YABOONG

Intro

The steep spiral is a maneuver most of us only practice for the checkride. This time I actually had to use it.

I was in the right seat practicing for my CFI, with my instructor in the left seat. On the way back from a canceled pattern practice flight, every time I brought the RPM below 2,000, the yoke started shaking violently in my hands. We held 2,000 RPM and flew back to our home field at 4,000ft. Over the airport, I pulled the power to idle and never touched it again: a steep spiral down, into the downwind for RWY 32, and a power-off 180 all the way to touchdown. A week later, maintenance found the cause. Here is what happened and what we learned.

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Intro

Starting December 1, 2026, a Convective SIGMET is valid for 1 hour, not 2.

• Source: [NWS] Service Change Notice 26-85, [AIM][7-1-6] Inflight Aviation Weather Advisories

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Intro

How do I actually teach XC planning well?

• That question came up while I was putting together CFI teaching material, and I kept circling back to it.
• I ended up recalling every painful, confusing moment I’d had with navlogs through my PPL, IR, and CPL, and built something out of that.
• Here’s what I built, followed by the thought process behind it.

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Intro

It all started with one question

If I’m learning pilotage, why do I have to draw a straight line from departure to destination, like I was flying GPS direct?

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Intro

• The topic I underestimated the most was Commercial Operations.
• I soon realized that concepts like Private vs. Common Carriage, Wet vs. Dry Leases, Holding Out, and the complex web of regulations—Part 91, 119, 119.1(e), 121, 125, and 135—are deeply interconnected and very confusing.
• I’ve put a lot of effort into unraveling these tangled concepts to truly understand how they fit together.
• In this post, I’m sharing my findings and a simplified Decision Roadmap to help fellow pilots navigate these ‘gray areas’ with clarity.

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Intro

What would you do if your RPM gauge started fluctuating at 1,000 RPM during a full-power climb at night?

I recently faced this exact scenario on an IFR flight. Although I chose a precautionary landing over declaring an emergency, the experience revealed some critical gaps in my ADM. Here is a raw debrief of what happened during my night flight and what I learned.

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Intro

The Confusion Ends: Find out how the new AIM update permanently resolves the debate between the Departure and Upwind Legs.

• Source: [AIM] Explanation of Changes, [AIM][4-3-2] Airports with an Operating Control Tower

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Intro

• There’s a lot to study for your IR checkride oral, and trying to review everything can be inefficient when you’re short on time.
• So, I’ve summarized and simplified the essential knowledge into a very simple format.
• This isn’t a detailed, in-depth explanation of each topic.
• It’s meant for quick review when you want to rapidly go over everything you’ve studied, especially in the week leading up to your exam.

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개요

• 스프링 카프카 Batch Consumer 를 사용하는데, 의도하지 않은 @KafkaListener 호출이 발생했다.
• 스프링 카프카 소스를 까본 내용을 정리해보았다.

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개요

• Dependency Injection (의존관계 주입) 이란
  • Setter Based Injection (수정자를 통한 주입)
  • Constructor based Injection (생성자를 통한 주입)
• 스프링에서 사용할 수 있는 DI 방법 세가지
• 생성자 주입을 이용한 순환참조 방지
• 생성자 주입이 테스트 코드 작성하기 좋은 이유

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