![UH-1 Main Rotor System Question](https://static.wixstatic.com/media/9f78cd_3af992788dc347e4843d1beac2823849~mv2.png/v1/fill/w_316,h_237,fp_0.50_0.50,q_95,enc_auto/9f78cd_3af992788dc347e4843d1beac2823849~mv2.webp)
UH-1 Main Rotor System Question
Alright for those with eagle eyes, what is wrong with this Main Rotor System?
![Oil Cooler Turbine](https://static.wixstatic.com/media/9f78cd_cfff3bdd39e6462781a49d1e520e86f6~mv2.png/v1/fill/w_316,h_237,fp_0.50_0.50,q_95,enc_auto/9f78cd_cfff3bdd39e6462781a49d1e520e86f6~mv2.webp)
Oil Cooler Turbine
In an effort to keep fluid temps down, you might want to try this tip. With Huey II's having a larger oil cooler turbine, and to prevent...
![](https://static.wixstatic.com/media/9f78cd_4a060bdcb26f4bb1bc962c8efc0c435c~mv2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/9f78cd_4a060bdcb26f4bb1bc962c8efc0c435c~mv2.webp)
![Fitting Cap on Mast Bearing](https://static.wixstatic.com/media/9f78cd_4a060bdcb26f4bb1bc962c8efc0c435c~mv2.jpg/v1/fill/w_316,h_237,fp_0.50_0.50,q_90,enc_auto/9f78cd_4a060bdcb26f4bb1bc962c8efc0c435c~mv2.webp)
Fitting Cap on Mast Bearing
The photo above shows a simple fitting cap. If you look close you will notice the end of the cap is domed and there is a hole in it. This...
![](https://static.wixstatic.com/media/9f78cd_90600ef20ae14880b68d6f4faf0668d4~mv2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/9f78cd_90600ef20ae14880b68d6f4faf0668d4~mv2.webp)
![Control Tubes](https://static.wixstatic.com/media/9f78cd_90600ef20ae14880b68d6f4faf0668d4~mv2.jpg/v1/fill/w_316,h_237,fp_0.50_0.50,q_90,enc_auto/9f78cd_90600ef20ae14880b68d6f4faf0668d4~mv2.webp)
Control Tubes
Just a quick observation on possibly an overlooked item, on something that might fall under complacency. During your heavy maintenance...
![](https://static.wixstatic.com/media/9f78cd_dfc457c90b4048e088506c1cf36c3552~mv2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/9f78cd_dfc457c90b4048e088506c1cf36c3552~mv2.webp)
![Roof Mounted Hydraulic Reservoir](https://static.wixstatic.com/media/9f78cd_dfc457c90b4048e088506c1cf36c3552~mv2.jpg/v1/fill/w_316,h_237,fp_0.50_0.50,q_90,enc_auto/9f78cd_dfc457c90b4048e088506c1cf36c3552~mv2.webp)
Roof Mounted Hydraulic Reservoir
Just a few thoughts on the exterior protection of the roof-mounted hydraulic reservoir. Even though when a reservoir is sometimes painted...
![](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...