[Federal Register Volume 82, Number 2 (Wednesday, January 4, 2017)]
[Rules and Regulations]
[Pages 716-718]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-30832]


-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2016-0733; Directorate Identifier 2015-SW-040-AD; 
Amendment 39-18762; AD 2016-26-04]
RIN 2120-AA64


Airworthiness Directives; Robinson Helicopter Company Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: We are adopting a new airworthiness directive (AD) for 
Robinson Helicopter Company (Robinson) Model R44, R44 II, and R66 
helicopters. This AD requires inspecting the main rotor blade (MRB). 
This AD was prompted by a determination that some MRBs may have reduced 
blade thickness due to blending out corrosion. The actions are intended 
to prevent the unsafe condition on these products.

DATES: This AD is effective February 8, 2017.
    The Director of the Federal Register approved the incorporation by 
reference of certain documents listed in this AD as of February 8, 
2017.

ADDRESSES: For service information identified in this final rule, 
contact Robinson Helicopter Company, 2901 Airport Drive, Torrance, CA 
90505; telephone (310) 539-0508; fax (310) 539-5198; or at http://www.robinsonheli.com. You may review a copy of 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-2016-0733.

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-2016-
0733; or in person at the Docket Operations Office between 9 a.m. and 5 
p.m., Monday through Friday, except Federal holidays. The AD docket 
contains this AD, any incorporated-by-reference service information, 
the economic evaluation, any comments received, and other information. 
The street address for the Docket Operations Office (phone: 800-647-
5527) is U.S. Department of Transportation, Docket Operations Office, 
M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue 
SE., Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Eric Schrieber, Aviation Safety 
Engineer, Los Angeles Aircraft Certification Office, Transport Airplane 
Directorate, FAA, 3960 Paramount Blvd., Lakewood, California 90712; 
telephone (562) 627-5348; email [email protected].

SUPPLEMENTARY INFORMATION: 

Discussion

    On May 27, 2016, at 81 FR 33609, the Federal Register published our 
notice of proposed rulemaking (NPRM), which proposed to amend 14 CFR 
part 39 by adding an AD that would apply to Robinson Model R44 and R44 
II helicopters with an MRB part number (P/N) C016-7, Revision N/C, A 
through Z, and AA through AE; and Model R66 helicopters with an MRB P/N 
F016-2, Revision A through E. The NPRM proposed to require a one-time 
visual inspection of the MRB for a crack, corrosion, dent, nick, and 
scratch and either altering the MRB or removing it from service.
    The NPRM was prompted by a report of a fatigue crack on a Model R44 
II helicopter at the MRB trailing edge that had grown to reach the 
blade spar. The FAA subsequently determined that some MRBs may have 
reduced blade fatigue resistance due to repair by blending out 
corrosion in the area of the crack site radius. The proposed 
requirements were intended to prevent an MRB fatigue crack, which could 
lead to MRB failure and subsequent loss of helicopter control.

Comments

    After our NPRM (81 FR 33609, May 27, 2016) was published, we 
received a comment from one commenter.

Request

    Robinson requested we change the applicability of the AD for part 
number (P/N) C016-7 from ``Revision N/C, A through Z, and AA through 
AE'' to ``Revision AA through AE.'' Robinson stated that P/N C016-7 did 
not exist until Revision AA and suggested that some technicians may 
wrongfully apply the proposed AD to P/N C016-5 Revisions W thru Z.
    We agree and have revised the AD accordingly.

FAA's Determination

    We have reviewed the relevant information, considered the comment 
received, and determined that an unsafe condition exists and is likely 
to exist or develop on other products of these same type designs and 
that air safety and the public interest require adopting the AD 
requirements as proposed with the change previously described. This 
change is consistent with the intent of the proposals in the NPRM (81 
FR 33609, May 27, 2016) and will not increase the economic burden on 
any operator nor increase the scope of the AD.

Related Service Information Under 1 CFR Part 51

    We reviewed Robinson R44 Service Bulletin SB-89, dated March 30, 
2015 (SB-89), for Model R44 and R44 II helicopters and Robinson R66 
Service Bulletin SB-13, dated March 30, 2015 (SB-13), for Model R66 
helicopters. SB-89 and SB-13 provide a one-time procedure to inspect 
each MRB for cracks, corrosion, and damage that may indicate a crack. 
If there is a crack, corrosion, or any damage, SB-89 and SB-13 specify 
removing the MRB from service and contacting Robinson. Otherwise, SB-89 
and SB-13 describe procedures to smooth the transition at the chord 
increase of each MRB to reduce the stress concentration.
    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.

[[Page 717]]

Differences Between This AD and the Service Information

    This AD requires compliance within the next 100 hours time-in-
service (TIS) or at the next annual inspection, whichever occurs first. 
The service information recommends compliance within 15 hours TIS or by 
May 31, 2015, whichever occurs first, for the R44 and R44 II 
helicopters and 10 hours TIS or by May 31, 2015, whichever occurs 
first, for the R66 helicopters.

