Lean of Peak

[patrolpilot]

My NA G has the GAMIs, but I've ended up running ROP as my engines don't seem to like the LOP, particularly my rear engine. They develop a high-frequency vibration at about 15° LOP that progressively worsens.

I've done the Advanced Pilot Seminars training and the Busch book, but it comes down to some airplanes that don't care for LOP ops (addressed in both the training and the book.)

I've tried to get LOP many times, but the last time was on a flight from FL back to TX. I was over the FL panhandle at 10K, LOP, and could feel that light HF vibration; I thought I would give it a bit. My attitude indicator was blurry when I scanned the panel, so I checked the O2 flow to my cannula. It was appropriate. So, I moved the mixtures back through peak to ROP, and the high-frequency vibration of the AI settled, reflecting and confirming what my body was feeling.

So now, I fly on the ROP side of the GAMI placard settings.