SB-121 Piper PA-18/PA-20/PA-22 Oil Radiator Lines

Piper Service Bulletin No. 121


  • Piper PA-18 "135" and PA-18A "135"
  • Piper PA-20 "135"
  • Piper PA-22 "135"

System: Engine

Issue Date: August 25, 1952

Subject: Oil Radiator Lines

Summary: Misalignment of the oil radiator lines on the Lycoming 0-290-D2 135 horsepower engines at the point where they pass through the rear engine baffle.

Open PDF: PIP_SB121.pdf