Stabilizers – Horizontal Stabilizer – Inspection / Replacement
Superseded. Comply with 2024-0064R1, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2019-0148R1
- Replaces
- 2019-0148R1
- Replaces
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform repetitive inspections of the horizontal stabilizer main spar every 10 flight hours starting from 25 June 2019. If cracks are found, immediate replacement of the horizontal stabilizer is required before further flight. The reinforced horizontal stabilizer modification must be completed by 30 June 2023 or within 2,400 flight hours after 6 August 2021, whichever occurs first, to terminate repetitive inspections.
Summary
EASA Airworthiness Directive 2021-0178R2 is an updated safety directive addressing the horizontal stabilizer on Airbus Helicopters EC 175 B models. It mandates inspections and modifications to detect and correct cracks in the horizontal stabilizer main spar to prevent potential loss of control. This directive applies to all EC 175 B helicopters except those with modification 99A05341 installed during production.
What changed
This revision extends the compliance time for the required modification involving replacement of the horizontal stabilizer with a reinforced version and installation of stabilizer rod assemblies. It also updates cross-references to related directives and retains previous inspection and replacement requirements. The directive supersedes earlier versions including AD 2019-0148R1 and incorporates changes due to delayed availability of modification kits.
Why it matters
This directive is critical for maintaining the structural integrity of the horizontal stabilizer on affected helicopters, directly impacting flight safety. Operators and maintenance organizations must comply to avoid potential catastrophic failure leading to loss of control. The extended compliance time provides practical relief while ensuring continued safety through mandatory inspections and corrective actions.
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