FAA orders fuel shutoff valve gasket checks on 1,030 US Boeing 737NGs
FAA final rule on Boeing 737-700 to -900ER fuel leaks at the engine fuel shutoff valve access panel: gasket inspections, leak tests, effective 1 December 2026.
The US Federal Aviation Administration has published a final airworthiness directive for certain older Boeing 737s, after leaks were found at a sealant gasket around the engine fuel shutoff valve. The rule covers 737-700, -700C, -800 and -900ER airplanes and affects 1,030 airplanes on the US registry, according to the FAA.
What the directive requires
The directive requires a detailed inspection of the left- and right-side form-in-place (FiP) gasket at the engine fuel shutoff valve access panel. Inspectors check that the sealant was installed correctly. The rule also requires a fluid leak test of the access panel area and corrective action where a leak or defect is found.
A companion directive covers the 737-8, -9 and -8200 with the same type of gasket. It is a separate rule, not part of this one.
The rule takes effect on 1 December 2026.
What triggered it
The FAA says the directive responds to a leak through the FiP gasket at the fuel shutoff valve access panel, found during a leak check. The proposed version was published in the Federal Register on 26 March 2026 (91 FR 14654).
What it means for passengers
A directive like this is a maintenance requirement. It does not ground the aircraft, and most passengers will not notice anything different. Operators of affected 737NGs must complete the inspections by the directive's terms; check your airline if you are concerned about a specific aircraft.
Sources
Featured image: Photo: Acroterion, CC BY-SA 4.0, via Wikimedia Commons. American Boeing 737-800 N923NN at Washington National. Source
