Cessna 150 — Service Bulletins

This document is a Schedule of Airworthiness Directives for the Cessna 150 series aircraft, including the F150, 152, and F152 models. It specifically addresses the pneumatic stall warning system, detailing the requirements for checking its operation and necessary modifications for compliance. The document is intended for pilots and maintenance personnel to ensure the safety and airworthiness of the aircraft. It outlines the procedures for testing the stall warning system and the installation of required placards, as well as compliance timelines for the modifications mentioned.

• Check the pneumatic stall warning system before each flight.
• A properly functioning system will sound clearly when suction is applied at the stall warning opening.
• Install a placard stating 'PRE-FLIGHT TEST THE PNEUMATIC STALL WARNING SYSTEM' in view of the pilot.
• Compliance with the placard installation is required within 25 hours after September 5, 1968.
• Modifications can eliminate the requirements if specific part numbers are used.