SB-63 Piper J-3/J-5 Stabilizer Aluminum Yoke Casting

Piper Service Bulletin No. 63


  • Piper J-3 Series serial numbers 6117, 6130, 6205, 6276, 6282 thru 9101 (incorporating aluminum yoke)
  • Piper J-5 Series serial numbers 5-578 and up (incorporating aluminum yoke)
  • Piper L-4, L-4A and L-4B up to serial number 9524

System: Control

Issue Date: February 20, 1946

Subject: Stabilizer Aluminum Yoke Casting

Summary: Inspection of the stabilizer aluminum yoke casting, and if any cracks are apparent, the part should be replaced before further operation of the airplane.

Open PDF: PIP_SB63.pdf