Airworthiness DirectiveEASA AD US-2018-20-13

[Correction] Fuel - Motor-Operated Valve Actuators - Replacement / Maintenance or Inspection Program - Revision

Published: Nov 2, 2018
Effective: Nov 15, 2018
Deadline: Nov 15, 2018
Replaces: 2015-21-10
Replaces: 2015-19-04
Replaces: 2015-21-09

AI-generated summary of the official EASA document. Verify against the PDF before acting.

What to do

Affected operators must replace specified MOV actuators on left and right engine fuel shutoff valves and APU fuel shutoff valves where applicable. They must also revise their maintenance or inspection programs to incorporate the mandated airworthiness limitations by November 15, 2018. Operators should consult Boeing service information and FAA guidance to ensure proper compliance and part installation restrictions are followed.

Summary

Correction Fuel - Motor-Operated Valve Actuators - Replacement / Maintenance or Inspection Program - Revision is a Federal Aviation Administration (FAA) Airworthiness Directive (AD 2018-20-13) addressing certain Boeing Company airplanes including Model 737 (excluding -100, -200, -200C, -300, -400, and -500 series), Model 757, and Model 767 series. The AD targets latently failed motor-operated valve (MOV) actuators of fuel shutoff valves on engines and auxiliary power units (APUs). It mandates replacement of specific MOV actuators and revising maintenance or inspection programs to incorporate updated airworthiness limitations.

What changed

This AD introduces mandatory replacement of certain MOV actuators on affected Boeing 737, 757, and 767 airplanes and requires updating maintenance or inspection programs to include specific airworthiness limitations. It clarifies applicability to exclude older 737 models and adds Model 737-8 and future 737 airplanes. The AD also addresses public comments by confirming the necessity of restrictions on part installations and maintenance revisions to mitigate safety risks.

Why it matters

This AD is critical for aviation professionals because it addresses a latent failure risk in fuel shutoff valve actuators that could prevent shutting off fuel during engine or APU fires, potentially leading to structural damage. Operators, maintenance, and compliance teams must ensure affected parts are replaced and maintenance programs updated to maintain airworthiness and safety. The directive prevents unsafe part interchange among different airplane models, ensuring consistent compliance with safety standards.

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