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Display name:
The Little Arrow That Could
Note: I know there are other threads on low compressions, which I've scanned through. In the likely event I have follow-up Q's I wanted to post them here rather than necro'ing threads from 5-10y ago
Dropped aircraft off for annual yesterday.
Ran it up to normal operational temps beforehand (a few trips in the pattern) so they could do the compression test.
Compressions:
Cylinder 1: 62 (A&P comment: "it's a bit low, and there was blow by through the piston rings")
Cylinders 2 through 4: 70+ (didn't get exact #'s on 2-4, just that they were in 70s and good)
Last year c#1 was at 64, and the year before 65.
Specs:
Engine: Lycoming IO360-C1C6
Chrome cylinders
Last OH: 30y ago, Last IRAN: 2020
No metal observed during oil changes.
I'm consistently flying it >= ~20h/month, usually 2-3x per week.
Any suggestions, courses of action or additional questions I might want to provide to the shop? Or equally valuable - anything to avoid doing?
Dropped aircraft off for annual yesterday.
Ran it up to normal operational temps beforehand (a few trips in the pattern) so they could do the compression test.
Compressions:
Cylinder 1: 62 (A&P comment: "it's a bit low, and there was blow by through the piston rings")
Cylinders 2 through 4: 70+ (didn't get exact #'s on 2-4, just that they were in 70s and good)
Last year c#1 was at 64, and the year before 65.
Specs:
Engine: Lycoming IO360-C1C6
Chrome cylinders
Last OH: 30y ago, Last IRAN: 2020
No metal observed during oil changes.
I'm consistently flying it >= ~20h/month, usually 2-3x per week.
Any suggestions, courses of action or additional questions I might want to provide to the shop? Or equally valuable - anything to avoid doing?