![](https://static.wixstatic.com/media/9f78cd_4a9edcbb1d6144a39d39471f790f3063~mv2_d_1787_3000_s_2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/9f78cd_4a9edcbb1d6144a39d39471f790f3063~mv2_d_1787_3000_s_2.webp)
![Radio Active Materials in T53 Engine](https://static.wixstatic.com/media/9f78cd_4a9edcbb1d6144a39d39471f790f3063~mv2_d_1787_3000_s_2.jpg/v1/fill/w_316,h_237,fp_0.50_0.50,q_90,enc_auto/9f78cd_4a9edcbb1d6144a39d39471f790f3063~mv2_d_1787_3000_s_2.webp)
Radio Active Materials in T53 Engine
I have known about this for years but thought this is information many may not know about the radio active materials in the T53 Engine. ...
![](https://static.wixstatic.com/media/9f78cd_9fbf774b7451446f89d565d91fc423e9.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/9f78cd_9fbf774b7451446f89d565d91fc423e9.webp)
![Droop Cam Shear Pin](https://static.wixstatic.com/media/9f78cd_9fbf774b7451446f89d565d91fc423e9.jpg/v1/fill/w_316,h_237,fp_0.50_0.50,q_90,enc_auto/9f78cd_9fbf774b7451446f89d565d91fc423e9.webp)
Droop Cam Shear Pin
The droop cam shear pin was put into the collective, droop cam, N2 governor linkage to separate the collective from the rest of the...
![](https://static.wixstatic.com/media/9f78cd_e9348e58477b4dbd8e4b55e8478f8a70~mv2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/9f78cd_e9348e58477b4dbd8e4b55e8478f8a70~mv2.webp)
![High Frequency Vibe in Pedals](https://static.wixstatic.com/media/9f78cd_e9348e58477b4dbd8e4b55e8478f8a70~mv2.jpg/v1/fill/w_316,h_237,fp_0.50_0.50,q_90,enc_auto/9f78cd_e9348e58477b4dbd8e4b55e8478f8a70~mv2.webp)
High Frequency Vibe in Pedals
Several years ago on another contract, we had a 212 that had come in after a day of flying with a logbook entry of “HIGH FREQ VIBRATION...
![](https://static.wixstatic.com/media/9f78cd_d2da17df25e34dd48c821012eef45363.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/9f78cd_d2da17df25e34dd48c821012eef45363.webp)
![Swashplate Trunnion Bolts](https://static.wixstatic.com/media/9f78cd_d2da17df25e34dd48c821012eef45363.jpg/v1/fill/w_316,h_237,fp_0.50_0.50,q_90,enc_auto/9f78cd_d2da17df25e34dd48c821012eef45363.webp)
Swashplate Trunnion Bolts
When installing trunnion’s in any of the five positions on the swashplate be sure to install the inner retaining bolt first. The one on...
![](https://static.wixstatic.com/media/9f78cd_a9dddc5ea6df444f8607193d58a65c72~mv2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/9f78cd_a9dddc5ea6df444f8607193d58a65c72~mv2.webp)
![Inspection for Cracks on Airframe](https://static.wixstatic.com/media/9f78cd_a9dddc5ea6df444f8607193d58a65c72~mv2.jpg/v1/fill/w_316,h_237,fp_0.50_0.50,q_90,enc_auto/9f78cd_a9dddc5ea6df444f8607193d58a65c72~mv2.webp)
Inspection for Cracks on Airframe
Just to add to the excellent article by Mr. Frinchaboy, dated 17 April, I just wanted to give a short explanation as to the “WHY” cracks...