# "You have a lot of splaining to do"

Page: https://stenobird.com/podcast/ask-the-a-ps-1305830/you-have-a-lot-of-splaining-to-do
Text version: https://stenobird.com/podcast/ask-the-a-ps-1305830/you-have-a-lot-of-splaining-to-do.md
Podcast: [Ask the A&Ps](https://stenobird.com/podcast/ask-the-a-ps-1305830)
Published: 2025-09-17T15:38:00+00:00
Episode link: https://traffic.megaphone.fm/AOPA9934885412.mp3?updated=1770048819
Audio file: https://traffic.megaphone.fm/AOPA9934885412.mp3?updated=1770048819
Processing state: not_requested
JSON: https://stenobird.com/v1/public/podcasts/ask-the-a-ps-1305830/episodes/you-have-a-lot-of-splaining-to-do
Duration seconds: 3202

## Resource

Gotchas and head-scratchers are the theme this episode, as Mike, Paul, and Colleen help an owner with a pitted camshaft, an inop instrument, a faulty vacuum line, and ops procedures. Email podcasts@aopa.org for a chance to get on the show. Join the world's largest aviation community at aopa.org/join Full episode notes below: Mike had two airplanes over the past 10 years with crankshaft pitting, despite regularly flying, hangaring, and using an engine dehydrator. He's wondering if there's anything else he can do to keep the rust away. The hosts focus on the timing of the events and consider that maybe Mike was caught up in a period when Continental had manufactured some sub-standard parts. They are confident Mike did the right thing by having his mechanic use the guidance in Continental's Service Information Directive 05-1B, which describes how to inspect and then when to replace the cam if spalding is found. Trevor has a Cessna 152 and he noticed that the vacuum line near the static sump had been bumped and was disconnected. It's a simple assembly that doesn't require tools to replace, only some teflon thread. He's wondering if that would be acceptable to do under the regulations for preventative maintenance. The hosts agree that it fits the definition of preventative maintenance perfectly, but that changing out the line would trigger the requirement for a static system leak-down test, which doesn't meet the definition. So, although a pilot could probably replace the line, he/she would have to hire a mechanic to do the leak-down test anyway. Brian is the manager of a flying club with a Cherokee that has a persistent inop flag on the S-Tec 30 turn coordinator, and he wants to know if you can label only the inop flag as inop. Mike thinks that's sound logic, but Paul and…

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## Transcript

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