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Spent a whole shift chasing a phantom oil leak on a Cessna 172

Turns out the seepage was from a tiny, hairline crack in the crankcase breather line fitting, not the main seal. Took me 8 hours to find it with a borescope. Anyone have a better method for tracking down those slow, weepy leaks?

2 comments

2 Comments

barbaramorgan1mo ago

Found a leak once that was just a bad bottle of dye penetrant, left a false trace everywhere.

clairebaker1mo ago

Honestly, I used to just spray and pray with cleaner, but a false trace like that would've sent me down the wrong path for hours.