Costs of Compliance

    We estimate that this AD affects 2,236 helicopters of U.S. Registry 
and that labor costs average $85 per work hour. Based on these 
estimates, we expect the following costs:
     The visual inspection requires 1 work hour. No parts are 
needed, so the cost per helicopter totals $85. The cost for the U.S. 
fleet totals $190,060.
     Altering each MRB, if necessary, requires 2 work hours and 
$65 for parts. We estimate a total cost of $235 per helicopter and 
$525,460 for the U.S. fleet.
     Replacing an MRB, if necessary, requires 3 work hours. 
Parts cost $19,900 for the Model R44 and R44 II and $20,900 for the R66 
helicopter for a total cost of $20,155 and $21,155, respectively, per 
MRB.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. Subtitle VII: Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    We are issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701: ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    This AD will not have federalism implications under Executive Order 
13132. This AD will not have a substantial direct effect on the States, 
on the relationship between the national government and the States, or 
on the distribution of power and responsibilities among the various 
levels of government.
    For the reasons discussed above, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866;
    (2) Is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979);
    (3) Will not affect intrastate aviation in Alaska to the extent 
that it justifies making a regulatory distinction; and
    (4) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared an economic evaluation of the estimated costs to comply 
with this AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive (AD):

2016-26-04 Robinson Helicopter Company: Amendment 39-18762; Docket 
No. FAA-2016-0733; Directorate Identifier 2015-SW-040-AD.

(a) Applicability

    This AD applies to Robinson Helicopter Company (Robinson) Model 
R44 and R44 II helicopters with a main rotor blade (MRB) part number 
(P/N) C016-7, Revision AA through AE installed; and Model R66 
helicopters with a MRB P/N F016-2, Revision A through E, installed; 
certificated in any category.

(b) Unsafe Condition

    This AD defines the unsafe condition as a fatigue crack on an 
MRB. This condition could result in failure of an MRB and loss of 
helicopter control.

(c) Effective Date

    This AD becomes effective February 8, 2017.

(d) Compliance

    You are responsible for performing each action required by this 
AD within the specified compliance time unless it has already been 
accomplished prior to that time.

(e) Required Actions

    Within 100 hours time-in-service or at the next annual 
inspection, whichever occurs first:
    (1) Clean each MRB in the area depicted in Figure 1 of Robinson 
R44 Service Bulletin SB-89, dated March 30, 2015 (SB-89), or 
Robinson R66 Service Bulletin SB-13, dated March 30, 2015 (SB-13), 
as applicable to your model helicopter.
    (2) Using 10X or higher power magnification and a light, 
visually inspect the upper and lower MRB surfaces and trailing edge 
as depicted in Figure 1 of SB-89 or SB-13, whichever applies to your 
helicopter, for a crack, a nick, a scratch, a dent, or corrosion. If 
there is a crack, a nick, a scratch, a dent, or any corrosion, 
repair the MRB to an airworthy configuration if the damage is within 
the maximum repair damage limits or remove the MRB from service.
    (3) Alter the MRB in accordance with Compliance Procedure, 
paragraphs 4 through 19, of SB-89 or SB-13, as applicable to your 
model helicopter. Equivalent tubing may be used for R7769-1 and 
R7769-6 tubes. Power tools may not be used for this procedure.

(f) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Los Angeles Aircraft Certification Office, FAA, 
may approve AMOCs for this AD. Send your proposal to: Eric 
Schrieber, Aviation Safety Engineer, Los Angeles Aircraft 
Certification Office, Transport Airplane Directorate, FAA, 3960 
Paramount Blvd., Lakewood, California 90712; telephone (562) 627-
5348; email [email protected].
    (2) For operations conducted under a 14 CFR part 119 operating 
certificate or under 14 CFR part 91, subpart K, we suggest that you 
notify your principal inspector, or lacking a principal inspector, 
the manager of the local flight standards district office or 
certificate holding district office before operating any aircraft 
complying with this AD through an AMOC.

(g) Subject

    Joint Aircraft Service Component (JASC) Code: 6210, Main Rotor 
Blades.

(h) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference of the service information listed in this 
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (i) Robinson R44 Service Bulletin SB-89, dated March 30, 2015.
    (ii) Robinson R66 Service Bulletin SB-13, dated March 30, 2015.
    (3) For Robinson Helicopter Company service information 
identified in this AD, contact Robinson Helicopter Company, 2901 
Airport Drive, Torrance, CA 90505; telephone (310) 539-0508; fax 
(310) 539-5198; or at http://www.robinsonheli.com.
    (4) You may view this service information at FAA, Office of the 
Regional Counsel, Southwest Region, 10101 Hillwood Pkwy,

[[Page 718]]

Room 6N-321, Fort Worth, TX 76177. For information on the 
availability of this material at the FAA, call (817) 222-5110.
    (5) You may view this service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Fort Worth, Texas, on December 15, 2016.
Stephen Barbini,
Acting Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 2016-30832 Filed 1-3-17; 8:45 am]
 BILLING CODE 4910-13-P