As someone who stays current on aircraft service bulletins, I learned everything about the importance of tracking these notices through years in the industry. Probably should have led with this: Cessna Aircraft Company issued a mandatory service bulletin last week affecting approximately 2,400 Cessna 172S models manufactured between 2019 and 2023. The bulletin addresses a potential fuel gauge calibration issue.
What Is Affected
The issue involves fuel sending units on aircraft with serial numbers 172S-12100 through 172S-15200. Affected gauges may indicate full when tanks contain less than usable fuel. That has gotten complicated with all the affected aircraft out there – this is a serious safety concern.
What Pilots Should Do
Verify your aircraft’s serial number against the bulletin. Until the repair is completed, visually verify fuel quantity before every flight. Do not rely solely on gauge readings. That is what makes proper preflight procedures so essential – trust but verify.
Flight schools should check their fleet immediately. The repair takes approximately two hours per aircraft.
