Nose Gear Door Options?

[BlueMoon]

I recently purchased a 1962 M20C with some nose gear door damage. It looks like it currently has the “overlapping” doors but the parts catalog shows a different door setup. Can someone tell me what approval was used to install the “overlapping” doors? How much of the linkage differs between the original gear doors and the “overlapping” doors. 

Edited May 17, 2022 by srbrinly

[47U]

2 hours ago, srbrinly said:

Can someone tell me what approval was used to install the “overlapping” doors?

If the parts used are all Mooney production parts, and (in the opinion of the installing A&P/IA) it doesn’t delve into the major modification criteria, then it’s just a log book entry.  

My early C has doesn’t have direct linkage between the gear truss and doors like later models, so I’m not sure if your overlapping doors were modified to work with your door retraction system, or was the gear itself swapped out so the installation mirrors later models.

Someone with knowledge on how this was done will be along soon.  It’s not an uncommon modification. 

[KSMooniac]

I don't know the differences of the very early models enough to comment on linkage differences. My early J had the standard non-overlapping doors that had a lot of erosion, so before I repainted I replaced them with the newer overlapping version and they dropped right in. I think they're a superior configuration since they don't let air into the gear well easily.

Sent from my LM-V405 using Tapatalk

[BlueMoon]

7 hours ago, KSMooniac said:

I don't know the differences of the very early models enough to comment on linkage differences. My early J had the standard non-overlapping doors that had a lot of erosion, so before I repainted I replaced them with the newer overlapping version and they dropped right in. I think they're a superior configuration since they don't let air into the gear well easily.

Sent from my LM-V405 using Tapatalk
 

Thank you. I purchased good a used set of the older style doors from a salvage aircraft based on the parts manual, and didn’t realize the ones on the aircraft was upgraded to the overlapping ones.