Federal Register, Volume 75, Number 98, May 21, 2010, Pages 28463-28750 Page: 28,481
The following text was automatically extracted from the image on this page using optical character recognition software:
Federal Register/Vol. 75, No. 98/Friday, May 21, 2010/Rules and Regulations
valves P/N 2S2794-1 installed. The
investigations carried out on those check
valves have shown that a spring, mounted
inside the valve, does not meet the Airbus
type design specifications.
This situation, if not corrected, can cause
hydraulic system functional degradation,
possibly resulting in reduced control of the
aeroplane when combined with an air duct
leak, air conditioning system contamination
or, if installed, malfunction of the fire
extinguishing system in the Class 'C' cargo
For the reasons described above, EASA
[European Aviation Safety Agency] AD 2008-
0166 was issued to require the inspection of
the Crissair check valves P/N 2S2794-1, to
identify serial numbers (s/n) and the
replacement of the affected ones with
Later on, further investigation by the
vendor Crissair revealed more suspect check
valves P/N 2S2794-1. Based on this, it was
concluded that EASA AD 2008- 0166 did not
adequately address the unsafe condition and
also did not correctly identify the Functional
Item Numbers (FIN) of the various aeroplane
installations of the affected valves.
Consequently, EASA AD Cancellation Notice
No.: 2008-0166-CN was issued on 29
October 2008 to cancel EASA AD 2008-0166.
An updated list of suspect check valves
with P/N 2S2794-1 has now been issued by
Crissair Inc., the manufacturer.
Consequently, this EASA AD requires the
identification of the check valves by s/n and
the replacement of the affected ones with
You may obtain further information by
examining the MCAI in the AD docket.
We gave the public the opportunity to
participate in developing this AD. We
received no comments on the NPRM or
on the determination of the cost to the
We reviewed the available data and
determined that air safety and the
public interest require adopting the AD
Differences Between This AD and the
MCAI or Service Information
We have reviewed the MCAI and
related service information and, in
general, agree with their substance. But
we might have found it necessary to use
different words from those in the MCAI
to ensure the AD is clear for U.S.
operators and is enforceable. In making
these changes, we do not intend to differ
substantively from the information
provided in the MCAI and related
We might also have required different
actions in this AD from those in the
MCAI in order to follow our FAA
policies. Any such differences are
highlighted in a NOTE within the AD.
Costs of Compliance
We estimate that this AD will affect
206 products of U.S. registry. We also
estimate that it will take about 12 work-
hours per product to comply with the
basic requirements of this AD. The
average labor rate is $85 per work-hour.
Based on these figures, we estimate the
cost of this AD to the U.S. operators to
be $210,120, or $1,020 per product.
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
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
We 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 this AD:
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
We prepared a regulatory evaluation
of the estimated costs to comply with
this AD and placed it in the AD docket.
Examining the AD Docket
You may examine the AD docket 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 AD docket
contains the NPRM, the regulatory
evaluation, any comments received, and
other information. The street address for
the Docket Operations office (telephone
(800) 647-5527) is in the ADDRESSES
section. Comments will be available in
the AD docket shortly after receipt.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Incorporation by reference,
Adoption of the Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA amends 14 CFR part 39 as
a 1. The authority citation for part 39
continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
S2. The FAA amends 39.13 by adding
the following new AD:
2010-11-03 Airbus: Amendment 39-16308.
Docket No. FAA-2010-0172; Directorate
(a) This airworthiness directive (AD)
becomes effective June 25, 2010.
(c) This AD applies to Airbus Model A300
B2-1A, B2-1C, B2K-3C, B2-203, B4-2C, B4-
103, B4-203, B4-601, B4- 603, B4-620, B4
622, B4-605R, B4-622R, F4-605R, F4-622R,
and C4-605R Variant F airplanes; and Model
A310-203, -204, -221, -222, -304, -322,
-324, and -325 airplanes; certificated in any
category, all certified models and all serial
numbers on which any Crissair check valve
part number 2S2794-1 is installed.
(d) Air Transport Association (ATA) of
America Code 29: Hydraulic Power; and 26:
(e) The mandatory continuing
airworthiness information (MCAI) states:
In the past, some operators have reported
difficulties to pressurise the hydraulic
reservoirs, due to leakage of the Crissair
reservoir air pressurization check valves. In
some cases, the air conditioning system was
contaminated with hydraulic mist. The
leakage of the check valves was caused by an
incorrect spring material. The affected
Crissair check valves Part Number (P/N)
2S2794 were then replaced with improved
check valves P/N 2S2794-1 in accordance
with Airbus Service Information Letter 29-
Here’s what’s next.
This issue can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Periodical.
United States. Office of the Federal Register. Federal Register, Volume 75, Number 98, May 21, 2010, Pages 28463-28750, periodical, May 21, 2010; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc52679/m1/27/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.