Cirrus Pilot Proficiency Program (CPPP)-Conroe, KCXO

Determining Pattern Altitude

ByHank Gibson October 23, 2015October 23, 2015

Figuring out the pattern altitude at an airport should be pretty simple, right?  But, in this day of helpful technology, most pilots actually get it wrong.  How can you always get it right?  Well, it just takes about an extra 15 seconds.  Here’s how.

As outlined in the Aeronautical Information Manual, section 4-3-3, “traffic pattern altitudes for propeller-driven aircraft generally extend from 600 feet to as high as 1,500 feet above the ground.”  Further, in the Pilot’s Handbook of Aeronautical Knowledge on page 13-10, it states:  “1,000 AGL is recommended pattern altitude unless established otherwise.”

Okay, so for piston driver’s, we’ve got it narrowed down to 1,000 AGL (Above Ground Level for those who don’t like acronyms).  But wait!  There’s that very important phrase at the end of the last quote:  “unless established otherwise.”  That means not all airports have traffic pattern altitudes of 1,000 AGL, or else they wouldn’t put that line in there!

How do you find out what the TPA (Traffic Pattern Altitude) is for a certain airport if it’s not 1,000 AGL?  Great question!  Your first guess is probably to look on Foreflight.  Though this is a good start, it is not the full answer.

Let’s use an example.  Look up KAQO, the Llano Airport on Foreflight.  At the top of the page, the airport elevation is stated as 1,101′ MSL and the pattern altitude is stated as 1,902′ MSL.  From what we just learned, 1,902′ MSL is not 1,000 AGL, so is 1,902′ MSL otherwise established?

On the Airports page with KAQO pulled up, tap the A/FD tab, second to last on the left.  Scroll down to Llano Muni.  Read the whole entry.  Does it state in the entry that pattern altitude is different than 1,000 AGL?  It sure doesn’t.  So, because it is not otherwise established, pattern altitude at KAQO is 2,102′ MSL not 1,902′ MSL.

Where did Foreflight get that?  I have no idea.  Too often, though, pilots look at the Foreflight pattern altitude and don’t actually check the Airport Facilities Directory (A/FD).  Then, they get the pattern altitude wrong.

What does it look like when pattern altitude is otherwise established?  Look up KSGR, Sugar Land Regional, on your Foreflight app.  Foreflight states the elevation as 82′ MSL and the Pattern Altitude as 1,000′ MSL.  Is this correct?  Well, tap that A/FD button again and let’s find out.

On the second line of the A/FD entry, it says TPA-See Remarks.  Down in the remarks section, we find the following:

TPA-1000 (918) single engine piston acft, TPA-1500 (1418) for twin and turbojet acft, TPA-500 (418) for helicopters within 2NM.

Foreflight got it right this time for single engine pistons, but if you are in a twin, the pattern altitude is different.  What’s the lesson here?  Always check the A/FD and don’t always go by what Foreflight says.  The A/FD is always right and usually has a little more detail to help set you straight.

One last thing.  Both the AIM and the Pilot’s Handbook of Aeronautical Knowledge, when talking about pattern altitude, state, “When operating at an airport, traffic pattern altitudes should be maintained unless otherwise required by the applicable distance from cloud criteria in…section 91.155.”  91.155 defines basic VFR weather minimums.  So, to fully interpret what the AIM is saying, we have to take into account the type of airspace we are in to determine if we can safely and legally operate at pattern altitude at a particular airport.

For example, let’s say we are at KCVB, the Castroville Airport.  Pattern altitude there is 1,602 feet, which is 829 AGL.  CVB is Class G airspace up to 700 AGL, then Class E above that.  Let’s say there is a 700 AGL broken cloud layer.  Pattern altitude is 829 AGL, so you won’t be able to get up that high with a broken ceiling.  What altitude can you do pattern work at to stay legal?

Class G VFR weather minimums during the day below 1,200 AGL is 1 SM visibility and clear of clouds.  So, legally, you could fly at 699 AGL (which at CVB would be 1,472 MSL) while in the pattern and be legal.  Safe?  Maybe, but probably not if you are skimming the base of the clouds.  Is 1300 MSL a safer pattern altitude in this example?  Well, that is 527 AGL, so probably not, since towers tend to stick up that high sometimes.

Let’s go back to KSGR and put a 1,000 AGL overcast ceiling there.  SGR is Class D airspace and we already determined pattern altitude there was 1,000 MSL for piston singles.  VFR visibility and cloud clearance requirements in Class D airspace are 1,000 feet above clouds, 500 feet below clouds, and 2,000 feet horizontally from the clouds with 3 SM visibility.  In order to stay 500 feet below the clouds, you would be flying a 582 MSL pattern.  Safe?  Probably not, though it is legal.

To summarize, don’t take Foreflight’s word for pattern altitude.  Cross reference the A/FD (it only takes 15 seconds at the most) to verify.  If it’s cloudy, it’s really best to stay on the ground, but if you want to find out your legal pattern altitude with a cloud deck, cross reference 91.155.  I don’t recommend flying below pattern altitude because it is there for a reason.

