Airworthiness Directives; Bell Helicopter Textron Canada Model 206L, 206L-1, and 206L-3 Helicopters

[Federal Register Volume 75, Number 220 (Tuesday, November 16, 2010)]
[Rules and Regulations]
[Pages 69860-69861]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-28470]



[[Page 69860]]

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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2008-1242; Directorate Identifier 96-SW-13-AD; 
Amendment 39-16511; AD 96-18-05 R1]
RIN 2120-AA64


Airworthiness Directives; Bell Helicopter Textron Canada Model 
206L, 206L-1, and 206L-3 Helicopters

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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

SUMMARY: This amendment revises an existing airworthiness directive 
(AD) for Bell Helicopter Textron Canada (BHTC) Model 206L, 206L-1, and 
206L-3 helicopters with a certain part numbered tailboom installed, 
that currently requires a visual inspection of the tailboom skin in the 
areas around the nutplates and in the areas of the tailboom drive shaft 
cover retention clips for cracks and corrosion using a 10-power or 
higher magnifying glass until the tailboom is replaced with an 
airworthy tailboom. This action requires the same actions as the 
existing AD, but allows a longer interval for the repetitive 
inspections if the tailboom is modified to increase its structural 
integrity. Replacement with an airworthy tailboom other than a part-
numbered tailboom affected by this amendment constitutes a terminating 
action for the requirements of this AD. This amendment is prompted by 
an accident and several reports of fatigue cracks in the tailboom skin 
in the areas around the nutplates for the tail rotor fairing and in the 
areas of the tail rotor drive shaft cover retention clips. The actions 
required by this AD are intended to prevent failure of the tailboom and 
subsequent loss of control of the helicopter.

DATES: Effective December 21, 2010.
    As of September 16, 1996 (61 FR 45876, August 30, 1996), the 
Director of the Federal Register approved the incorporation by 
reference of Bell Helicopter Textron Inc. Alert Service Bulletin 206L-
87-47, Revision C, dated October 23, 1989, listed in this AD.

ADDRESSES: You may get the service information identified in this AD 
from Bell Helicopter Textron Canada, 12,800 Rue de l'Avenir, Mirabel, 
Quebec J7J1R4, telephone (450) 437-2862 or (800) 363-8023, fax (450) 
433-0272, or at http://www.bellcustomer.com/files/.
    Examining the Docket: You may examine the docket that contains this 
AD, any comments, and other information on the Internet at http://www.regulations.gov, or at the Docket Operations office, West Building 
Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, 
DC.

FOR FURTHER INFORMATION CONTACT: DOT/FAA Southwest Region, Sharon 
Miles, ASW-111, Aviation Safety Engineer, Rotorcraft Directorate, 
Regulations and Policy Group, 2601 Meacham Blvd., Fort Worth, Texas 
76137, telephone (817) 222-5122, fax (817) 222-5961.

SUPPLEMENTARY INFORMATION: A proposal to amend 14 CFR part 39 by 
revising AD 96-18-05, Amendment 39-9729 (61 FR 45876, August 30, 1996), 
for the specified BHTC Model 206L, 206L-1, and 206L-3 helicopters, with 
tailboom, part number (P/N) 206-033-004-003, -011, -045, or -103, 
installed, was published in the Federal Register on November 26, 2008 
(73 FR 71955). The action proposed to require before further flight, 
unless accomplished previously, a visual inspection of the tailboom 
skin for cracks and corrosion in the areas around the nutplates for the 
tail rotor fairing and in the areas of the tailboom drive shaft cover 
retention clips using a 10-power or higher magnifying glass. The action 
also proposed to require the inspections repetitively at intervals not 
to exceed 100 hours time-in-service (TIS) for helicopters that have 
been modified to increase the structural integrity of the tailboom in 
accordance with Bell Helicopter Textron Alert Service Bulletin No. 
206L-87-47, Revision C, dated October 23, 1989 (ASB). For helicopters 
that have not been modified in accordance with the ASB, we proposed to 
require repetitive inspections at intervals not to exceed 50-hours TIS. 
That action also proposed a terminating action for the repetitive 
inspection requirements by replacing an affected tailboom with an 
airworthy tailboom, P/N 206-033-004-143 or -177. That action was 
prompted by an accident and several reports of fatigue cracks in the 
tailboom skin in the areas around the nutplates for the tail rotor 
fairing, and in the areas of the tail rotor drive shaft cover retention 
clips.
    Transport Canada, the airworthiness authority for Canada, notified 
the FAA that an unsafe condition may exist on BHTC Model 206L, 206L-1, 
and 206L-3 helicopters. Transport Canada advises that there has been 
one accident and several reports of fatigue cracks in the tailboom skin 
in the areas around the nutplates for the tail rotor fairing, and in 
the areas of the tail rotor drive shaft cover retention clips.
    This helicopter model is manufactured in Canada and is type 
certificated for operation in the United States under the provisions of 
14 CFR 21.29 and the applicable bilateral agreement. When AD 96-18-05 
was issued, the type certificate for these affected model helicopters 
was in the U.S. and the FAA had oversight responsibility for these 
model helicopters. Transport Canada issued an AD following the FAA AD, 
except that Transport Canada required modifying the tailboom in 
accordance with the ASB and increasing the inspection interval to 100 
hours TIS. Subsequently, these type certificates were transferred to 
Canada.
    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. No comments were received on the 
proposal or the FAA's determination of the cost to the public. The FAA 
has determined that air safety and the public interest require the 
adoption of the rule as proposed with only minor, non-substantive 
changes.
    We estimate that this AD will affect 551 helicopters of U.S. 
registry. We also estimate that it will take about 0.8 work hour to 
inspect and 8 work hours per helicopter to modify a helicopter, at an 
average labor rate of $85 per work hour. If a helicopter is modified to 
increase the inspection intervals, required parts will cost 
approximately $385. Based on these figures, we estimate the total cost 
impact of the AD on U.S. operators to be $423,168 per year, assuming 
all the helicopters are unmodified and twelve 50-hour TIS inspections 
per helicopter. If we assume that all helicopters are modified at the 
beginning of the year, the cost impact of the AD on U.S. operators will 
be $776,359 for the first year, assuming there are six 100-hour TIS 
inspections the first year, and $211,584 for each year thereafter.

