SB-117B Piper PA-20/PA-22 Chafing of Master Switch Wires

Piper Service Bulletin No. 117B


  • Piper PA-20 serial numbers 20-1 thru 20-811
  • Piper PA-22 serial numbers 22-1 thru 22-363

System: Electrical

Issue Date: April 14, 1952

Subject: Chafing of Master Switch Wires

Summary: Immediate inspection of clearance between the aileron cable and the master switch wires (from the master switch to the ammeter).

Open PDF: PIP_SB117B.pdf