
[Federal Register Volume 76, Number 214 (Friday, November 4, 2011)]
[Rules and Regulations]
[Pages 68301-68304]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-28355]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2011-1182; Directorate Identifier 2010-SW-010-AD; 
Amendment 39-16853; AD 2011-23-02]
RIN 2120-AA64


Airworthiness Directives; Bell Helicopter Textron, Inc. (Bell), 
Model 205A-1, 205B, 210, and 212 Helicopters

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule; request for comments.

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

SUMMARY: This amendment supersedes an existing airworthiness directive 
(AD) for Bell Model 205B and 212 helicopters with certain main rotor 
blade (blade) assemblies installed. That AD currently requires washing 
the upper and lower surfaces of each blade and visually inspecting the 
grip plates, doublers, and the remaining upper and lower surfaces of 
the blades in the area between blade stations 24.5 to 40 for an edge 
void, corrosion, or a crack. This amendment retains the requirements of 
that AD for the affected part-numbered blades but increases the scope 
and frequency of the inspections and expands the applicability to 
include the Model 205A-1 and 210 helicopters, additional blade part 
numbers, and all helicopter serial numbers for the affected helicopter 
models. This amendment also requires applying a light coat of 
preservative oil (C-125) to all surfaces of the blade in addition to 
the inspection areas as required in the existing AD. This amendment is 
prompted by an additional report of a fatigue crack on a blade 
installed on a Model 212 helicopter. The actions specified by this AD 
are intended to detect an edge void, corrosion, or a crack on a blade, 
and to prevent loss of a blade and subsequent loss of control of the 
helicopter.

DATES: Effective November 21, 2011.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of November 21, 2011.
    We must receive comments on this AD by January 3, 2012.

ADDRESSES: Use one of the following addresses to comment on this AD.
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: (202) 493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE., Washington, DC 20590.
     Hand Delivery: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE., Washington, DC 20590, between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays.
    You may get the service information identified in this AD from Bell 
Helicopter Textron, Inc., P.O. Box 482, Fort Worth, TX 76101, telephone 
(817) 280-3391, fax (817) 280-6466, or at http://www.bellcustomer.com/files/.
    Examining the Docket: You may examine the docket that contains the 
AD, any comments, and other information on the Internet at http://www.regulations.gov, or in person at the Docket Operations office 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The Docket Operations office (telephone (800) 647-5527) is 
located in Room W12-140 on the ground floor of the West Building at the 
street address stated in the ADDRESSES section. Comments will be 
available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Michael Kohner, Aviation Safety 
Engineer, FAA, Rotorcraft Directorate, Rotorcraft Certification Office, 
2601 Meacham Blvd., Fort Worth, Texas 76137, telephone (817) 222-5170, 
fax (817) 222-5783.

SUPPLEMENTARY INFORMATION: On December 21, 2009, we issued AD 2010-03-
03, Amendment 39-16186 (75 FR 5681, February 4, 2010), to require at 
specified intervals washing the upper and lower surfaces of each blade 
and visually inspecting the grip plates, doublers, and the remaining 
upper and lower surfaces of the blades in the area from blade stations 
24.5 to 40 for an edge void, corrosion, or a crack using a 3x power or 
higher magnifying glass. That AD was prompted by two reports of fatigue 
cracks on blades installed on Model 212 helicopters. The cause of the 
cracks has been attributed to inadequate adhesive bonding during 
manufacture in the area between the grip plate and mating doubler 
surface. A crack first appears in the grip plate, which can be detected 
visually with the blade installed on the helicopter. That condition, if 
not detected, could result in loss of a blade and subsequent loss of 
control of the helicopter.
    Since issuing AD 2010-03-03 (75 FR 5681, February 4, 2010), we have 
received another report of a fatigue crack on a blade installed on a 
Model 212 helicopter. The crack at the blade

