FR Doc E8-6786

[Federal Register: April 2, 2008 (Volume 73, Number 64)]
[Proposed Rules]
[Page 17935-17936]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr02ap08-17]

=======================================================================
-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-28245; Directorate Identifier 2007-CE-047-AD]
RIN 2120-AA64

Airworthiness Directives; Cirrus Design Corporation Models SR20
and SR22 Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Supplemental notice of proposed rulemaking (NPRM); Reopening of
the comment period.

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

SUMMARY: We are revising an earlier proposed airworthiness directive
(AD) that applies to certain Cirrus Design Corporation (CDC) Models
SR20 and SR22 airplanes. The earlier NPRM would have required you to
replace the cabin door rod ends at the upper and lower hinges of the
cabin door with newly designed rod ends. The earlier NPRM resulted from
two known occurrences of in-flight cabin door separation (one total
separation and one retained by the door strut). This proposed AD would
require you to replace the cabin door rod ends with new parts including
a redesigned non-binding hinge pin that replaces the existing pin at
the upper door hinge. Since these actions impose an additional burden
over that proposed in the NPRM, we are reopening the comment period to
allow the public the chance to comment on these additional actions.

DATES: We must receive comments on this proposed AD by June 2, 2008.

ADDRESSES: Use one of the following addresses to comment on this
proposed 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.
For service information identified in this proposed AD, contact
Cirrus Design Corporation, 4515 Taylor Circle, Duluth, Minnesota 55811;
telephone: (218) 727-2737; Internet address: http://
www.cirrusdesign.com.

FOR FURTHER INFORMATION CONTACT: Wess Rouse, Aerospace Engineer,
Chicago Aircraft Certification Office, 2300 East Devon Avenue, Room
107, Des Plaines, Illinois 60018; telephone: (847) 294-8113; fax: (847)
294-7834.

SUPPLEMENTARY INFORMATION:

Comments Invited

We invite you to send any written relevant data, views, or
arguments regarding this proposed AD. Send your comments to an address
listed under the ADDRESSES section. Include the docket number, ``FAA-
2007-28245; Directorate Identifier 2007-CE-047-AD'' at the beginning of
your comments. We specifically invite comments on the overall
regulatory, economic, environmental, and energy aspects of the proposed
AD. We will consider all comments received by the closing date and may
amend the proposed 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 proposed AD.

Discussion

On June 6, 2007, we issued a proposal to amend part 39 of the
Federal Aviation Regulations (14 CFR part 39) to include an AD that
would apply to certain CDC Models SR20 and SR22 airplanes. This
proposal was published in the Federal Register as a notice of proposed
rulemaking (NPRM) on June 13, 2007 (72 FR 32563). The NPRM proposed to
require you to replace the cabin door rod ends at the upper and lower
hinges of the cabin door with newly designed rod ends.

Comments

We provided the public the opportunity to participate in developing
this AD. The following presents the comment received on the proposal
and FAA's response to the comment:

Comment Issue: Revised Service Bulletin

We received a comment from CDC stating that CDC will soon release
Service Bulletin (SB) SB 2X-52-07 R2 listed in the NPRM and requested
the AD require accomplishment of that version.
The FAA partially agrees. The latest revision to the service
bulletin should be used for AD accomplishment; however, SB 2X-52-07 R2
had an incorrectly written compliance paragraph that required SB 2X-52-
07 R3. SB 2X-52-07 R3 was issued on September 24, 2007, but because of
further changes necessary to insure proper door operation without
binding, SB 2X-52-07 R4 was issued on January 24, 2008. We will change
the proposed AD to require following the procedures in Service Bulletin
SB 2X-52-07 R4, dated January 24, 2008.

FAA's Determination and Requirements of This Proposed AD

We have carefully reviewed the available data and determined that
the unsafe condition referenced in this document exists or could
develop on other products of the same type design; and we should take
AD action to correct this unsafe condition.
Certain changes described above expand the scope of the earlier
NPRM. As a result, we have determined that it is necessary to reopen
the comment period to provide additional opportunity for the public to
comment on the proposed AD.

The Supplemental NPRM

Since we issued the earlier NPRM, CDC issued Service Bulletin SB
2X-52-07 R4, dated January 24, 2008, which includes changes to assure
proper door operation without binding.
Proposing new parts including a redesigned non-binding hinge pin
that replaces the existing bolt at the upper door hinge and a
castellated nut for the upper end of the hinge pin to improve security
of attaching parts goes beyond the scope of what was originally
proposed in the NPRM. Therefore, we are reopening the comment period
and allowing the public the chance to comment on these additional
actions.