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); and

[[Page 69861]]

    3. 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

0
Accordingly, pursuant to the authority delegated to me by the 
Administrator, the Federal Aviation Administration amends part 39 of 
the Federal Aviation Regulations (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. Section 39.13 is amended by removing Amendment 39-9729 (61 FR 45876, 
August 30, 1996), and by adding a new airworthiness directive (AD), to 
read as follows:

96-18-05 R1 Bell Helicopter Textron Canada: Amendment 39-16511. 
Docket No. FAA-2008-1242; Directorate Identifier 96-SW-13-AD. 
Revises AD 96-18-05, Amendment 39-9729.

    Applicability: Model 206L, 206L-1, and 206L-3 helicopters, with 
tailboom, part number (P/N) 206-033-004-003, -011, -45, -045, or -
103, installed, certificated in any category.
    Compliance: Required as indicated.
    To prevent failure of the tailboom and subsequent loss of 
control of the helicopter, accomplish the following:
    (a) Before further flight, unless accomplished previously, using 
a 10-power or higher magnifying glass, inspect the tailboom for 
cracks or corrosion in accordance with the Accomplishment 
Instructions, Part II, steps (1) through (7), of Bell Helicopter 
Textron Alert Service Bulletin No. 206L-87-47, Revision C, dated 
October 23, 1989 (ASB).
    (b) For a tailboom that has not been modified in accordance with 
the Accomplishment Instructions, Part I of the ASB, using a 10-power 
or higher magnifying glass, inspect the tailboom for a crack at 
intervals not to exceed 50 hours time-in-service (TIS) in accordance 
with the Accomplishment Instructions, Part II, steps (1) through 
(7), of the ASB.
    (c) For a tailboom that has been modified in accordance with the 
Accomplishment Instructions, Part I of the ASB, using a 10-power or 
higher magnifying glass, inspect the tailboom for a crack or 
corrosion at intervals not to exceed 100 hours TIS in accordance 
with the Accomplishment Instructions, Part II and Part III of the 
ASB, except you are not required to contact the manufacturer.
    (d) If a crack or corrosion is detected that is beyond the 
repairable limits stated in the applicable maintenance manual, 
remove the tailboom and replace it with an airworthy tailboom.
    (e) Replacing the tailboom with a tailboom, P/N 206-033-004-143 
or -177, or an airworthy part-numbered tailboom that is not listed 
in the Applicability section of this AD, constitutes a terminating 
action for the requirements of this AD.
    (f) 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, Safety Management Group, FAA, ATTN: DOT/FAA 
Southwest Region, Sharon Miles, Aviation Safety Engineer, ASW-111, 
Rotorcraft Directorate, Regulations and Policy Group, 2601 Meacham 
Blvd., Fort Worth, Texas 76137, telephone (817) 222-5122, fax (817) 
222-5961, for information about previously approved alternative 
methods of compliance.
    (g) Special flight permits will not be issued.
    (h) You must use Bell Helicopter Textron Inc. Alert Service 
Bulletin 206L-87-47, Revision C, dated October 23, 1989, to do the 
actions required by this AD, unless the AD specifies otherwise.
    (1) On September 16, 1996 (61 FR 45876, August 30, 1996), the 
Director of the Federal Register previously approved the 
incorporation by reference of Bell Helicopter Textron Inc. Alert 
Service Bulletin 206L-87-47, Revision C, dated October 23, 1989.
    (2) For service information identified in this AD, contact Bell 
Helicopter Textron Canada, 12,800 Rue de l'Avenir, Mirabel, Quebec 
J7J1R4, telephone (450) 437-2862 or (800) 363-8023, fax (450) 433-
0272, or at http://www.bellcustomer.com/files/.
    (3) You may review copies of the service information 
incorporated by reference for this AD at the FAA, Office of the 
Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, 
Fort Worth, Texas.
    (4) You may also review copies of the service information 
incorporated by reference for this AD 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.
    (i) This amendment becomes effective on December 21, 2010.

    Issued in Fort Worth, Texas, on October 26, 2010.
Lance T. Gant,
Acting Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 2010-28470 Filed 11-15-10; 8:45 am]
BILLING CODE 4910-13-P

The complete text was extracted from the official GovInfo HTML edition for this publication. Acquired 2026-10-09T03:12:17.109425+00:00. Text extraction preserves the recorded source wording; it does not determine current requirements.

Open the captured official edition

Source SHA-256

a5b77b6870b1684d54c7d8fd80a8308db63e613e5e37844a0349cc9553c9afdc

Text SHA-256

cabb10a433d1cfe31b087f5288d292f77db74bb0d63eafe1310cef41fc412e48