200 Hr recurring Inspection of landing gear box per factory recommandation questions

[RonM2OC]

Our newer to us  IA says that the Mooney factory recommends an inspection of the landing gear box (1st at 500 hours, after 1st: every 200 Hours). (Includes: Take off box, open box, check for wear, lub, close up, return to aircraft) at a cost of ten hours of labor. Our Log books do not ever show any inspections have been done even after 40 annuals for our 1975 M20C.

Has any one every had this inspection done or heard of?

Any advise please? (to do it or not to do).

Thanks all

[orionflt]

there is a 1000 hour inspection on the gear box check out  SERVICE BULLETIN M20-279

Brian

[Andy95W]

It sounds like you're talking about the Dukes electric motor and its associated gears that move the jack shaft.

Yes, this does need regular service and inspection.  Not sure of the hour interval, I don't have my manuals in front of me right now.

10 hours seems a little high.  An A&P that works on Mooneys regularly could probably do the work and check the gear rigging in 3-5 hours.

[orionflt]

what he was referencing is service instruction M20-112A, it applies to the Dukes retrofit kit used on M20J's sn# 24-0001 -24-0377

 

Brian

[Marauder]

what he was referencing is service instruction M20-112A, it applies to the Dukes retrofit kit used on M20J's sn# 24-0001 -24-0377

 

Brian

Brian -- do you know what inspections are required for us Duke or ITT owners (model years 74 to 76)?

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[orionflt]

not off the top of my head, there are several different motors with different requirements, If i remember correctly you have to worry about the plastic gears in yours.

[orionflt]

Sorry chris, Brain fart, you fall under  AD 75-23-04 /SB 190B and that is a 100 hour inspection with a gear and endplay inspection every 200 hour. Ron, you should have the same inspection being required.

 

Brian

[Marauder]

Sorry chris, Brain fart, you fall under  AD 75-23-04 /SB 190B and that is a 100 hour inspection with a gear and endplay inspection every 200 hour. Ron, you should have the same inspection being required.

 

Brian

I just checked my logs. I see the notation that AD 75-23-04 is "not applicable" and in another spot, "not applicable by part number". Does this mean I have the ITT? Can there be anything else installed that would may those comments apply?

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[orionflt]

there were some dukes that did not fall under the inspection, but it would take pulling the SB/SI and reading thru all of them.

If your exempt from the inspection you fall into a small group. mostly johnson bar powered models  

even if the AD or recommended inspections do not apply I would still take a look at it every 10 yrs or so just for piece of mind.

 

Brian 

[Mooneymite]

If you have a '75 C model, I think you fall under this AD which sends you to Mooney SB M20-190, but check your actuator P/N.  Your logbook may reference either the AD, or the SB....I suspect it's been done multiple times since this issue is well known to electric gear C owners. AD Regulatory Information 75-23-04 MOONEY: Amendment 39-2415. Applies to all Mooney Model M20 series airplanes equipped with Mooney Electric Gear Systems incorporating a Dukes electric landing gear actuator, P/N 4196-00-1C.  Compliance required within the next 25 hours time in service after the effective date of this AD, unless already accomplished within the last 75 hours time in service, and thereafter at intervals not to exceed the time in service from the last inspection specified in Paragraphs (a) and (b).  To prevent further failures of the electric landing gear actuator, Dukes P/N 4196-00-1C, accomplish the following:   (a) Within the next 25 hours time in service, accomplish Parts I and III, and thereafter at every 200 hours time in service, accomplish Part I of Mooney Aircraft Corporation Service Bulletin M20-190, dated January 16, 1975, or later FAA approved revision, or by an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, Southwest Region, Federal Aviation Administration, Fort Worth, Texas.  (b) Within the next 25 hours time in service, and thereafter at every 100 hours time in service, accomplish Part II of Mooney Aircraft Corporation Service Bulletin M20-190 dated January 16, 1975, or later. Service Bulletin After you've done either part I, or part II a few times, it is pretty easy.  Definitely less than 10 hours unless it the gear lash doesn't pass the inspection.  The most time consumming part is removing/replacing the belly skins.

