserted. I'm not convinced it's even logging the data it's generating. If you're aware of some way other than a USB drive to retrieve data from an EDM 830, I can definitely give it a go.
  5. When I noticed the large EGT difference, I had leaned the mixture aggressively for taxiing. I then went full rich for the mag check. I'm not 100% sure if I leaned the mixture again after that, while watching it idle at 1000rpm.
  6. This evening after flying from KPAO home to 1O2 I taxied over to my hangar and was taking care of some post-flight tasks while letting the airplane sit idling at around 800rpm. I happened to glance at the engine monitor and noticed that the EGT reading for cylinder 4 was significantly lower than the other three cylinders (1080, 1080, 985 and 750 degrees respectively). I hadn't noticed any abnormal differences in the EGT during flight, and I don't recall ever having seen such a large difference while idling on the ground. I ran the engine up to 2,200rpm to do a mag check. The EGTs were all within around 50 degrees between cylinders at that power setting, and the mag check showed the same consistent drop between left and right that I've always seen, and a consistent rise in EGTs across cylinders. This suggests to me that the ignition side of things is working fine. After the mag check, I let it idle at around 1000rpm. I could hear a brief stutter / change in the engine sound, every 5-10 seconds, that appeared to correspond to a 10-20º drop in EGT before they climbed up to their previous values. I've not looked closely at the EGT at idle before so I'm not sure if the fluctuation is normal, but I've definitely not heard the stutter before. Sadly the engine monitor, a JPI EDM 830, appears to be on a firmware version that is unable to download data to a USB drive. JPI has said that updating the firmware requires removing the unit and sending it in to them, so I've been putting it off. Unfortunately that means the only data I have is a couple of shaky videos of the engine monitor captured on my iPhone and my average memory. I'll be giving LASAR a call in the morning to see if they can take a look at it. Until then I'd be curious to hear any theories as to what could be the culprit.
  7. bdash

    Aspen ADS-B Software Update

    One of the recent software updates for GTN units caused them to occasionally flicker to a black screen then back to the menu. The service bulletin for the software release containing the fix mentions it was related to handling of weather data received via ADS-B.
  8. bdash

    2018 Hours

    I'm at just over 200 hours for the year. Around 115 of those were in my old Cessna 172F, with the remaining 85 hours in my M20J that I upgraded to towards the end of August.
  9. Yes, it appears to be visible even when not logged in.
  10. The "About Me" tab appears to only show up on a user's profile if they've filled it in. I can see yours just fine. You should be able to see mine too (admittedly not very interesting).
  11. bdash

    Curious TFR at 0O4

    You could always call the NorCal TRACON phone number listed on the TFR and ask about it.
  12. bdash

    Curious TFR at 0O4

    They've had similarly-shaped TFRs between 0O4 and the northwest corner of the Camp Fire TFR during the last week, and I see upcoming TFRs for the next three days. The title of the TFRs mentions ARNG, which suggests the Army National Guard may be operating aircraft in support of the firefighting efforts out of Corning. The timing and altitude of the TFRs is a bit weird though, 8pm to 5am from 10,000 to 13,000ft. Perhaps they're assisting with IR mapping of the fire area?
  13. bdash

    Altimeter vs manifold pressure gauge

    You don't mention what model JPI engine monitor you have, but the manual for the EDM 830 says in Section 8 Programming Manifold Pressure (MAP) to set the MAP to the airport's current altimeter setting when you're doing the adjustment at a sea level airport. If you're not at sea level, they provide a table in which you look up the value to use based on airport altimeter setting and field elevation.
  14. bdash

    Today's flight for 2018

    It took over an hour to upload that three minute video clip on my awful home internet connection, so I figured I'd limit it to the bits that leave a good impression
  15. bdash

    Today's flight for 2018

    My GoPro Hero 7 arrived this week, so I took it for a test run on my flight back to Lakeport this evening. I was very impressed with the built-in stabilization. Here's a clip of my transition through Oakland's class C airspace.