toto Posted September 4, 2020 Report Posted September 4, 2020 I had never heard of this obnoxious little spring until I read the 2013 thread here on MS, which has great input from Don Kaye and others. There's a new article in this month's Mooney Flyer about the actuator spring, worth a quick read to refresh painful memories. My least favorite technical topics are single points of failure with safety implications. Yay. SBM20-282-A.pdf
Bob - S50 Posted September 4, 2020 Report Posted September 4, 2020 2 hours ago, toto said: I had never heard of this obnoxious little spring until I read the 2013 thread here on MS, which has great input from Don Kaye and others. There's a new article in this month's Mooney Flyer about the actuator spring, worth a quick read to refresh painful memories. My least favorite technical topics are single points of failure with safety implications. Yay. SBM20-282-A.pdf 230.61 kB · 4 downloads We just had ours changed a couple weeks ago. We had put a bit over 1000 hours on the plane since we changed it last time about 6 years ago. Hard buggers to find. Our MSC ordered them and it took a couple months to get them. Total cost, installed for us was about $1300.
carusoam Posted September 12, 2020 Report Posted September 12, 2020 The best info came with pics from Andrew... aka @Hyett6420 the failure mode came from surface crack propagation... surface cracks appeared with age and use... Avoiding them was probably improved process control for the materials... while building the spring. There were certain years of springs to be avoided... Spring technology isn’t that challenging. Best regards, -a-
toto Posted September 12, 2020 Author Report Posted September 12, 2020 It's an unfortunate design decision, in any case - a little spring that can take out both primary and secondary gear extension functions.
toto Posted September 15, 2020 Author Report Posted September 15, 2020 I'm going to try to link directly to your post with the photos... Wish me luck. 1
steingar Posted September 15, 2020 Report Posted September 15, 2020 Once again, Johnson bar for the win! 5
Hank Posted September 15, 2020 Report Posted September 15, 2020 3 hours ago, steingar said: Once again, Johnson bar for the win! Until the handle comes apart when trying to lower the gear . . . . Right, Ned? Rob 1
rbridges Posted September 15, 2020 Report Posted September 15, 2020 1 hour ago, Hank said: Until the handle comes apart when trying to lower the gear . . . . Right, Ned? Rob The handle coming loose was a non-event fortunately. I was ready to use my feet for a Fred Flinstone landing.
Hank Posted September 15, 2020 Report Posted September 15, 2020 2 hours ago, rbridges said: The handle coming loose was a non-event fortunately. I was ready to use my feet for a Fred Flinstone landing. I understand that! A gear up would likely end my flying career . . . .
jetdriven Posted February 25, 2021 Report Posted February 25, 2021 Isn’t the no back spring where only the replacement ones had failed? I mean a clock spring by design gets flexed twice a second for 60 years and doesn’t fail, I just don’t get it I guess
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