This AD is against certain part number and serial numbered cylinder assemblies wherever they may be. End of story.
There is too much confusing information in the AD. The AD is for SAP affected cylinder assemblies whatever and wherever they are installed and stored. Then the focus should be the part numbers and serial numbers of the cylinder assemblies.
Table 1, 2, 3 and 4 are excess confusing verbiage. The lists describing engine models and series and aircraft the cylinders may be installed on are conflicting and incomplete.
What are the engine models that the cylinders are able to be installed on?
That’s the list to publish.
There was a table in the original AD that appeared to give that information; however it was removed in the revised AD.
In the Summary of the AD it indicates that certain SAP cylinder assemblies are installed in TCM 470, 520, and 550 series engines, Lycoming 320, 360, and 540 series engines and Avco Lycoming 540 series engines, and SAP 360 series engines. Note that Superior Air Parts advertise engines on their website they call XP-360.
The summary appears to affect all series of 320, 360, 470, 520 540, and 550 engines.
Table 1 lists affected TCM models.
Table 2 lists TCM engine models more specifically with aircraft they may be installed on.
Table 3 lists affected Lycoming and Avco Lycoming engine models.
Table 4 lists more specific Lycoming and Avco Lycoming engine models and aircraft they may be installed on.
The summary and four tables give conflicting information as to the models of engines that are affected.
In Tables 1 and 2:
0-470-G,-P,-R are listed in table 1; but are not listed in table 2.
I0-520-J is listed in table 1; but is not listed in table 2.
TSIO-520–BE,-CB,-CF is listed in table 2; but not in table 1.
And in Tables 3 and 4:
AIO-320-A,-B,-C are listed in table 3; but only AIO-320–B is listed in table 4.
0-360-A,-B,-C,-D,-F,-G,-J are listed in table 3; however 0-360-D,-G are not listed in table 4.
HI0-360-B,-C is listed in table 4; however only HI0-360-B is listed in table 3.
I0-360-E1A is missing from table 3; although it’s listed on table 4.
For I0-540-V is listed in table 3; however it is not listed in table 4;
and I0-540-E,-G are listed in table 4; however they are not listed in table 3.
There are engine models that are not listed in either table 3 or 4 (for example);
0-360-E1A6D,-E1AD,-E1BD,-E2AD,-E2BD and more.
Why all these tables of engine models and aircraft?
Just keep it simple.