AD 2018-01-12 R1

AD Final Rules - 2018-01-12 R1.pdf
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AD Number:
2018-01-12 R1
Document Type:
AD Final Rules
Docket Number:
FAA-2017-0826
Subject Heading:
Airworthiness Directives; Airbus Helicopters
Subject:
Main Hydraulic System
Status:
Current
Citation:
Federal Register Volume 83, Number 42 (Friday, March 2, 2018)
Citation Publish Date:
03/02/2018
Effective Date:
03/02/2018
Make:
Airbus Helicopters
Model:
AS350B3
Product Type:
Aircraft
Product Subtype:
Rotorcraft
Affected AD:
Superseded AD:
2018-01-12
Affected By:
Superseded By:
Service/Office:
AIR-700: Compliance & Airworthiness Division
Office of Primary Responsibility:
AIR-730: International Validation Branch
CFR Part Reference:
Part 39
Comments:
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[Federal Register Volume 83, Number 42 (Friday, March 2, 2018)]


[Rules and Regulations]


[Pages 8927-8929]


From the Federal Register Online via the Government Publishing Office [www.gpo.gov]


[FR Doc No: 2018-03722]


––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. FAA-2017-0826; Product Identifier 2016-SW-084-AD; Amendment 39-19204; AD


2018-01-12 R1]


RIN 2120-AA64


Airworthiness Directives; Airbus Helicopters


AGENCY:
 
Federal Aviation Administration (FAA), Department of Transportation (DOT).


ACTION:
 
Final rule; correction.


––––––––––––––––––––––––––––––––––


SUMMARY:
 
We are revising airworthiness directive (AD) 2018-01-12 for Airbus Helicopters


Model AS350B3 helicopters to correct an error. As published, AD 2018-01-12 referenced an


incorrect monostable toggle switch part number (P/N) in the preamble and regulatory text. This


document corrects the error. In all other respects, the original document remains the same.


DATES:
 
This AD becomes effective March 2, 2018.


The Director of the Federal Register approved the incorporation by reference of certain


publications listed in this AD as of February 20, 2018 (83 FR 2039, January 16, 2018).


ADDRESSES:
 
For service information identified in this final rule, contact Airbus Helicopters, 2701


N Forum Drive, Grand Prairie, TX 75052; telephone (972) 641-0000 or (800) 232-0323; fax (972)


641-3775; or at http://www.helicopters.airbus.com/website/en/ref/Technical-Support_73.html. You


may review the referenced service information at the FAA, Office of the Regional Counsel,


Southwest Region, 10101 Hillwood Pkwy., Room 6N-321, Fort Worth, TX 76177. It is also available


on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2017-


0826.


Examining the AD Docket


You may examine the AD docket on the internet at http://www.regulations.gov by searching for


and locating Docket No. FAA-2017-0826; or in person at Docket Operations between 9 a.m. and 5


p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD, the


European Aviation Safety Agency (EASA) AD, any incorporated-by-reference service information,


the economic evaluation, any comments received, and other information. The street address for


Docket Operations (telephone 800-647-5527) is in the ADDRESSES section.
2


FOR FURTHER INFORMATION CONTACT:
 
George Schwab, Aviation Safety Engineer,


Safety Management Section, Rotorcraft Standards Branch, FAA, 10101 Hillwood Pkwy., Fort Worth,


TX 76177; telephone (817) 222-5110; email george.schwab@faa.gov.


SUPPLEMENTARY INFORMATION:


Discussion


AD 2018-01-12, Amendment 39-19153 (83 FR 2039, January 16, 2018) applied to Airbus


Helicopters Model AS350B3 helicopters with a dual hydraulic system installed. AD 2018-01-12


required revising the rotorcraft flight manual (RFM) to perform the yaw load compensator check


(ACCU TST switch) after rotor shut-down instead of during preflight procedures and to state that the


yaw servo hydraulic switch (collective switch) must be in the “ON” (forward) position before taking


off. AD 2018-01-12 also required modifying the yaw servo hydraulic switch and replacing the


bistable ACCU TST button with a monostable button.


We issued AD 2018-01-12 to prevent takeoff without hydraulic pressure in the tail rotor (T/R)


hydraulic system, loss of T/R flight control, and subsequent loss of control of the helicopter.


As published, AD 2018-01-12 contained an incorrect P/N in the preamble and regulatory text.


Specifically, the AD identified the Geneva Aviation P122 and P132 electrical console monostable


toggle switch P/N as “MS24658-16F.” The correct P/N is “MS24658-26F.”


Accordingly, we have determined that it is appropriate to take action to revise AD 2018-01-12 to


correct the Geneva Aviation P122 and P132 electrical console monostable toggle switch P/N. This


correction will ensure that it will be possible for operators to comply with the AD by referencing the


correct P/N for replacing the toggle switch.


No other part of the preamble or regulatory information has been changed. The final rule is


reprinted in its entirety for the convenience of affected operators.


Impact of the Correction


Since this action corrects an obvious error in referencing the P/N for a replacement part, it has no


adverse economic impact and imposes no additional burden on any person. Therefore, we find that


notice and opportunity for prior public comment are unnecessary and that good cause exists for


making this amendment effective in less than 30 days.


Related Service Information Under 1 CFR Part 51


We reviewed Airbus Helicopters Service Bulletin (SB) No. AS350-67.00.64, Revision 0, dated


February 25, 2015. This service information specifies procedures to install a timer relay and an


additional indicator light on the caution and warning panel. This modification provides an “OFF”


status indication of the yaw servo hydraulic switch by flashing a newly installed “HYD2” indicator


light on the caution and warning panel. Airbus Helicopters identifies performance of this SB as


modification 074622.


We also reviewed Airbus Helicopters SB No. AS350-67.00.65, Revision 0, dated August 25,


2016. This service information specifies procedures to replace the bistable push button ACCU TST


switch with a monostable push button switch. Airbus Helicopters identifies performance of this SB as


modification 074719.


This service information is reasonably available because the interested parties have access to it


through their normal course of business or by the means identified in the ADDRESSES section.


Other Related Service Information


We reviewed Airbus Helicopters SB No. AS350-67.00.66, Revision 1, dated October 22, 2015.


This service information specifies inserting specific pages of the SB into the rotorcraft flight manual.