NTSB Issues Urgent Safety Recommendation On Sikorsky S-76 | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Most Recent Daily Episodes

Episode Date

Airborne-Monday

Airborne-Tuesday

Airborne-Wednesday Airborne-Thursday

Airborne-Friday

Airborne On YouTube

Airborne-Unlimited-06.02.25

Airborne-NextGen-06.03.25

AirborneUnlimited-06.04.25

Airborne-AffordableFlyers-06.05.25

AirborneUnlimited-06.06.25

Sat, Nov 19, 2005

NTSB Issues Urgent Safety Recommendation On Sikorsky S-76

Recommends FAA Require Checks Into MRA Internal Leakage

The National Transportation Safety Board (NTSB) has issued two recommendations that the FAA immediately require Sikorsky S-76 operators conduct immediate checks into leakage in the internal assemblies of the helicopters' main rotor actuators.

The NTSB's specific recommendations are as follows:

(Urgent A-05-33)

  1. Conduct an immediate internal leakage test of all main rotor actuators with more than 500 hours since new and/or overhaul;
  2. Conduct subsequent recurring tests at a period not to exceed 500 hours;
  3. Report the test results to the Federal Aviation Administration and/or Sikorsky; and
  4. Correct any problems as necessary.

(Urgent A-05-35)

The NTSB recommends the FAA require Sikorsky S-76 helicopter operators to:

  1. Conduct immediate visual and laboratory examinations of hydraulic fluid and filter elements in hydraulic systems with actuators with more than 500 hours since new and/or overhaul for plasma flakes or other contamination that exceeds the manufacturers' allowable limits of concentration and size;
  2. Conduct subsequent recurring tests at a period not to exceed 500 hours;
  3. Report findings of contamination and flakes to the Federal Aviation Administration and/or Sikorsky and
  4. Correct any problems as necessary.

The NTSB also recommends the FAA direct the principal operations inspectors of all Sikorsky S-76 helicopter operators to reemphasize the importance of, and requirement for, a preflight check of control movement smoothness and flight control 'stick-jump' at every engine start.

FMI: View the complete recommendation letter (PDF)

Advertisement

More News

Citation Operators Get Another Flight Data Connection for QA

LinxUs System Adds Capabilities for Data-Driven Operators Textron Aviation announced another option for operators processing their post-flight data, adding interoperability with GE>[...]

ANN's Daily Aero-Linx (06.01.25)

Aero Linx: The de Havilland Moth Club Ltd The de Havilland Moth Club evolved from a belief that an association of owners and operators of Moth aeroplanes should be formed to create>[...]

NTSB Final Report: Bellanca 8GCBC

(Pilot) Inadvertently Applied Excessive Braking Action, And The Airplane Nosed Over Analysis: The pilot reported that, while landing at a remote, rough and uneven airstrip in a tai>[...]

Aero-News: Quote of the Day (06.01.25)

“MCADT is committed to rapidly integrating armed first-person view drones into the FMF, enhancing small-unit lethality and providing organic capabilities that warfighters cur>[...]

Classic Aero-TV: High-Speed Match-up - Venom and GE Rebirth A Legend

From 2017 (YouTube Edition): Major Engine Supplier Joins Forces With Small Aircraft Manufacturer… GE recently made an agreement with Venom Aircraft to supply engines for the>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2025 Web Development & Design by Pauli Systems, LC