Jocbay Posted March 31, 2022 Report Posted March 31, 2022 I've searched this topic, but not found an answer to my specific question. My POH and placard (shown below) both have the same instructions regarding the emergency procedure; however, neither mention the red button that resides next to the gear switch on my 78J. The red button is labeled "gear safety bypass". Where does this undocumented and most mysterious bypass fit into the emergency procedure? Is it a push, a pull; hell, it could be a rotate for all I know. Also, my "gear circuit breaker" is labeled "gear cont". I know this because I have had to use it. Long story short. Putting gear down, unsafe light goes off but no gear down indicator lights up on floor and the gear cont. circuit breaker popped - pushed in breaker and it pops again. Went through emergency procedure and handle moves 4-5" but jams. Flexed the airplane abit, reset breaker (it holds), reset latch, tried gear again (nada), no green light on floor. Raise a friend, fly over his place and get gear down conformation. Land without incident. Emergency cable still jammed. Pulled actuator assembly and off it goes to Lasar, they go through it, we replace the no back spring (which I sold to another MSr in need) and a couple three AMUs later all's well. EXCEPT I don't remember if I included the red button in my ordeal, though at some point I'm sure I did. So if y'all can clue me in on the red button... Quote
mooniac15u Posted March 31, 2022 Report Posted March 31, 2022 4 minutes ago, Jocbay said: I've searched this topic, but not found an answer to my specific question. My POH and placard (shown below) both have the same instructions regarding the emergency procedure; however, neither mention the red button that resides next to the gear switch on my 78J. The red button is labeled "gear safety bypass". Where does this undocumented and most mysterious bypass fit into the emergency procedure? Is it a push, a pull; hell, it could be a rotate for all I know. Also, my "gear circuit breaker" is labeled "gear cont". I know this because I have had to use it. Long story short. Putting gear down, unsafe light goes off but no gear down indicator lights up on floor and the gear cont. circuit breaker popped - pushed in breaker and it pops again. Went through emergency procedure and handle moves 4-5" but jams. Flexed the airplane abit, reset breaker (it holds), reset latch, tried gear again (nada), no green light on floor. Raise a friend, fly over his place and get gear down conformation. Land without incident. Emergency cable still jammed. Pulled actuator assembly and off it goes to Lasar, they go through it, we replace the no back spring (which I sold to another MSr in need) and a couple three AMUs later all's well. EXCEPT I don't remember if I included the red button in my ordeal, though at some point I'm sure I did. So if y'all can clue me in on the red button... That button isn't related to the emergency gear extension. It allows you to override the squat or airspeed switch to retract the gear. 2 Quote
Fly Boomer Posted March 31, 2022 Report Posted March 31, 2022 7 minutes ago, Jocbay said: red button that resides next to the gear switch Probably the most common use is gear swing while up on jacks during annual. 2 Quote
Jocbay Posted March 31, 2022 Author Report Posted March 31, 2022 Ahh, page 7-11 in my POH. Missed that. Thanks for the help. 1 Quote
carusoam Posted March 31, 2022 Report Posted March 31, 2022 Joc, Great question. There is plenty to learn… Friendly guidance follows… 1) The search isn’t the best… But Google works pretty good… 2) All parts of the system are really well described… 3) The M20J has a fantastic POH compared to older machines… read every page, just to know what is in there… don’t wait, hoping to find an answer later… expect answers to big questions to be covered there first… hidden in a standard format… 4) The by-pass system is incredibly well covered around here… for the times a failure occurs… you want to know why, what to do… what not to do… it’s for a failure to retract… now what…? 5) Emergency gear extension… if you haven’t done it yet… your plane is on jacks once each year… this is an awesome time to learn the system… 6) When it comes to messing up the e-gear system… it is easy to do. Use your pre-flight check list… discuss with first time backseaters… 7) If you need a POH… we have a few in the download section… contact your MSC to get the right one for your plane… 8) Nothing beats knowing how many times to pull the string to fully extend the gear… it takes forever…. 9) Transition Training usually covers how this all works… but, while on jacks is the best time for the practical aspect… 10) Some parts of a new 2U old machine are best tested while on the ground already… How does that sound? probably sounds unfriendly… My writing skills still need a little work. Best regards, -a- Quote
A64Pilot Posted March 31, 2022 Report Posted March 31, 2022 I think #5 was meant to read emergency gear extension. 1 Quote
haymak3r Posted April 1, 2022 Report Posted April 1, 2022 I just did this a couple days ago as 66H is in annual. Here is the procedure we used. This will be for emergency extension first, so with plane on the jacks, and gear up.. 1. Pulled both gear breakers. Gear ACT, and Gear Cont. 2. Put gear lever down. 3. Release emergency handle lever. Pull cable. Mine took exactly 19 full pulls. My arm was not ready for that LOL. 4. Checked that gear indicator was correct on the floor. We did inspections, all looked good. I then pushed the 2 circuit breakers in. Put gear handle up, and pushed and held the red button until the gear retracted all the way. We extended and retracted them a few different times, but you have to use the red button to retract them as others said, so that you bypass the safety switches. -Chris Quote
A64Pilot Posted April 1, 2022 Report Posted April 1, 2022 Only thing I can think to add is to slowly pull the handle up until the slack is taken up, then pull don’t jerk, feel for the stop so you don’t hit the end too hard ‘It’s not a timed procedure, no reason that I can think of to not take a short break if you need to. 1 Quote
haymak3r Posted April 1, 2022 Report Posted April 1, 2022 23 minutes ago, A64Pilot said: Only thing I can think to add is to slowly pull the handle up until the slack is taken up, then pull don’t jerk, feel for the stop so you don’t hit the end too hard ‘It’s not a timed procedure, no reason that I can think of to not take a short break if you need to. Exactly. I did pull a little more after the gear was locked, just to see what it felt like. You will definitely know that you've pulled enough. And it was an easy pull to just see what the stop feels like. Quote
201Mooniac Posted April 1, 2022 Report Posted April 1, 2022 6 hours ago, haymak3r said: I just did this a couple days ago as 66H is in annual. Here is the procedure we used. This will be for emergency extension first, so with plane on the jacks, and gear up.. 1. Pulled both gear breakers. Gear ACT, and Gear Cont. 2. Put gear lever down. 3. Release emergency handle lever. Pull cable. Mine took exactly 19 full pulls. My arm was not ready for that LOL. 4. Checked that gear indicator was correct on the floor. We did inspections, all looked good. I then pushed the 2 circuit breakers in. Put gear handle up, and pushed and held the red button until the gear retracted all the way. We extended and retracted them a few different times, but you have to use the red button to retract them as others said, so that you bypass the safety switches. -Chris Just make sure to relatch the emergency handle lever before pushing the circuit breakers back in and doing the retract. 1 Quote
Beard Posted April 1, 2022 Report Posted April 1, 2022 When I first bought my 84 M20J and was trying to retract the gear in a gear swing, my mechancI had someone blow in the pitot tube to simulate airspeed. Then we discovered the purpose of the red button. Quote
Jocbay Posted April 2, 2022 Author Report Posted April 2, 2022 Thanks again to all. My dumb question (the answer was right there in the POH) started a very useful and worthwhile discussion. Turns out, dumb questions are useful as well. jb 1 Quote
carusoam Posted April 3, 2022 Report Posted April 3, 2022 There is soooo much stuff in the POH… It takes a few reads to catch most of it…. Then a few discussions around here to realize what you may have missed or mis-understood…. Or could use better… Then, if your plane only has a 30page owners manual… you read the other plane’s POH to see how much info you are missing…. PP thoughts only… -a- Quote
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