Exhaust — Exhaust Ducts and Clamps — Inspection / Modification
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of PZL SW-4 helicopters must inspect clamps within 25 flight hours for Group 1 and inspect affected ducts every 25 flight hours for Group 2 helicopters. Damaged clamps or cracked ducts must be replaced or repaired before further flight. Group 2 helicopters must complete modification by installing improved ducts within 12 months of the directive's effective date. Installation of affected ducts is prohibited after modification or replacement, and for Group 3 helicopters from the effective date.
Summary
EASA Airworthiness Directive 2019-0052 is an airworthiness directive addressing exhaust ducts and clamps on all serial numbers of PZL SW-4 helicopters manufactured by WSK “PZL – ŚWIDNIK” S.A. It mandates inspections and modifications to prevent clamp cracking and exhaust duct damage that could compromise helicopter control. The directive includes detailed inspection, repair, and replacement instructions to ensure continued airworthiness.
What changed
This new directive introduces mandatory one-time and repetitive inspections of exhaust duct clamps and ducts on specified groups of PZL SW-4 helicopters. It requires corrective actions such as clamp replacement and duct repair or replacement with improved parts. Additionally, it prohibits installation of affected ducts after modification or replacement, establishing terminating actions for repetitive inspections.
Why it matters
This directive is critical for operators and maintenance organizations to prevent potential exhaust system failures that could lead to rotor damage and reduced helicopter control. Compliance ensures safety by addressing manufacturing deficiencies and maintenance installation issues that have caused clamp cracks and duct damage. It also helps maintain regulatory compliance and avoid operational disruptions.
More for Wsk Pzl-Swidnik SW4
All 10- EASA AD 2023-0072Rotorcraft Flight Manual / Supplement — AmendmentApr 5, 2023
- EASA AD 2021-0244Time Limits / Maintenance Checks — Airworthiness Limitations — AmendmentNov 9, 2021
- EASA AD 2020-0275Time Limits / Maintenance Checks – Airworthiness Limitations – AmendmentDec 10, 2020
- EASA AD 2020-0146Main Rotor — Main Rotor Hub — ReplacementJul 2, 2020
- EASA AD 2019-0300Main Rotor — Lower and Upper Torque Scissors — InspectionDec 12, 2019
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