Edited February 16, 2016 by Mooneymite

[Marauder]

If you have a '75 C model, I think you fall under this AD which sends you to Mooney SB M20-190, but check your actuator P/N.  Your logbook may reference either the AD, or the SB....I suspect it's been done multiple times since this issue is well known to electric gear C owners. AD Regulatory Information 75-23-04 MOONEY: Amendment 39-2415. Applies to all Mooney Model M20 series airplanes equipped with Mooney Electric Gear Systems incorporating a Dukes electric landing gear actuator, P/N 4196-00-1C.  Compliance required within the next 25 hours time in service after the effective date of this AD, unless already accomplished within the last 75 hours time in service, and thereafter at intervals not to exceed the time in service from the last inspection specified in Paragraphs (a) and (.  To prevent further failures of the electric landing gear actuator, Dukes P/N 4196-00-1C, accomplish the following:   (a) Within the next 25 hours time in service, accomplish Parts I and III, and thereafter at every 200 hours time in service, accomplish Part I of Mooney Aircraft Corporation Service Bulletin M20-190, dated January 16, 1975, or later FAA approved revision, or by an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, Southwest Region, Federal Aviation Administration, Fort Worth, Texas.  ( Within the next 25 hours time in service, and thereafter at every 100 hours time in service, accomplish Part II of Mooney Aircraft Corporation Service Bulletin M20-190 dated January 16, 1975, or later. Service Bulletin After you've done either part a, or part b a few times, it is pretty easy.  Definitely less than 10 hours unless it the gear lash doesn't pass the inspection.  The most time consumming part is removing/replacing the belly skins.

When I get some time, I'm going through my logs again. I saw the "NA" notation a bunch of times in the logs. Just not sure what that means. I found Don Maxwell's article on it and he says it may mean I have an ITT installed. He said that he wouldn't trust the ITT either.

Hmmmm... And I thought everything about my plane.

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[1964-M20E]

200 hours is about 150 to 200 landing gear operations IMHO a little often.

I have the j-bar so I guess I will have to go to the doctor and get my shoulder scoped and inspected it's overdue.

[C-GHIJ]

Another reason to love the Johnston Bar.  If it's up, the gear is down.....

[Yetti]

6 hours ago, Marauder said:

I just checked my logs. I see the notation that AD 75-23-04 is "not applicable" and in another spot, "not applicable by part number". Does this mean I have the ITT? Can there be anything else installed that would may those comments apply?

 

Mine has the ITT.   Don Max's write up suggests ITT be treated like the Duke.

[Cyril Gibb]

4 hours ago, Marauder said:

When I get some time, I'm going through my logs again. I saw the "NA" notation a bunch of times in the logs. Just not sure what that means. I found Don Maxwell's article on it and he says it may mean I have an ITT installed. He said that he wouldn't trust the ITT either.

Hmmmm... And I thought everything about my plane.

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I checked the ADs for my 1975 M20F 20 months ago before I bought it.  Strictly speaking the ITT actuator is n/a by part number.  However, it's essentially the same as the Dukes with the same gear wear issues.  Mine comes out every annual for a clean/inspection/relube.  If the gears fail, you are landing gear up.  No manual extension.  Maybe it's because they do so many Mooneys, it sure doesn't take Clarences guys 10 hours.  Good grief that's excessive.

[Yetti]

The plane is already jacked up for the manual gear extension inspection.  Pull the panel, Pull the actuator, lube.  Reinstall, swing the gear (Also part of the annual)   Maybe 4 hours if you are slow.

[carusoam]

Dp

[carusoam]

I'm thread creeping... Cause I spent so much time putting this together! 

M20C pilot training - landing gear actuator simulator.

Life Fitness actually makes a machine for this... They call it a 'Tricep Press'.  Available at the local gym.

the J-bar is oriented a little differently but the tricep won't notice the difference.

It also works both triceps simultaneously in the event you are a CFI or want to avoid uneven strength building.

If the J bar gives you fear of aging, this device will remove any fear that comes your way...

Using this device, you can build enough strength over time that you will levitate out of your seat.

This comes from the memories called physical therapy.

 

[Marauder]

53 minutes ago, Cyril Gibb said:

I checked the ADs for my 1975 M20F 20 months ago before I bought it.  Strictly speaking the ITT actuator is n/a by part number.  However, it's essentially the same as the Dukes with the same gear wear issues.  Mine comes out every annual for a clean/inspection/relube.  If the gears fail, you are landing gear up.  No manual extension.  Maybe it's because they do so many Mooneys, it sure doesn't take Clarences guys 10 hours.  Good grief that's excessive.

I am pretty certain mine is an ITT as well. I have notations in my logs showing the actuator was re-lubed. Not sure how many of those included visual inspect of the gears. Will call when I schedule my annual to ask what they have done in the past.

[MB65E]

If you have the 20:1 gear set the inspection interval is different  than the 40:1. 

I had thought I was close on time on my inspection. But I rechecked what the SB allows and was able to extend...rrr. 

The kicker is the SB that allows the extension with the 40:1 gear set is not listed on the B-G airframes. I believe it's only listed on the J's but applies to the actuator and not the aircraft itself. Even the mooney website didn't list the SB under the older Airframes. 

Either way, make sure that actuator and motor are cared for! 

 

-Matt