EASA AD 2024-0154
Fuel — Fuel Tank / Bonding Straps — Inspection
Summary
EASA Airworthiness Directive 2024-0154 is an airworthiness directive addressing the inspection and maintenance of fuel tank bonding straps on Dornier 328-100 and Dornier 328-300 aeroplanes. It mandates repetitive inspections and provides an optional modification to replace existing bonding straps with nickel-plated versions to ensure electrical bonding integrity and prevent ignition risks. The directive applies to all manufacturer serial numbers of these aircraft models.
What Changed
This directive supersedes EASA AD 2023-0137 and introduces repetitive inspections of the affected bonding straps instead of a one-time inspection. It also introduces an optional modification that replaces the bonding straps with nickel-plated parts, which, if installed, terminates the need for further repetitive inspections. The directive retains previous inspection requirements while expanding compliance options.
Why It Matters
Maintaining proper bonding strap integrity is critical to preventing electrical ignition sources in fuel tanks, especially during lightning strikes. For operators and maintenance organizations, this directive ensures ongoing safety by requiring regular inspections and offering a modification to reduce inspection frequency. Compliance helps mitigate the risk of fire or explosion, protecting aircraft, crew, and passengers.
What To Do
Operators must inspect the bonding straps within 160 days after 26 July 2023 and then at intervals not exceeding 12 months as specified in the directive. If damage is found, the affected parts must be replaced before the next flight or repaired following manufacturer instructions. Alternatively, operators can install the approved nickel-plated bonding strap modification to terminate repetitive inspections.