[[Page 68302]]

attachment bolt hole has been attributed to a large disbond, which 
developed in the adhesive between the lower grip plate and mating 
doubler. The lower grip plate was not cracked. The disbond initiated at 
the tip of the grip plate and propagated to the blade attachment bolt 
hole. Corrosion was found on the doubler suggesting an edge void was 
present for an extended amount of time and went undetected by the 
inspections being performed by the operator. Further analysis and 
investigation by the manufacturer have revealed that the inspections on 
the blade as required by the current AD need to be expanded and 
performed at an increased frequency and on additional part-numbered 
blades of similar design and manufacture, which can also be installed 
on the Model 210 and 212 helicopters.
    We have also determined that blade part numbers listed in the 
current AD may also be installed on Model 205A-1 helicopters modified 
in accordance with Supplemental Type Certificate (STC) No. SH5132NM or 
SH5976NM. The affected blade can also be installed on all helicopter 
serial numbers for the affected helicopter models. Therefore, this 
amendment retains the same requirements as AD 2010-03-03 (75 FR 5681, 
February 4, 2010) for the affected part-numbered blades but increases 
the scope and frequency of the inspections and expands the 
applicability to include the Model 205A-1 and 210 helicopters, 
additional blade part numbers, and all helicopter serial numbers for 
the affected helicopter models. Finally, after further investigation, 
we discovered the requirement of the current AD to apply the oil only 
to the specified inspection areas was not the original intent of the 
AD. Therefore, this AD also requires applying a light coat of 
preservative oil (C-125) to all surfaces of the blade to prevent 
corrosion from the process of washing the blade surfaces in preparation 
for the inspections in addition to those areas as required in the 
current AD.
    We have reviewed Bell Helicopter Alert Service Bulletin (ASB) No. 
205B-08-51 and ASB No. 212-08-130, both Revision B and dated January 
11, 2011, applicable to Model 205B and Model 212 helicopters, 
respectively, and ASB No. 210-08-03, Revision B, dated January 10, 
2011, applicable to Model 210 helicopters, which describe procedures 
for initial and repetitive inspections of certain part-numbered blades 
on certain serial-numbered helicopters for signs of an edge void, 
corrosion, or a crack, including a hair-line crack in the blade paint 
finish in the inspection area as shown in Figure 1 of the ASBs between 
blade stations 24.5 and 85.
    This AD differs from the ASBs as follows:
     We specifically require only wiping each of the bond lines 
at the edges of both grip plates and each of the layered doublers (bond 
lines) on the upper and lower surfaces of each affected blade with an 
alcohol-soaked cloth. This is required immediately before performing a 
visual inspection using a 3x or higher magnifying glass and a bright 
light to detect an edge delamination along any of the bond lines. This 
was done to avoid any possible confusion with having to wipe the entire 
surface blade area from blade station 24.5 to 85, which could make 
performing a reliable inspection difficult. The ASBs state to ``wipe 
the area to be inspected with an alcohol-soaked cloth.''
     The ASBs use the phrase ``bond lines between doublers, 
grip plates, and skin'' to describe the bond lines, and we use ``bond 
lines at the edges of both grip plates and each of the layer 
doublers.''
     The ASBs use the phrase ``cracks in the bond lines between 
doublers or grip plates'' to describe a separation of the doubler or 
grip plate along an edge, and we use the term ``edge delamination.''
     We do not specify each helicopter serial number (S/N) in 
our AD; the ASBs do specify the helicopter S/Ns.
    Since an unsafe condition has been identified that is likely to 
exist or develop on other helicopters of these same type designs, this 
AD supersedes AD 2010-03-03 (75 FR 5681, February 4, 2010), retaining 
the same requirements for the affected part-numbered blades but 
increasing the scope and frequency of the inspections and expanding the 
applicability to include the Model 205A-1 and 210 helicopters, 
additional blade part numbers, and all helicopter serial numbers for 
the affected helicopter models.
    The short compliance time involved is required because the 
previously described critical unsafe condition can adversely affect the 
structural integrity and controllability of the helicopter. Therefore, 
the AD must be issued immediately to require the following actions 
within 25 hours time-in-service (TIS) and thereafter at intervals not 
to exceed 25 hours TIS:
     Washing the upper and lower blade surfaces using a 
solution of cleaning compound (C-318) and water.
     Visually inspecting each of the upper and lower grip 
plates and doublers of the blade for their entire length and chord 
width for an edge void, any corrosion, or a crack.
     Wiping each of the bond lines at the edges of both grip 
plates and each of the layered doublers (bond lines) on the upper and 
lower surfaces of each affected blade with an alcohol-soaked cloth (C-
385) in the area from blade stations 24.5 to 85.
     Immediately thereafter, using a 3x power or higher 
magnifying glass and a bright light, visually inspecting each of the 
bond lines on the upper and lower surfaces of the blade in the 
inspection area for any edge delamination, as indicated by a dark line 
located along any bond line, or a crack in the paint finish.
     Applying a light coat of preservative oil (C-125) to all 
surfaces of the blade.
     Removing paint from areas in which an edge delamination 
along any bond line of a grip plate or doubler, or a crack in the blade 
paint finish is discovered, by sanding with 180-220 grit paper to 
determine if an edge void or a crack exists in the blade.
     Replacing any blade that has a crack in any grip plate or 
doubler with an airworthy blade.
     Replacing any blade that has an edge void or any corrosion 
with an airworthy blade or repairing the blade if the damage is within 
the maximum repair damage limits. The maximum repair damage limitations 
are contained in the applicable Component and Repair Overhaul Manual.
     Replacing any blade that has a crack in the blade skin 
with an airworthy blade, or repairing the blade if the damage is within 
the maximum repair damage limits.
    Since a situation exists that requires the immediate adoption of 
this regulation, it is found that notice and opportunity for prior 
public comment hereon are impracticable and that good cause exists for 
making this amendment effective in less than 30 days.
    We estimate that this AD will affect 132 helicopters in the U.S. 
registry. We also estimate that washing and visually inspecting each 
blade will take about 1 work hour. If an edge void, corrosion, or a 
crack is found, replacing a blade with an airworthy blade will take 
about 24 work hours. The average labor rate is $85 per work hour. 
Required parts will cost about $85,597 for a replacement blade. Based 
on these figures, we estimate the total cost of the AD on U.S. 
operators to be $356,917, assuming that 24 inspections are done each 
year on each helicopter and that 1 blade is replaced.

