[Federal Register Volume 74, Number 232 (Friday, December 4, 2009)]
[Rules and Regulations]
[Pages 63563-63565]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E9-28863]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2009-1130; Directorate Identifier 2009-SW-40-AD;
Amendment 39-16130; AD 2009-25-10]
RIN 2120-AA64
Airworthiness Directives; Sikorsky Aircraft Corporation
(Sikorsky) Model S-92A Helicopters
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule; request for comments.
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SUMMARY: This amendment adopts a new airworthiness directive (AD) for
the Sikorsky Model S-92A helicopters. This action requires a one-time
visual inspection of the main gearbox (MGB) lube system filter assembly
for oil filter damage. This action also requires if either the primary
or secondary oil filter is damaged, replacing both filters, all
packings, and the studs before further flight. This AD also requires
replacing the oil filter bowl within 30 days after replacing a damaged
filter and a daily leak inspection for an oil leak (no oil leaks
allowed) during that 30-day interim period. This amendment is prompted
by three reports of damaged oil filters or packings resulting from
installing the filter assembly with an oversized packing possibly
because of incorrect part numbers in the maintenance manual. Based on a
previous accident investigation, failure of the oil filter bowl or
mounting studs can result in sudden and complete loss of oil from the
MGB. The actions specified in this AD are intended to prevent complete
loss of oil from the MGB, failure of the MGB, and subsequent loss of
control of the helicopter.
DATES: Effective December 21, 2009.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of December 21, 2009.
Comments for inclusion in the Rules Docket must be received on or
before February 2, 2010.
ADDRESSES: Use one of the following addresses to submit comments 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-
[[Page 63564]]
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
Sikorsky Aircraft Corporation, Attn: Manager, Commercial Technical
Support, mailstop s581a, 6900 Main Street, Stratford, CT, telephone
(203) 383-4866, e-mail address [email protected], or at http://www.sikorsky.com.
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: Kirk Gustafson, Aviation Safety
Engineer, Boston Aircraft Certification Office, Engine and Propeller
Directorate, FAA, 12 New England Executive Park, Burlington, MA 01803,
telephone (781) 238-7190, fax (781) 238-7170.
SUPPLEMENTARY INFORMATION: This amendment adopts a new AD for the
Sikorsky Model S-92A helicopters. This action requires a one-time
visual inspection of the MGB lube system filter assembly for oil filter
damage. This action also requires if either the primary or secondary
oil filter is damaged, replacing both filters, all packings, and the
studs before further flight. This action also requires replacing the
oil filter bowl within 30 days after replacing a damaged filter and a
daily inspection for an oil leak (no oil leaks allowed) during that 30-
day interim period. This amendment is prompted by three reports of
damaged oil filters or packings resulting from operating with an
oversized packing possibly because of incorrect part numbers in the
maintenance manual. Sikorsky has issued a temporary revision, T-Rev 63-
19, to the maintenance manual to correct any errors. Installing the
filter assembly with an oversized packing (also known as an O-ring) in
the oil filter double bypass valve can produce excessive assembly and
fatigue loads in the oil filter bowl or the mounting studs that secure
the oil filter bowl to the MGB. Based on rig testing, these conditions
can result in reduced fatigue life in the studs and the oil filter
bowl. Based on information from a previous accident investigation,
failure of the oil filter bowl or mounting studs can result in sudden
and complete loss of oil from the MGB. This condition, if not
corrected, could result in complete loss of oil from the MGB, failure
of the MGB, and subsequent loss of control of the helicopter.
We have reviewed Sikorsky Alert Service Bulletin (ASB) No. 92-63-
018, dated July 1, 2009, and No. 92-63-019, dated July 14, 2009. ASB
No. 92-63-018 specifies a one-time visual inspection for a damaged oil
filter element. ASB No. 92-63-019 specifies replacing the MGB filter
bowl on those helicopters that have previously been found to have a
damaged MGB oil filter. ASB No. 92-63-019 also requires a daily visual
inspection of the MGB lube system filter assembly for oil leaks (no
leaks allowed) until the oil filter bowl is replaced.
This unsafe condition is likely to exist or develop on other
helicopters of the same type design. Therefore, this AD is being issued
to prevent complete loss of oil from the MGB, failure of the MGB, and
subsequent loss of control of the helicopter. This AD requires visually
inspecting the oil filter for damage and replacing any filter,
packings, and mounting studs before further flight if the filter is
damaged. The AD also requires replacing the oil filter bowl within 30
days after a damaged filter has been replaced. Do the actions by
following specified portions of the service bulletin described
previously.
The short compliance time involved is required because the
previously described critical unsafe condition can adversely affect the
controllability or structural integrity of the helicopter. Therefore, a
one-time visual inspection of the oil filter within 7 days is required.
If the visual inspection finds a damaged filter, replacing the damaged
filter, packings, and filter bowl mounting studs before further flight
are also required. Also, a one-time replacement of the oil filter bowl
is required within 30 days after replacing a damaged oil filter. All of
these are very short compliance times. Therefore, this AD must be
issued immediately.
