For those who can't access the body of the AD I've pasted it's "applicability" text here. So sorry for those affected - this is very painful. 2020 is the year that just keeps on giving...
This AD applies to the reciprocating engine models identified in paragraphs (c)(1) and (2) of this
AD with a Superior Air Parts, Inc. (SAP) crankshaft assembly, part number (P/N) SL36500-A20 or
P/N SL36500-A31, with serial numbers 82976-01; 82976-02; SP12-0003 through SP12-0089,
inclusive; SP13-0034 through SP13-0150, inclusive; or SP14-0151 through SP14-0202, inclusive;
installed.
(1) With SAP crankshaft assembly, P/N SL36500-A20, installed:
(i) SAP Model IO-360-series and O-360-series reciprocating engines.
(ii) Lycoming Engines (Lycoming) Model IO-360-B2F, IO-360-L2A, O-360, O-360-A2A, O360-A2D, O-360-A2E, O-360-A2F, O-360-A2G, O-360-B2A, O-360-C2A, O-360-C2C, O-360-
C2D, O-360-C2E, O-360-D2A, and O-360-D2B reciprocating engines.
(2) With SAP crankshaft assembly, P/N SL36500-A31, installed:
(i) SAP Model IO-360-series and O-360-series reciprocating engines.
(ii) Lycoming Model AEIO-360-H1A, IO-360-B1A, IO-360-B1B, IO-360-B1D, IO-360-B1E,
IO-360-B1F, IO-360-M1A, O-360, O-360-A1A, O-360-A1C, O-360-A1D, O-360-A2A, O-360-C1A,
O-360-C1G, O-360-C1C, O-360-C1E, and O-360-C1F reciprocating engines.
Note 1 to paragraph (c): This SAP crankshaft assembly may be installed as a replacement part
under parts manufacturer approval on the affected Lycoming engines.