Comments Invited

    This AD is a final rule that involves requirements affecting flight 
safety, and

[[Page 68303]]

we did not precede it by notice and an opportunity for public comment. 
We invite you to send any written relevant data, views, or arguments 
regarding this AD. Send your comments to an address listed under the 
ADDRESSES section. Include the docket number ``FAA-2011-1182; 
Directorate Identifier 2010-SW-010-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of the AD. We will consider 
all comments received by the closing date and may amend the AD in light 
of those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive concerning this AD. Using the search function of the docket Web 
site, you can find and read the comments to any of our dockets, 
including the name of the individual who sent the comment. You may 
review the DOT's complete Privacy Act Statement in the Federal Register 
published on April 11, 2000 (65 FR 19477-78).

Regulatory Findings

    We have determined that 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 the regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the 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. See the AD docket to examine the economic evaluation.

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.

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 removing Airworthiness Directive (AD) 
2010-03-03; Amendment 39-16186 (75 FR 5681, February 4, 2010), and by 
adding a new AD to read as follows:

2011-23-02 Bell Helicopter Textron, Inc.: Amendment 39-16853; Docket 
No. FAA-2011-1182; Directorate Identifier 2010-SW-010-AD. Supersedes 
AD 2010-03-03, Amendment 39-16186 (75 FR 5681, February 4, 2010), 
Docket No. FAA-2010-0065, Directorate Identifier 2009-SW-01-AD.

    Applicability: Model 205A-1, 205B, 210 and 212 helicopters with 
a main rotor blade (blade), part number (P/N) 204-012-001-023 or -
033; 210-015-001-101; 212-015-501-005, -111, -113, -115, -117, -119, 
or -121, installed, certificated in any category.

    Note 1:  Bell Helicopter Model 205A-1 helicopters, modified by 
Supplemental Type Certificate (STC) No. SH5132NM or SH5976NM, may 
have affected part-numbered blades installed.

    Compliance: Required as indicated.
    To detect an edge void, corrosion, or a crack on a blade, to 
prevent the loss of a blade and subsequent loss of control of the 
helicopter, do the following:
    (a) Within 25 hours time-in-service (TIS), unless accomplished 
previously, and thereafter at intervals not to exceed 25 hours TIS:
    (1) Wash the upper and lower surfaces of each affected blade 
with a solution of cleaning compound (C-318) and water. Rinse 
thoroughly and wipe dry.
    (2) Visually inspect each of the upper and lower grip plates and 
doublers of the blade for their entire length and chord width for an 
edge void, any corrosion, or a crack. Pay particular attention to 
any crack in the paint finish near or at a bond line that follows 
the outline of a grip plate or doubler.

    Note 2:  The inspections required by paragraphs (a)(2) and 
(a)(4) of this AD do not require removal of the blades from the main 
rotor hub and can be accomplished while the blades are installed on 
the helicopter.

