AD 75-23-04 Electric Landing Gear

[TonyPynes]

I have read the AD which refers to SB M20-190B Part I, II and III.

At the risk of enduring the wrath of manual Johnson bar owners, I would like to get a sense of the cost of this AD from those who have complied with it.

I am in the buying process for an 1970 M20F with electric landing gear.

 

thanks

 

 

[Ned Gravel]

Quote: AustinPynes

I have read the AD which refers to SB M20-190B Part I, II and III.

At the risk of enduring the wrath of manual Johnson bar owners, I would like to get a sense of the cost of this AD from those who have complied with it.

I am in the buying process for an 1970 M20F with electric landing gear.

 

thanks

[TonyPynes]

Quote: edgargravel

Austin:

No wrath.  Just sadness.  Some know.  Some don't..........

BTW:  Good luck with sorting this out (no kidding this time..)

 

[Hank]

Ain't nothing wrong with 'lectric gear. They help keep your arms the same size!  :-)

[Ron McBride]

Austin

From Memory, on my 69F. The AD year to year is not much money, just lube the motor. When inspcetion time comes, take the plane to a MSC to remove and inspcet the gears. I think it was $500.00.  My gears were bad, I had a choice of 20:1 gears stock for $500.00, or the 40:1 gears $1000.00 plus laber to install, another $500.00. All told about $2000.00.

Tom at Top Gun did mine, Laser would be another great shop to get them. I have had my plane at both shops for work or parts. Don Maxwell in Texas has a great rep, as does Wilmar in Minn.

The 40:1 gears are a little slower, 6 or 7 seconds instead of 3 seconds, they don't slam into the gear wells, just seems to be less stress on the system. I am very pleased with the 40:1 gears.

Ron

[TonyPynes]

40:1 gears will go on my list of things to do.

[DaV8or]

Quote: N9154V

Austin

From Memory, on my 69F. The AD year to year is not much money, just lube the motor. When inspcetion time comes, take the plane to a MSC to remove and inspcet the gears. I think it was $500.00.  My gears were bad, I had a choice of 20:1 gears stock for $500.00, or the 40:1 gears $1000.00 plus laber to install, another $500.00. All told about $2000.00.

Tom at Top Gun did mine, Laser would be another great shop to get them. I have had my plane at both shops for work or parts. Don Maxwell in Texas has a great rep, as does Wilmar in Minn.

The 40:1 gears are a little slower, 6 or 7 seconds instead of 3 seconds, they don't slam into the gear wells, just seems to be less stress on the system. I am very pleased with the 40:1 gears.

Ron

[TonyPynes]

that is scary

[Shadrach]

The 40:1 gears are a good idea. I have seen M20s with  a doubler installed on the belly cross member were the motor is mounted. I'm not saying that it's a 20:1 thing, there are other factors that could stress the system, but slower equals less stress which is almost always preferable.

[Shadrach]

Quote: edgargravel

No wrath.  Just sadness.  Some know.  Some don't..........

BTW:  Good luck with sorting this out (no kidding this time..)

 

[fantom]

I think it appears antiquated and unrefined to passengers. However, those of us who know...know better!

[Ned Gravel]

Quote: Shadrach

Too funny and yet a bit true... ....  There's no substitute for the very tactile feedback one gets from using their right arm as an actuator...

[TonyPynes]

Quote: edgargravel

Too funny and yet a bit true... ....  There's no substitute for the very tactile feedback one gets from using their right arm as an actuator...

[Shadrach]

Quote: fantom

 Sorta like getting out to crank start you car

[Shadrach]

On the aviating dot com website about a week later, I related this story and three other Johnson bar drivers admitted to "never having had this happen to them - and it never will again.."

....One point for the electric gear systems.

[fantom]

I know it's been pointed out before, but real men don't need to pull their Johnsons

[Shadrach]

Quote: fantom

I know it's been pointed out before, but real men don't need to pull their Johnsons

[fantom]

Quote: Shadrach

Merely the refuge of "men" who don't know what it feels like to have a large shaft to manipulate.  

[Hank]

Quote: Shadrach

Make that 4 other Johnson bar drivers, but I'n not sure this a point for electric gear...It's no more difficult to forget and you have one less visual clue. 

[jetdriven]

This is why the manual gear Mooneys are worth the same as electric gear ones. Because the manual gear is simple and works well, the electric is easier to use but has a potential 3000$ worth of stuff to go wrong between the actuator, gearset, and landing gear relays.

[Hank]

But we are all vulnerable to the Mooney-equivalent of PEBKAC--what would that be? PEBPAC??

[fantom]

Quote: jetdriven

This is why the manual gear Mooneys are worth the same as electric gear ones. Because the manual gear is simple and works well, the electric is easier to use but has a potential 3000$ worth of stuff to go wrong between the actuator, gearset, and landing gear relays.

[DaV8or]

Quote: AustinPynes

that is scary

[DaV8or]

Quote: Hank

But we are all vulnerable to the Mooney-equivalent of PEBKAC--what would that be? PEBPAC??

[Magnum]

Quote: Hank

 Hmmm, let's see . . . Visual clues for gear position . . .

1) Position of round, white selector [up vs. Down] is quite noticeable, and almost at eye level. I double-check it by feel on final, just in case.

2) Green light for down, below the selector; orange light for up, beside the selector. All at the very top of the panel.

3) Mechanical indicator in the floor, lit at night, that works even when after total electrical failure and an emergency extension.

Count 'em off for Johnson bars, and see who has "one less" visual clue.   But then again, I don't have an oversized forearm or skinned knuckles to worry about, and I can store approach plates, my Flight Guide and a beverage between the seats. The biggest problem I have is the little rocker under the switch that turns the landing light off when I'm in the pattern and drop the gear at night--I gotta remember to turn it back on.