EASA Regulations for Sikorsky S-76A

3 airworthiness directives and regulations affecting Sikorsky S-76A.

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New ADs and bulletins for Sikorsky S-76A, summarized like the ones below, every Monday.

EASA AD 2017-0064R2

Apr 19, 2018

Engine Fuel & Control — Drain Valve Assembly — Inspection / Replacement

{ "summary": "EASA Airworthiness Directive 2017-0064R2 is an updated safety directive addressing fuel leaks from the drain valve assembly on SAFRAN Helicopter Engines ARRIEL 1 series engines, which are installed on various helicopter models including Airbus Helicopters AS 350 and AS 365 series, MBB-BK117, Leonardo A 109 K2, and Sikorsky S-76A. The directive mandates inspections, wrapping, and replacement of affected drain valves to prevent fuel leaks that could lead to engine fire or in-flight

Airworthiness Directive
  • Safran ARRIEL 1
  • Safran Helicopter Engines ARRIEL 1
  • Airbus Helicopters AS 350
  • Airbus Helicopters AS 365
  • MBB-BK117
  • Leonardo A 109 K2
  • Sikorsky S-76A

EASA AD US-2017-19-01

Dec 15, 2017

Rotorcraft Flight Control - Main Rotor (M/R) Servo Pushrod Assembly - Inspection

Federal Register Volume 82, Number 227, Airworthiness Directive 2017-19-01 is a final rule issued by the FAA addressing Sikorsky Aircraft Corporation Model S-76A, S-76B, S-76C, and S-76D helicopters. It mandates inspection and marking of the main rotor servo pushrod assemblies with specific part numbers to prevent failure. The directive aims to enhance flight safety by addressing a critical component failure risk.

Airworthiness Directive
  • Sikorsky S-76
  • Sikorsky S-76A
  • Sikorsky S-76B
  • Sikorsky S-76C
  • Sikorsky S-76D

EASA SIB 2012-19R1

Jan 9, 2013

Uncommanded Engine In-Flight Shutdown triggered by the Tachometer Box

EASA Safety Information Bulletin SIB No. 2012-19R1 addresses uncommanded engine in-flight shutdowns triggered by the tachometer box on Turboméca ARRIEL 1E2 and ARRIEL 1S1 engines. These engines are installed on Eurocopter Deutschland MBB-BK 117 C-1 and C-2 helicopters, as well as Sikorsky S-76A and S-76C series helicopters. The bulletin provides information on the issue and recommends modifications to improve tachometer box reliability and mitigate shutdown risks.

Safety Information Bulletin
  • Eurocopter Deutschland MBB-BK 117 C-1
  • Eurocopter Deutschland MBB-BK 117 C-2
  • Sikorsky S-76A
  • Sikorsky S-76C