FLYING LESSONS for April 3, 2025

Topics this week: > Admitting it can > We don’t know why > Everyone does it, it’s inconvenient, nothing bad happened

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FLYING LESSONS uses recent mishap reports to consider what might have contributed to accidents, so you can make better decisions if you face similar circumstances.  In most cases design characteristics of a specific airplane have little direct bearing on the possible causes of aircraft accidents—but knowing how your airplane’s systems respond can make the difference in your success as the scenario unfolds. So apply these FLYING LESSONS to the specific airplane you fly.  Verify all technical information before applying it to your aircraft or operation, with manufacturers’ data and recommendations taking precedence.  You are pilot in command and are ultimately responsible for the decisions you make.     

FLYING LESSONS is an independent product of MASTERY FLIGHT TRAINING, INC.

This week’s LESSONS:

Award-winning flight instructor and FLYING LESSONS reader Peg Ballou sent me this link to a tragic story, and wrote:

From the article:

The article provides more details:

Flight instructor Peg writes:

****

The hard part is that the person who must self-evaluate his/her current fitness for flight—that would be all of us—is the person least capable of making an objective assessment when it’s needed most. The “E” in IMSAFE is probably the hardest for self-awareness…even the experts don’t agree on what the E means. 

Assuming it stands for Emotion (or emotion is evaluated under S for Stress), it makes sense to think about situations that might negatively affect your fitness for flight now, when (presumably) you are not affected by crippling stress or emotion. Set some basic rules to help you make the evaluation later when you might need it. One might be: Am I affected by recent loss that came as a shock? 

Readers, what might be other basic rules for you? Do you have techniques that work for you? Have you ever had to make such a preflight decision? Did you make it, and if not, how did it come out?

It’s hard to detect when emotion might adversely affect safety. It’s even harder to admit it can.

Peg Ballou is AOPA’s 2025 Best Instructor for the Great Lakes region. Her company Ballou Skies Aviation in Bucyrus, Ohio is this year’s Great Lakes regional Best Flight School. Congratulations, Peg, and thank you for your guest editorial as this week’s LESSON

Questions? Comments? Supportable opinions? Let us know at [email protected]

Debrief 

Readers write about previous LESSONS

Reader/instructor Brian Sagi writes about last week’s LESSONS on the effects of weight and balance on aircraft performance:

That’s a point I try to make in all sorts of cases where pilots ask me to comment on their justification for exceeding airplane limitations—that we don’t always definitively know why a limitation exists, so we don’t have any reason to doubt its wisdom. I’m asked surprisingly frequently, and I think they’re trying to trap me into agreeing with them so they’ll quote me on it later…like my opinion supersedes engineering. Thanks, Brian.

Reader and monthly support Eric Hoel asks some questions:

Your 1961 N35 is indeed certified in the Utility category, which means it can withstand up to 4.4G without stress damage. At a maximum takeoff weight of 3125 pounds it is capable of handling up to 13,750 pounds (3125 x 4.4). If that airplane is recertified in the Normal category it is only required to withstand 3.8Gs, or 11,875 pounds (3125 x 3.8). This leaves an extra 1875 pounds to the structure’s actual limit (13,750 – 11,875). Divide that by 3.8 (the Normal limit) and you have 493 more pounds to add to the airplane’s original weight and remain in the Normal category. Why during certification this is reduced to 200 pounds (the usual gross weight increase for tip tanks) I do not know; perhaps FAA required some percentage required as a margin, or there was some other expedient available to the tip tank developer that kept the increase to that level. 

I’m sure there’s more to it than this (another case of not knowing all the details of a limitation), but it’s at least a partial explanation of how a gross weight increase (GWI) can be certified when reverting to a lesser stress certification at weights above the airplane’s originally certificated maximum.

It’s great how flexible our system can be and still help us be safe. I’m glad you enjoyed your flight. 

I have no personal experience with oxygen concentrators. I have heard Naval aviator, flight surgeon and Aviation Medical Examiner Keith Roxo of wingmanmed.com talk about them during a presentation, however. He said oxygen concentrators work well at lower altitudes, but since they depend on a certain amount of ambient oxygen to be able to concentrate it to a higher delivery rate, he does not think they can provide sufficient oxygen flow at the altitudes pilots need supplemental oxygen. If any reader has additional information please send it and I’ll provide an update. Thanks for the conversation, Eric.

Frequent Debriefer and cabin-class aircraft instructional expert Dave Dewhirst wraps it up this week:

You’re right, the insurance company would not likely have a way to find out about operation above maximum gross weight unless there was a claim and the weight and balance was calculated by investigators…or reliable witnesses recount an obvious overload condition like your first example. The three rationalizations you report—everyone does it, it isn’t convenient, nothing bad happened this time—are common. 

Here’s another one, a rationalization I had pitched to me asking for validation and approval not once, but on three different occasions from the same pilot: 

No, I don’t. Even more so since that means an overweight takeoff from a short dirt strip on the northbound trip. But even southbound off a long runway, no, I don’t agree.

That’s what’s going on out there. We don’t know everything about the reason for limitations. But we do know is that, if flying an aircraft outside its approved envelope, it won’t perform as expected. If anything out of the ordinary happens, you won’t have the margins you may need to save your life (and those of your passengers). Resist rationalization. Thank you as always, Dave.

More to say? Let us learn from you, at [email protected]

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Disclaimer

FLYING LESSONS uses recent mishap reports to consider what might have contributed to accidents, so you can make better decisions if you face similar circumstances. In most cases design characteristics of a specific airplane have little direct bearing on the possible causes of aircraft accidents—but knowing how your airplane’s systems respond can make the difference in your success as the scenario unfolds. Apply these FLYING LESSONS to the specific airplane you fly.

Verify all technical information before applying it to your aircraft or operation, with manufacturers’ data and recommendations taking precedence. You are pilot in command, and are ultimately responsible for the decisions you make.