[[Page 17936]]

Costs of Compliance

We estimate that the proposed AD affects 2,308 airplanes in the
U.S. registry.
The costs vary from 3.5 work-hours to incorporate Cirrus Kit 70186-
004 and 2.5 work-hours to incorporate Cirrus Kit 70186-005. Parts cost
for either kit is $270. For the purposes of the proposed AD, we will
use 3.5 work-hours for all airplanes. Based on this, the cost of the
proposed AD is:

----------------------------------------------------------------------------------------------------------------
Total cost per Total fleet
Labor cost Parts cost airplane cost
----------------------------------------------------------------------------------------------------------------
3.5 work-hours x $80 per hour = $280......................... $270 $550 $1,269,400
----------------------------------------------------------------------------------------------------------------

Note: CDC will provide warranty credit to the extent noted in
CDC Service Bulletin 2X-52-07 R4, dated January 24, 2008.

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

We have determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would 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 proposed
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 a regulatory evaluation of the estimated costs to
comply with this proposed AD and placed it in the AD docket.

Examining the AD Docket

You may examine the AD docket that contains the proposed AD, the
regulatory evaluation, any comments received, and other information on
the Internet at http://dms.dot.gov; or in person at the Docket
Management Facility between 9 a.m. and 5 p.m., Monday through Friday,
except Federal holidays. The Docket Office (telephone (800) 647-5527)
is located at the street address stated 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, Safety.

The Proposed Amendment

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

PART 39--AIRWORTHINESS DIRECTIVES

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]

2. The FAA amends Sec. 39.13 by adding the following new AD:

Cirrus Design Corporation: Docket No. FAA-2007-28245; Directorate
Identifier 2007-CE-047-AD.

Comments Due Date

(a) We must receive comments on this airworthiness directive
(AD) action by June 2, 2008.

Affected ADs

(b) None.

Applicability

------------------------------------------------------------------------
Models Serial Nos.
------------------------------------------------------------------------
SR20.............................. 1423 through 1906.
SR22.............................. 0795 and 0820 through 2912.
------------------------------------------------------------------------

Unsafe Condition

(d) This AD results from two known occurrences of in-flight
cabin door separation (one total separation and one retained by the
door strut). We are proposing this AD to prevent in-flight failure
of the cabin door, which could result in door separation from the
airplane.

Compliance

(e) To address this problem, you must do the following, unless
already done:
Within the next 50 hours time-in-service (TIS) after the
effective date of this AD or within 180 days after the effective
date of this AD, whichever occurs first, following Cirrus Design
Corporation Service Bulletin SB 2X-52-07 R4, dated January 24, 2008:
(1) If threaded sleeve is installed at the cabin door rod end,
install cabin door rod end Kit 70186-004.
(2) If threaded sleeve is not installed at the cabin door rod
end, install cabin door rod end Kit 70186-005.

Alternative Methods of Compliance (AMOCs)

(f) The Manager, Chicago Aircraft Certification Office (ACO),
FAA, has the authority to approve AMOCs for this AD, if requested
using the procedures found in 14 CFR 39.19. Send information to
ATTN: Wess Rouse, Aerospace Engineer, Chicago ACO, 2300 East Devon
Avenue, Room 107, Des Plaines, Illinois 60018; telephone: (847) 294-
8113; fax: (847) 294-7834. Before using any approved AMOC on any
airplane to which the AMOC applies, notify your appropriate
principal inspector (PI) in the FAA Flight Standards District Office
(FSDO), or lacking a PI, your local FSDO.

Related Information

(g) To get copies of the service information referenced in this
AD, contact Cirrus Design Corporation, 4515 Taylor Circle, Duluth,
Minnesota 55811, telephone: (218) 788-3000. To view the AD docket,
go to the U.S. Department of Transportation, Docket Operations, M-
30, West Building Ground Floor, Room W12-140, 1200 New Jersey
Avenue, SE., Washington, DC 20590, or on the Internet at http://
dms.dot.gov. The docket number is Docket No. FAA-2007-28245;
Directorate Identifier 2007-CE-047-AD.

Issued in Kansas City, Missouri, on March 26, 2008.
John Colomy,
Acting Manager, Small Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E8-6786 Filed 4-1-08; 8:45 am]

BILLING CODE 4910-13-P