These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.
The New Piper Aircraft, Inc. (formerly Piper Aircraft Corporation) PA-31 Series Airplanes
Jan 19, 2001
Airframe (PA 31P 350)Certain serial numbers: PA-31 31-2–31-900; PA-31 31-7300901–31-8312019; PA-31-300 31-2–31-900; PA-31-300 31-7300901–31-8312019; PA-31-350 31-5001–31-5004; PA-31-350 31-7305005–31-8553002; …. Only with: Equipped with Piper P/N 46653-00 or 47529-32 aluminum main landing gear door hinge assemblies (or FAA-approved equivalents); aircraft referred to as PA-31-310 are PA-31 airplanes.
The New Piper Aircraft, Inc. Models PA- 31, PA-31-300, PA-31-325, PA-31-350, and…
Jul 23, 1999
Airframe (PA 31P 350)Certain serial numbers: PA-31 31-2–31-8312019; PA-31-300 31-2–31-8312019; PA-31-325 31-2–31-8312019; PA-31-350 31-5001–31-8553002; PA-31P-350 31P-8414001–31P-8414050. Only with: Airplanes not equipped with the improved design elevators or elevator spar assemblies specified in the Material Required Table of Piper Service Bulletin No. 998A, dated August 4, 1997.