# Sudden loss of throttle during the flight **URL:** \ **Category:** PX4 Autopilot\ **Created:** [March 7, 2021, 7:22pm UTC](https://discuss.px4.io/t/sudden-loss-of-throttle-during-the-flight/21342 "2021-03-07T19:22:19Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![quentindavid](https://discuss.px4.io/letter_avatar_proxy/v4/letter/q/5f8ce5/32.png) [@quentindavid](https://discuss.px4.io/u/quentindavid)\ **Post date:** [March 7, 2021, 7:22pm UTC](https://discuss.px4.io/t/sudden-loss-of-throttle-during-the-flight/21342/1 "2021-03-07T19:22:19Z")
Hi there ! I am here to ask some help because after a lot of tries, I still can’t understand why my ZMR 250 is behaving like this. I have a pixracer controller, with CM703 DSMX receiver. The drone is flying really well, pretty stable, everything seems right. The issue is that regularly (but not very often though), the drone suddenly drops and sometimes hits the ground (depending on the height it is flying). When I look at the logs, I can see the throttle goes at 0 during around 0.5 s. I can’t understand why ! I just bought a brand new TX16S because I had some doubt in my previous radio. Now I suspect the receiver, but before I have to replace it, I wanted to ask what do you thing of that situation ? You can see the logs here : [Flight Review](https://review.px4.io/plot_app?log=a88def37-846e-45b4-bd98-45478f283e1c) Thanks a lot for your help 🙂 ---
**Author:** ![quentindavid](https://discuss.px4.io/letter_avatar_proxy/v4/letter/q/5f8ce5/32.png) [@quentindavid](https://discuss.px4.io/u/quentindavid)\ **Post date:** [March 8, 2021, 4:44pm UTC](https://discuss.px4.io/t/sudden-loss-of-throttle-during-the-flight/21342/2 "2021-03-08T16:44:24Z")
Maybe I was not in the right category, so I just moved this topic. ---
**Author:** ![mehmetydz87](https://discuss.px4.io/user_avatar/discuss.px4.io/mehmetydz87/32/2017_2.png) [@mehmetydz87](https://discuss.px4.io/u/mehmetydz87)\ **Post date:** [March 8, 2021, 6:47pm UTC](https://discuss.px4.io/t/sudden-loss-of-throttle-during-the-flight/21342/3 "2021-03-08T18:47:59Z")
Hi It seems RC Glitch issue. > [@Problem During Mission Flight](https://discuss.px4.io/t/problem-during-mission-flight/21283/3): > > Hi @bresch I started the mission flight in Manual Switch Mode. I did not change the Flight Mode via RC Transmitter during mission. This is the second time that is happening to me [[Firmware 1.10.1 Stable Release Motor Disarm Issue in Flight](https://discuss.px4.io/t/firmware-1-10-1-stable-release-motor-disarm-issue-in-flight/14858/4)]. The first was with the Spectrum DX9 Transmitter &satellite receive. Second case is Taranis X9D Transmitter & X8R Receiver. What is the main reason for RC Glitch. What should I do and check ? Connectors and Cables [Pixhawk 4 DSM & Sbus RC Port and Cable … ---
**Author:** ![quentindavid](https://discuss.px4.io/letter_avatar_proxy/v4/letter/q/5f8ce5/32.png) [@quentindavid](https://discuss.px4.io/u/quentindavid)\ **Post date:** [March 8, 2021, 7:58pm UTC](https://discuss.px4.io/t/sudden-loss-of-throttle-during-the-flight/21342/4 "2021-03-08T19:58:12Z")
You mean the receiver itself ? Because I configured pixracer to hold in case of the RC fail, so it seems the receiver is sending valid information to the pixracer, and this information is sometimes… 0 ! I will order a new receiver and see if I have still the issue… ---
**Author:** ![mehmetydz87](https://discuss.px4.io/user_avatar/discuss.px4.io/mehmetydz87/32/2017_2.png) [@mehmetydz87](https://discuss.px4.io/u/mehmetydz87)\ **Post date:** [March 9, 2021, 7:47am UTC](https://discuss.px4.io/t/sudden-loss-of-throttle-during-the-flight/21342/5 "2021-03-09T07:47:02Z")
It seems there is no RC Fail. I mean receiver & transmitter set. Actually, I am looking for an answer to reasons for RC Glitch. I have listed again that came to my mind for checking. - Connectors and Cables [Pixhawk 4 DSM & Sbus RC Port and Cable], - Receiver Voltage [Should I use RC Receiver Voltage Protector such as [https://www.amazon.com/Spektrum-SPM1600-Voltage-Protector/dp/B000BOVMHK/ref=sr\_1\_2?dchild=1&keywords=rc+glitch+buster&qid=1614920270&sr=8-2](https://www.amazon.com/Spektrum-SPM1600-Voltage-Protector/dp/B000BOVMHK/ref=sr_1_2?dchild=1&keywords=rc+glitch+buster&qid=1614920270&sr=8-2)] - Pixhawk 4 Hardware Problem ? \*Receiver & Transmitter ? \*etc… Good luck. If I find something I will share it with you. ---
**Author:** ![quentindavid](https://discuss.px4.io/letter_avatar_proxy/v4/letter/q/5f8ce5/32.png) [@quentindavid](https://discuss.px4.io/u/quentindavid)\ **Post date:** [March 9, 2021, 9:49pm UTC](https://discuss.px4.io/t/sudden-loss-of-throttle-during-the-flight/21342/6 "2021-03-09T21:49:37Z")
Okay I see. I didn’t realized that a RC glitch within a mission could cause issues too. I will try with the new receiver and let you know. Also, I will try with a capacitor in order to avoid sudden loss of power for the RC receiver. I’ll let you know here my experiences. ---
**Author:** ![quentindavid](https://discuss.px4.io/letter_avatar_proxy/v4/letter/q/5f8ce5/32.png) [@quentindavid](https://discuss.px4.io/u/quentindavid)\ **Post date:** [March 16, 2021, 9:07pm UTC](https://discuss.px4.io/t/sudden-loss-of-throttle-during-the-flight/21342/7 "2021-03-16T21:07:25Z")
FYI I received and installed my new receiver FrSky R-XSR. I flight today and I experienced no issue whatsoever. I need to check on a longer period but I hope it solved the issue…