Thanks For Flying With Us!

ByHank Gibson December 31, 2014January 5, 2015

From our family to yours, thank you for flying with Texas Top Aviation in 2014.  We wish everyone a Happy New Year and a great 2015!

Icon A5 Thought to Have Crashed in California

ByHank Gibson November 3, 2015November 5, 2015

 

Most pilots have seen the Icon A5 light sport amphibious aircraft.  It’s a neat design that can land on water or on a runway.  The high wing design with a pusher prop has foldable wings that allow it to be put on a trailer and towed behind a vehicle, allowing it to be offloaded at boat ramps (it also begs the question can you wakeboard behind it?).

Apparently, not all non-pilots know about the Icon A5.  Last week, one landed in the water near a beach in Southern California, but most of the beach goers and local authorities believed it had crash landed in the water.  Emergency crews were dispatched, but everyone was surprised when the two occupants crawled out on the wings, had a cup of coffee, and took back off.

You can read the full article on the Flying Magazine’s website.

MMOPA Operating Practices for the Piper PA46

ByHank Gibson February 22, 2019

I have the privilege of serving on the Malibu & M-Class Owners and Pilot’s Association Safety Committee.  Along with 6 other Piper PA46 instructors, we were tasked with two things last year leading up to the MMOPA Convention in Colorado Springs last October.  The first was to develop a Master Aviator Program (more on that in a later article).  The second was to develop Operating Practices for the Piper PA46 fleet that we as instructors could all get on board with to teach the same thing, allowing everyone in the fleet to fly approaches and patterns the same way.

When I started instructing in the piston Piper PA46 line (the Malibu, Mirage, and Matrix), I was surprised to find that there were no recommendations anywhere that I could find for approach and pattern power settings and airspeeds.  This led to some experimentation on my part trying to find out what works well for the airplane.  I had originally been given good training in a Malibu, but hadn’t flown one for several years, so my numbers were a bit rusty.

I have been in the Cirrus world for a very long time.  One thing I greatly appreciated from an instructing point of view about Cirrus was the abundance of guidance the factory gives instructors and pilots on how the airplane is supposed to be flown.  All CSIPs and all Cirrus pilots should (theoretically) be teaching and flying the exact same way.

I was quite surprised that Piper didn’t put out similar information.  I wasn’t as familiar with MMOPA at the time, but was surprised they didn’t have any information either.

I apparently wasn’t the only one with a desire to have a little bit more standardization.

So, without further ado, here are the MMOPA Operating Practices that the Safety Committee put together.  If you are a new Piper PA46 pilot, these numbers are what you will expect to use when you do your Initial training.  If you are a seasoned Piper PA46 pilot, you probably fly these numbers, or pretty close to them already.

These are tried and true power settings and speeds for the approach phase and landing phase.  They work. That was the goal of the Safety Committee:  put down in writing something repeatable to enhance safety.  I believe we have accomplished that.

Garmin 530/430 Missed Approaches

ByHank Gibson May 25, 2016May 29, 2016

Flying a missed approach can be stressful enough.  When you haven’t done one in a while and your GPS isn’t showing you how to get to the missed approach point and you can’t remember which button to press, that adds a lot more stress.  Recipe for disaster?  Quite possibly!

No need to fear, we are here to help.  The procedure for getting a Garmin 530 or 430 to give you missed approach guidance is actually simple and straightforward, if you know what to do!

Note: Because of the variety of different autopilot configurations in different airplanes, this article will focus solely on the GPS.

What the GPS is Thinking

The way Garmin designed the Garmin 530 and Garmin 430 is to be as helpful to pilots as possible.  Their thinking was, 95% of the time, a pilot will make a landing on an instrument approach.  This is pretty accurate as most of the time, this is what happens.  Most general aviation pilots don’t fly approaches to minimums all that often, thus negating the need for a missed approach.

Garmin designed their software with this in mind.  When an airplane crosses the missed approach point, the GPS will go into what’s called suspend mode (a SUSP annunciation appears above the OBS key).  It will keep the missed approach point as the active waypoint because it assumes the pilot is going to land.

This can be confusing to pilots.  This is what happens when software engineers and pilots come together. Engineers often believe they are smarter than pilots! (See the Airbus fly by wire roll out)

The Procedure

In the case of a missed approach, the button pushing on the GPS is actually relatively simple.  There is no SUSP key to take the GPS out of SUSP mode (thanks Garmin!).  Instead, you press the OBS key.  This will take the GPS out of SUSP mode, making the first waypoint on the missed approach procedure the active waypoint.  Your GPS will now give you guidance on the missed approach procedure.

If you are going missed off an ILS, LOC, or VOR approach, then there is one more key you’ll have to press. Your CDI needle (whether it is digital or analog, an HSI or just a CDI gauge) will be reading off the NAV radio and your CDI indication on the GPS will be VLOC.  After you press the OBS key, press the CDI key on the GPS so you will start getting course guidance from the GPS again.

That’s it.  Button pressing on the different autopilots will vary, but if you are familiar with yours, you’ll be able to tell it to follow the GPS and climb to the proper altitude.