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Likely the government will ignore all reason and continue whatever way they were going to anyway. Worth a shot, though. My day job is statistics and data analysis and I have sufficient connections to consult on the engineering side. The biggest issue is that the entire report considers only the...

What kind of CHT probe is it, out of curiosity? FWIW I am sticking with my guess that it's indication error. I look forward to seeing this in next month's puzzler!

I am very suspicious of the data analysis surrounding this AD. The study methodology in the SAIB is tailor-made to cause a panic. I am currently awaiting processing of a raw data FOIA request to do a proper analysis of this.

From Piper Arrow III POH. Indeed, the commentary implies Va is the limit in rough air. I guess Vno is the limit for non-smooth air? Up to pilot discretion the difference between not-smooth and rough. :dunno:

Ok so basically no such scenario. Re: ADs: It is the airplane owner's (or operator's if you want to be pedantic) responsibility to track ADs between annuals, not yours. You mention risk of incomplete scanned logs (which is out of scope in my request). Regardless, I don't see how you would...

When buying my Arrow I initially looked at a plane with 3 year old engine and paint. The paint was already fairing from the Florida sun and I was very worried about the engine being rusted out from 3 years of neglect. I went with a plane that had original (from 2002) paint with just some chips...

Can I self-insure my takeoff performance by following the checklist??

There's nothing in the FARs that says the sky is blue or water is wet, either. Salty is making an (obvious) argument of defintion, not what you are legally obligated to do. Just because you aren't required to insure doesn't mean you can call anything you want "insurance". Words have meaning.

Here's your explicit opportunity: please describe a scenario where you needed physical logbooks (instead of complete copies) to perform maintenance for a part 91 aircraft owner. Examples of scenarios that do not meet this: Asked for physical copies because owner took bad scans Asked for...

Definitely curious to hear what they say. I'm no A&P, but I do routinely read the Savvy engine monitor puzzlers. :dunno: The two rapid cooling events are the strange part for me. Sure, preignition could cause faster temp spikes than detonation, but the cooling rate should be similar and that...

As I said, Savvy does this for all (thousands?) of their clients. I didn't make this up. Every mechanic I have ever worked with has given a signed self-adhesive sticker by default (I have never had to ask). Sticker goes in the logbook, new scans go online. Anyone not doing this is clearly...

This would probably be a perfect time to pay up for SavvyAnalysis (if you haven't already) to get feedback from someone that looks at these all day. That being said, the CHT dropoff you're seeing looks pretty non-physical to my eyes. 200F drop in the span of 10s? Here's a column with an example...

Are you referring to "accepted industry practices"? The regs don't prevent you from demanding all sorts of draconian junk from owners; doesn't mean an owner will has to put up with demands that have no regulatory basis. If a shop insisted on physical copies I'd see that as a bad sign that they...

Please reference the regulation that requires you reference original logbooks to make an airworthiness determination. AFAIK the FAA doesn't even require that logs have any phyiscal form (AC 43-9C mentions issues with signatures in digital logs but this E-Sign act has made it clear that digital...

Same. I keep a Google Drive folder with all log entries sorted both chronologically and separated out for ADs/STCs/W&B/etc. I also keep a spreadsheet of most recent replacement and inspection dates for all sorts of parts. If that's harder for the shop to use than a giant binder of logbook pages...

Why not just avoid the risk entirely by sharing scans/copies of logs? There is no reason for any A&P to ever have physical posession of your original logs.

What would be interesting about it? Would it influence your opinion? Neither being a pilot nor tearing down engines is really an authoritative qualification on engine ops. I once had an A&P pilot tell me that as long as my NA engine is “making good manifold pressure” that it’s running strong...

Oops!

I'm not sure this would even be legal in a DA-20. The AFM states "Flights are permissible in accordance with visual flight rules." Note: VFR, not VMC. Then again, the KOEL is seemingly referenced only in 91.213 (Inoperative Equipment), so it may not be controlling for IFR requirements...

Of course you cruise at full throttle. The only question is where the blue/red levers are. ;)