Would like to know the year my Rotax 912 ULS was built

Re: Would like to know the year my Rotax 912 ULS was built

by RotaxOwner Admin » 8 years ago

RotaxOwner Admin

59 1.6k 16.6k

4400385 is a ROTAX 912 ULS produced 07-Sep-1995
(its original configuration info is not found in the database)

Re: Would like to know the year my Rotax 912 ULS was built

by Faisal Asif » 8 years ago

Faisal Asif

5 4 3

We bought a Rotax 912 ULS engine from UAE Dealer on 30 Jan 2010 with serial number # 6775891 which went into a crash (the crash had nothing to do with the engine, it was working perfectly fine.) As we are the manufacturers of the aircraft, we are now working with the government agencies for the followup investigations. We want to know if the engine serial number # 6775891 was a ULS or ULS2 or ULS3 , It seems we have a conflicting set of documents to claim ULS3 and ULS2 status!

Thank you in advance.

Re: Would like to know the year my Rotax 912 ULS was built

by Rob Seaton » 8 years ago

Rob Seaton

3 1.32k 251

6775891 was manufactured as a 912ULS2.
It is easy to convert it to a S3, maybe this is what happened.

Re: Would like to know the year my Rotax 912 ULS was built

by Faisal Asif » 8 years ago

Faisal Asif

5 4 3

6775891 was manufactured as a 912ULS2.
It is easy to convert it to a S3, maybe this is what happened.

Thank You Rob for your quick reply.
Can you please highlight the steps it takes to convert ULS2 to ULS3?

Re: Would like to know the year my Rotax 912 ULS was built

by Rob Seaton » 8 years ago

Rob Seaton

3 1.32k 251

here is a sample of the certification statement:
Engine modified from propeller version S2 (fixed pitch) to version S3 (hydraulic governor drive)
Work performed as per Rotax 912/914 Heavy Maintenance Manual Edition 1 Rev 5.
Chapter 72-00-00 Section 3.9.1, 3.9.4, 3.9.5 for modification. Section 3.9.8 & 3.9.13 - 3.9.16 inclusive for reassembly.
• Removed version -2 propshaft p/n 837285, s/n xxxxxxx & replaced with -3 propshaft p/n 837284, s/n xxxxxxxx.
• Installed governor drive parts for hydraulic governor.
• Marked gearbox with new part number 877708 to reflect change to version 3.
• Friction torque set to xxx inch lbs.
• Marked engine dataplate as 912S 3.