CESSNA 180 — Service Bulletins

This Airworthiness Bulletin (AWB 28-013) addresses the over-wing fuel tank vent systems in early Cessna 180 models manufactured between 1953 and 1955. It highlights the potential dangers associated with the single point dynamic air pressure fuel tank venting systems and flexible rubber bladder fuel tanks. The bulletin aims to inform operators about the risks of fuel siphoning and erroneous fuel gauge readings due to vent blockage, particularly in icing conditions. It also outlines recommendations for operators to assess their aircraft's fuel tank installations and implement necessary modifications to enhance safety.

• Cessna 180 models from 1953 to 1955 are affected by this bulletin.
• Operators should be aware of the risk of fuel siphoning due to vent blockage.
• Erroneous fuel gauge readings can occur if the vent system is compromised.
• The FAA AD mandated the installation of a caution placard for affected aircraft.
• Operators should consider modifications as per Cessna Service Kit SK180-6.