    (3) Wipe each of the bond lines at the edges of both grip plates 
and each of the layered doublers (bond lines) on the upper and lower 
surfaces of each affected blade with an alcohol-soaked cloth (C-385) 
in the area from blade stations 24.5 to 85 (inspection area) as 
depicted in Figure 1 of Bell Helicopter Alert Service Bulletin (ASB) 
No. 205B-08-51 for the Model 205B helicopters or ASB No. 212-08-130 
for the Model 212 helicopters (and the Model 205A-1 helicopters), 
both Revision B, and both dated January 11, 2011; or ASB No. 210-08-
03, Revision B, dated January 10, 2011, for the Model 210 
helicopters, as appropriate for your model helicopter. Wipe dry with 
a clean cloth.
    (4) Immediately after accomplishing paragraph (a)(3) of this AD, 
using a 3x power or higher magnifying glass and a bright light, 
visually inspect each of the bond lines on the upper and lower 
surfaces of the blade in the inspection area for any edge 
delamination, as indicated by a dark line located along any bond 
line, or a crack in the paint finish. An edge delamination is 
defined as a separation of the detail parts along an edge.

    Note 3:  An edge delamination along the edge of a grip plate or 
doubler, or ``any potential cracks in the bond lines between 
doublers or grip plates'' as described in the ASBs, is indicated by 
the presence of excess alcohol bleeding out of an edge void. The 
excess alcohol in the void will appear as a dark line along the bond 
line. A crack in the paint finish which follows the outline of a 
grip plate or doubler may indicate a possible edge void.

    (5) If there is no edge void, corrosion, crack, an edge 
delamination, or a crack in the paint finish, apply a light coat of 
preservative oil (C-125) to all surfaces of the blade.
    (b) Before further flight:
    (1) If there is any edge delamination along any bond line of a 
grip plate or doubler, or a crack in the paint finish:
    (i) Remove the paint in the affected area by lightly sanding 
with 180-220 grit paper in a span-wise direction to determine if 
there is an edge void, or if the grip plate, doubler, or skin is 
cracked. If any parent material is removed during the sanding 
operation, replace the blade with an airworthy blade or repair the 
blade if the amount of parent material removed is within the maximum 
repair damage limits.

    Note 4:  The maximum repair damage limits are contained in the 
applicable Component and Repair Overhaul Manual.

    (ii) If there is an edge void, determine the depth and length 
using a .0015 inch feeler gauge.

[[Page 68304]]

    (iii) If there is an edge void in a grip plate or doubler near 
the outboard tip, tap inspect the affected area to determine the 
size and shape of the void.
    (iv) Repair the blade if the edge void is within the maximum 
repair damage limits or replace the blade with an airworthy blade.
    (v) If there is not an edge void or a crack, refinish the sanded 
area.
    (2) If there is a crack in any grip plate or doubler, replace 
the blade with an airworthy blade.
    (3) If there is a crack in the blade skin, replace the blade 
with an airworthy blade, or repair the blade if the damage is within 
the maximum repair damage limits.
    (4) If there is any corrosion, replace the blade with an 
airworthy blade or repair the blade if the damage is within the 
maximum repair damage limits.
    (c) To request a different method of compliance or a different 
compliance time for this AD, follow the procedures in 14 CFR 39.19. 
Contact the Manager, Rotorcraft Certification Office, Attn: Michael 
Kohner, Aviation Safety Engineer, FAA, Rotorcraft Directorate, 2601 
Meacham Blvd., Fort Worth, Texas 76137, telephone (817) 222-5170, 
fax (817) 222-5783, for information about previously approved 
alternative methods of compliance.
    (d) The inspection area is depicted in Figure 1 of Bell 
Helicopter Alert Service Bulletin No. 205B-08-51 or No. 212-08-130, 
both Revision B, and both dated January 11, 2011; or No. 210-08-03, 
Revision B, dated January 10, 2011. The incorporation by reference 
of these documents was approved by the Director of the Federal 
Register, in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. 
Copies may be obtained from Bell Helicopter Textron, Inc., P.O. Box 
482, Fort Worth, TX 76101, telephone (817) 280-3391, fax (817) 280-
6466, or at http://www.bellcustomer.com/files/. Copies may be 
inspected at the FAA, Office of the Regional Counsel, Southwest 
Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas, or 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/code_of_federal_regulations/ibr_locations.html.

Joint Aircraft System/Component (JASC) Code

    (e) The JASC Code is 6210: Main Rotor Blades.
    (f) This amendment becomes effective on November 21, 2011.

    Issued in Fort Worth, Texas, on October 21, 2011.
Lance T. Gant,
Acting Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 2011-28355 Filed 11-3-11; 8:45 am]
BILLING CODE 4910-13-P