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 44 helicopters. Assuming a
one-time inspection shows no damage to 39 of the helicopters, it will
take about 1.5 work hours to remove, inspect, and reinstall each oil
filter assembly and packing for 39 helicopters. Assuming oil filter
damage is discovered in 5 helicopters, the additional required actions
will take about:
1.5 work hours to remove, inspect, and reinstall each
filter assembly and packing, and
3 work hours to replace the mounting studs.
Assuming the bowl replacement is deferred on all 5 helicopters for 30
days, it will take about:
15 work hours for 30 daily (.5 work hour each) inspections
for leakage, and
1 work hour to replace the oil filter bowl.
The average labor rate is $80 per work hour. Required parts will cost
about $817 for the oil filter assembly, $81 for the filter bowl
mounting studs, and $4,568 for the filter bowl per helicopter. Based on
these figures, we estimate the total cost impact of the AD on U.S.
operators to be $40,210.
Comments Invited
This AD is a final rule that involves requirements that affect
flight safety and was not preceded by notice and an opportunity for
public comment; however, we invite you to submit any written data,
views, or arguments regarding this AD. Send your comments to an address
listed under ADDRESSES. Include ``Docket No. FAA-2009-1130; Directorate
Identifier 2009-SW-40-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
with FAA personnel concerning this AD. Using the search function of our
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
[[Page 63565]]
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
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 adding a new airworthiness directive to
read as follows:
2009-25-10 Sikorsky Aircraft Corp.: Amendment 39-16130. Docket No.
FAA-2009-1130; Directorate Identifier 2009-SW-40-AD.
Applicability: Model S-92A helicopters, serial numbers 920006
through 920109, certificated in any category.
Compliance: Required as indicated, unless done previously.
To prevent complete loss of oil from the main gearbox (MGB),
failure of the MGB, and subsequent loss of control of the
helicopter, do the following:
(a) Within 7 days, inspect the MGB lube system filter assembly
for damage to the primary and secondary oil filters by following the
Accomplishment Instructions, paragraphs 3.A.(4) and through 3.A.(6)
of Sikorsky Alert Service Bulletin (ASB) No. 92-63-018, dated July
1, 2009 (ASB No. 92-63-018). For purposes of this AD, ``damage'' is
the presence of those conditions described in paragraphs 3.A.(5) and
3.A.(8) of the Accomplishment Instructions of ASB No. 92-63-018.
(b) If you find damage in the primary oil filter element (part
number (P/N) 70351-38801-102) as follows: ``wavy pleats'' as
depicted in Figure 1, internal buckling or a crack as depicted in
Figure 2, or indented dimples as depicted in Figure 3 of ASB No. 92-
63-018 or damage in the secondary oil filter element (P/N 70351-
38801-103) as follows: ``wavy pleats'' as depicted in Figure 4 or an
elongated cup as depicted in Figure 5 of ASB No. 92-63-018, replace
both the primary and secondary filters, packings, and filter bowl
mounting studs, service the transmission and perform a functional
test before further flight by following the Accomplishment
Instructions, paragraphs 3.C.(1) through 3.C.(23), of ASB No. 92-63-
018, except this AD does not require you to return removed studs to
HSI nor does it require you to contact the manufacturer. If you find
damage in the tapped holes or in the MGB housing lockring
counterbore, contact the Boston Aircraft Certification Office for an
approved repair.
(c) If you find no damage in the primary or secondary oil filter
element, before further flight, replace the packings, service the
transmission, and perform a functional test by following the
Accomplishment Instructions, paragraphs 3.B.(1) through 3.B.(4) of
ASB No. 92-63-018.
(d) For those helicopters on which the primary or secondary oil
filter element and filter bowl mounting studs were replaced as
required by paragraph (b) of this AD:
(1) Before the first flight of each day until the oil filter
bowl, P/N AAC367-16D2A, is replaced, inspect the MGB lube system
filter assembly for any oil leak.
(2) Before further flight after any oil leak is detected as
required by paragraph (d)(1) of this AD or within 30 days, whichever
is earlier, replace the oil filter bowl.
Note: Sikorsky ASB No. 92-63-019, dated July 1, 2009, pertains
to the subject of this AD.
(e) 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, Boston Aircraft Certification Office, FAA,
ATTN: Kirk Gustafson, Aviation Safety Engineer, Engine and Propeller
Directorate, FAA, 12 New England Executive Park, Burlington, MA
01803, telephone (781) 238-7190, fax (781) 238-7170, for information
about previously approved alternative methods of compliance.
(f) The Joint Aircraft System/Component (JASC) Code is 6300:
Main Rotor System.
(g) Inspecting and replacing the main gearbox lube system
assembly parts shall be done by following the specified portions of
Sikorsky Alert Service Bulletin (ASB) No. 92-63-018, dated July 1,
2009. The Director of the Federal Register approved this
incorporation by reference under 5 U.S.C. 552(a) and 1 CFR part 51.
Copies may be obtained from Sikorsky Aircraft Corporation, Attn:
Manager, Commercial Technical Support, mailstop s581a, 6900 Main
Street, Stratford, CT, telephone (203) 383-4866, e-mail address
[email protected], or at http://www.sikorsky.com. 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.
(h) This amendment becomes effective on December 21, 2009.
Issued in Fort Worth, Texas, on November 25, 2009.
Lance T. Gant,
Acting Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. E9-28863 Filed 12-3-09; 8:45 am]
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