Fuel - Maintenance or Inspection Program - Revision
- Published
- Effective
- Deadline
- Replaces
- 2008-04-11 R1
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Boeing Model 707, 720, and 720B series airplanes must revise their maintenance or inspection programs within 60 days of the directive's effective date to incorporate the specified airworthiness limitations. They should also review and apply the allowances for alternative wiring materials as detailed. Compliance with the updated program is mandatory to mitigate fuel tank ignition risks.
Summary
Airworthiness Directive 2018-19-21 is a final rule issued by the Federal Aviation Administration affecting all Boeing Model 707, 720, and 720B series airplanes. It requires revising the maintenance or inspection program to incorporate new airworthiness limitations related to fuel system ignition prevention. This directive addresses safety concerns identified through manufacturer fuel system reviews.
What changed
This directive introduces a mandatory revision to the maintenance or inspection programs for the affected Boeing aircraft to include updated airworthiness limitations specified in Boeing 707/720 Airworthiness Limitations document D6-7552-AWL dated October 2016. It also clarifies allowances for alternative wire types and sleeving materials previously approved under earlier directives. The directive terminates AD 2008-04-11 R1 and supersedes certain previous requirements.
Why it matters
This directive is critical for aviation professionals because it addresses potential ignition sources inside fuel tanks that could lead to explosions, thereby enhancing flight safety. Operators and maintenance organizations must update their programs to comply with the new limitations to prevent latent failures or unsafe conditions. Compliance ensures continued airworthiness and regulatory adherence for the affected Boeing aircraft fleets.
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