FAA · Information for Operators (InFO)
InFO 07010: Eurocopter AS 350 and AS 355E—Serrated Lock Washers
In Brief
What It Addresses
This InFO announces Special Airworthiness Information Bulletin (SAIB) 07-22R1, alerting owners and operators of Eurocopter France (EFC) AS 350 and AS 355E helicopters of a potential hazard concerning the serrated lock washers (part number 341A75-3000-20) on the lower servo-control rod end-fittings on flight control actuators.
Why It Matters
The FAA’s Aircraft Certification Service has become aware of the potential for excessive wear on the inner tang of the serrated lock washer, P/N 341A75-3000-20 located on the servo control lower rod end-fittings, and possible separation of that tang. If proper torque is not applied to the jam nut this condition could lead to flight control disconnect and subsequent loss of control.
Recommended Action
Directors of operations, directors of maintenance, chief pilots, fractional ownership program managers, training managers, pilots, and mechanics operating/maintaining ECF AS 350 and AS 355E helicopters should review SAIB 07-22R1; mechanics and pilots should implement its specific recommended practices. Approved by: AFS-200
From the Document: selected source passages, quoted as written, for a quick overview.
InFOInformation for Operators
U.S. Department InFO 07010
of Transportation DATE 5/16/2007
Federal Aviation
Administration Flight Standards Service
Washington, DC http://www.faa.gov/other_visit/aviation_industry/airline_operators/airline_safety/info An InFO contains valuable information for operators that should help them meet certain administrative, regulatory, or operational requirements with relatively low urgency or impact on safety.
Subject: Eurocopter AS 350 and AS 355E—Serrated Lock Washers
Purpose: This InFO announces Special Airworthiness Information Bulletin (SAIB) 07-22R1, alerting owners and operators of Eurocopter France (EFC) AS 350 and AS 355E helicopters of a potential hazard concerning the serrated lock washers (part number 341A75-3000-20) on the lower servo-control rod end-fittings on flight control actuators.
Background: The FAA’s Aircraft Certification Service has become aware of the potential for excessive wear on the inner tang of the serrated lock washer, P/N 341A75-3000-20 located on the servo control lower rod end-fittings, and possible separation of that tang. If proper torque is not applied to the jam nut this condition could lead to flight control disconnect and subsequent loss of control. SAIB 07-22R1 addresses the potential hazard, and can be downloaded at the following web address:
http://www.faa.gov/aircraft/safety/alerts/saib/media/SW-07-22R1.pdf For further information concerning this SAIB, please contact Mike Hemann, Safety Management Group of the Rotorcraft Standards Staff, ASW-112, at 817-222-5336.
Recommended Action: Directors of operations, directors of maintenance, chief pilots, fractional ownership program managers, training managers, pilots, and mechanics operating/maintaining ECF AS 350 and AS 355E helicopters should review SAIB 07-22R1; mechanics and pilots should implement its specific recommended practices.
Approved by: AFS-200
Source: Federal Aviation Administration — www.faa.gov. Reproduced from the published record; FlightPush adds formatting only.
InFO 07010