FR Doc E8-25766

[Federal Register: November 14, 2008 (Volume 73, Number 221)]
[Rules and Regulations]
[Page 67372-67374]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr14no08-5]

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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2008-0854; Directorate Identifier 2008-CE-050-AD;
Amendment 39-15718; AD 2008-22-21]
RIN 2120-AA64

Airworthiness Directives; Allied Ag Cat Productions, Inc. Model
G-164 Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: The FAA adopts a new airworthiness directive (AD) to supersede
AD 78-08-09, which applies to certain Allied Ag Cat Productions, Inc.
(formerly Grumman-American) (Allied Ag Cat) Models G-164, G-164A, and
G-164B airplanes. AD 78-08-09 currently requires repetitively
inspecting the interior and the exterior of the main tubular spar of
the rudder assembly for corrosion, taking necessary corrective action
if corrosion is found, and applying corrosion protection. Since we
issued AD 78-08-09, the rudder main tubular spar failed on a later
production airplane. Consequently, this AD retains the actions required
in AD 78-08-09 and expands the applicability to include all G-164
series airplanes. We are issuing this AD to detect and correct
corrosion in the rudder main tubular spar, which could result in
failure of the weld to the main spar tube. This failure could lead to
loss of directional control.

DATES: This AD becomes effective on December 19, 2008.
On December 19, 2008, the Director of the Federal Register approved
the incorporation by reference of certain publications listed in this
AD.

ADDRESSES: To get the service information identified in this AD,
contact Allied Ag Cat Productions, Inc., 301 West Walnut Street, P.O.
Box 482, Walnut Ridge, Arkansas 72479; telephone: (870) 886-2418.
To view the AD docket, go to 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://www.regulations.gov. The docket number is FAA-2008-0854;
Directorate Identifier 2008-CE-050-AD.

FOR FURTHER INFORMATION CONTACT: Andy McAnaul, Aerospace Engineer,
10100 Reunion Pl., Ste. 650, San Antonio, Texas 78216; telephone: (210)
308-3365; fax: (210) 308-3370.

SUPPLEMENTARY INFORMATION:

Discussion

On August 1, 2008, 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 Allied Ag Cat Models G-164, G-164A, and G-164B
airplanes. This proposal was published in the Federal Register as a
notice of proposed rulemaking (NPRM) on August 7, 2008 (73 FR 45900).
The NPRM proposed to supersede AD 78-08-09 with a new AD that would
retain the actions required in AD 78-08-09 and expand the applicability
to include all G-164 series airplanes.

Comments

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

Comment Issue No. 1: AD Is Supported

Ronald I. Gustin, Craig T. Fountain, and Ken J. Kuther all state
that they support the AD action as proposed in the NPRM.
Ronald Gustin states that of the 13 Ag Cat airplanes inspected by
mechanics at Gustin Aviation, which was prompted by the NPRM, 4
airplanes had severe corrosion of the rudder main spar tube that
required repair; 2 airplanes had light rust; and 7 airplanes were
corrosion free. Craig T. Fountain and Ken J. Kuther, who collectively
own four of the airplanes inspected by Gustin Aviation, confirm the
reported corrosion found and also support the proposed AD action.
The commenters support the NPRM.
We are not changing the final rule AD action based on these
comments.

Comment Issue No. 2: Extend Comment Period

Bryan D. Hauschild states that he is planning to recover the rudder
on his airplane during the off-season, which is November through March.
He states that at that time he would be able to get a good look at the
area in question.
Mr. Hauschild requests to extend the comment period for the NPRM so
that his airplane is not pulled from its seasonal service at this time.
We do not agree with the commenter. We believe that the fleet
service history and severity of corrosion reported on Ag Cat rudders
requires AD action. Extending the comment period in order to delay the
effective date of this AD

[[Page 67373]]

would create an unacceptable safety risk.
We are not changing the final rule AD action based on this comment.

Conclusion

We have carefully reviewed the available data and determined that
air safety and the public interest require adopting the AD as proposed
except for minor editorial corrections. We have determined that these
minor corrections:
Are consistent with the intent that was proposed in the
NPRM for correcting the unsafe condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM.

Costs of Compliance

We estimate that this AD affects 2,700 airplanes in the U.S.
registry.
We estimate the following costs to do the inspections:

----------------------------------------------------------------------------------------------------------------
Total cost per Total cost on
Labor cost Parts cost airplane U.S. operators
----------------------------------------------------------------------------------------------------------------
4 work-hours x $80 per hour = $320........... Not applicable................. $320 $864,000
----------------------------------------------------------------------------------------------------------------

We have no way of determining the cost of repairs, parts
replacement, or the number of airplanes that may require repair or
parts replacement based on the result of the proposed inspections.

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 AD.

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 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 Flexibility Act.
We prepared a summary of the costs to comply with this AD (and
other information as included in the Regulatory Evaluation) and placed
it in the AD Docket. You may get a copy of this summary by sending a
request to us at the address listed under ADDRESSES. Include ``Docket
No. FAA-2008-0854; Directorate Identifier 2008-CE-050-AD'' in your
request.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.

Adoption of the Amendment

0
Accordingly, under 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. The FAA amends Sec. 39.13 by removing Airworthiness Directive (AD)
78-08-09, Amendment 39-3191, and adding the following new AD:

2008-22-21 Allied Ag Cat Productions, Inc.: Amendment 39-15718;
Docket No. FAA-2008-0854; Directorate Identifier 2008-CE-050-AD.

Effective Date

(a) This AD becomes effective on December 19, 2008.

Affected ADs

(b) This AD supersedes AD 78-08-09, Amendment 39-3191.

Applicability

------------------------------------------------------------------------
Models
-------------------------------------------------------------------------
G-164, G-164A, G-164B, G-164B with 73'' wing gap, G-164B-15T, G-164B-
34T, G-164B-20T, G-164C, G-164D, and G-164D with 73'' wing gap.
------------------------------------------------------------------------

Unsafe Condition

(d) This AD results from a report of the rudder main tubular
spar failing on a later production airplane. We are issuing this AD
to detect and correct corrosion in the rudder main tubular spar,
which could result in failure of the weld to the main spar tube.
This failure could lead to loss of directional control.

Compliance

(e) To address this problem, you must do the following, unless
already done:

------------------------------------------------------------------------
Actions Compliance Procedures
------------------------------------------------------------------------
(1) Drill an access hole and do (i) For airplanes Following Steps 1
a visual inspection using a previously through 3 of
borescope of the lower end affected by AD 78- Grumman American
internal cavity of the rudder 08-09: Initially Aviation
main spar tube for corrosion inspect within Corporation Ag-
and do a visual inspection of the next 60 Cat Service
the exterior of the rudder main months after the Bulletin No. 61,
spar tube for corrosion. last inspection dated June 6,
required in AD 78- 1977.
08-09 or within
the next 30 days
after December
19, 2008 (the
effective date of
this AD),
whichever occurs
later.
Repetitively
inspect
thereafter at
intervals not to
exceed 60
calendar months.

[[Page 67374]]

(ii) For airplanes ..................
not previously
affected by AD 78-
08-09: Initially
inspect within
the next 30 days
after the
effective date of
this AD.
Repetitively
inspect
thereafter at
intervals not to
exceed 60
calendar months.
(2) If corrosion is found during Before further As specified in
any inspection required in flight after any Steps 5 and 6 of
paragraph (e)(1) of this AD, inspection in Grumman American
repair in accordance with which corrosion Aviation
Advisory Circular 43.13-1B, Chg is found. Corporation Ag-
1, dated September 27, 2001, or Cat Service
replace the damaged part(s). Bulletin No. 61,
dated June 6,
1977, and
following
Advisory Circular
43.13-1B, Chg 1,
dated September
27, 2001, which
can be found at
http://
rgl.faa.gov/.
(3) After each inspection, Before further As specified in
repair, or replacement required flight after any Step 4 of Grumman
in this AD, corrosion protect inspection American Aviation
the spar tube internal cavity required in Corporation Ag-
by filling with warm, raw paragraph (e)(1) Cat Service
linseed oil, Paralketone, or of this AD and Bulletin No. 61,
CRC3 (LPS Heavy Duty Rust after any repair dated June 6,
Inhibitor Type 3), or suitable or replacement 1977.
equivalent protector for alloy required in
steel, and allow to drain. Seal paragraph (e)(2)
access hole with Scotch of this AD.
caulking compound, a suitable
silicone based sealant, or
equivalent.
(4) Verify rigging check of the Before further (i) Following Ag-
rudder. flight after any Cat Maintenance
inspection Manual pages 6-14
required in through 6-16,
paragraph (e)(1) copyright 1978;
of this AD and or
after any repair (ii) Following Ag-
or replacement Cat G-164D
required in Maintenance
paragraph (e)(2) Manual pages 6-24
of this AD. and 6-29,
copyright 1995.
(5) Only install a rudder that As of the next 30 Not applicable.
has been inspected as specified days after
in paragraph (e)(1) of this AD, December 19, 2008
is free of corrosion, and has (the effective
had the corrosion protection date of this AD).
applied and sealed as specified
in paragraph (e)(3) of this AD.
------------------------------------------------------------------------

Alternative Methods of Compliance (AMOCs)

(f) The Manager, Fort Worth Airplane Certification Office, 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: Andy
McAnaul, Aerospace Engineer, ASW-150, FAA San Antonio MIDO-43, 10100
Reunion Place, Suite 650, San Antonio, Texas 78216, phone: (210)
308-3365; fax: (210) 308-3370. 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.
(g) AMOCs approved for AD 78-08-09 are not approved for this AD.

Material Incorporated by Reference

(h) You must use Grumman American Aviation Corporation Ag-Cat
Service Bulletin No. 61, dated June 6, 1977, and Ag-Cat Maintenance
Manual pages 6-14 through 6-16, copyright 1978; or Ag-Cat G-164D
Maintenance Manual pages 6-24 and 6-29, copyright 1995, to do the
actions required by this AD, unless the AD specifies otherwise.
(1) The Director of the Federal Register approved the
incorporation by reference of this service information under 5
U.S.C. 552(a) and 1 CFR part 51.
(2) For service information identified in this AD, contact
Allied Ag Cat Productions, Inc., 301 West Walnut Street, P.O. Box
482, Walnut Ridge, Arkansas 72479; telephone: (870) 886-2418.
(3) You may review copies at the FAA, Central Region, Office of
the Regional Counsel, 901 Locust, Kansas City, Missouri 64106; 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.

Issued in Kansas City, Missouri, on October 23, 2008.
John Colomy,
Acting, Small Airplane Directorate, Aircraft Certification Service.
[FR Doc. E8-25766 Filed 11-13-08; 8:45 am]

BILLING CODE 4910-13-P