EFFECTIVE DATE
(a) This airworthiness directive (AD) becomes effective October 7, 2010.
AFFECTED ADS
(b) This AD revises AD 2010-10-01, Amendment 39-16280.
APPLICABILITY
(c) This AD applies to the following model and serial number airplanes,
certificated in any category:
(i) Group 1 Airplanes (retains the actions and applicability from AD
2009-05-01): Model GA8 airplanes, serial numbers GA8-00-004 and up;
and
(ii) Group 2 Airplanes: Model GA8-TC320 airplanes, all serial numbers.
SUBJECT
(d) Air Transport Association of America (ATA) Code 55: Stabilizers.
REASON
(e) The mandatory continuing airworthiness information (MCAI) states:
Inspection of a high time aircraft has revealed cracks in the
Horizontal Stabiliser rear spar splice plate and inboard main ribs
around the area of the Horizontal Stabiliser rear pivot attachment.
Additionally, failure of some attach bolts in service may be due to
improper assembly.
This amendment is issued to include an applicability matrix (Table 1,
page 2) in the compliance section of the service bulletin for improved
clarity.
The previous amendment included reference to the GA8-TC 320 variant in
the applicability section.
Amendment 2 was issued because the requirement document now contains
an inspection for cracking in horizontal stabilisers which have load
transferring fittings installed.
Previous amendments of this AD listed the AD requirements in full. Due
to the extensive use of diagrams and photographs, it is no longer
appropriate or practical to write the requirements of the service
bulletin out in full in this AD. All requirements, accomplishment
instructions and illustrations are contained in the service bulletin.
The FAA is revising AD 2010-10-01 to allow the use of issue 6 or issue
5 of the service bulletin. An operator is in compliance if the
operator chooses to only accomplish issue 5 of the SB. This proposed
revision of the FAA's AD will make the FAA AD more consistent with the
latest version of the MCAI.
ACTIONS AND COMPLIANCE
(f) For Group 1 Airplanes: Unless already done, do the following actions:
(1) Within the next 10 hours time-in-service (TIS) after March 2, 2009
(the effective date retained from AD 2009-05-01):
(i) For all aircraft not incorporating computer numeric control (CNC)
machined elevator hinges, inspect and repair the left and right
horizontal stabilizer rear pivot attachment installation following
instruction "3. Rear Pivot Attachment Inspection," of Gippsland
Aeronautics Mandatory Service Bulletin SB-GA8-2002-02, Issue 5, dated
November 13, 2008; or Gippsland Aeronautics Mandatory Service Bulletin
SB-GA8-2002-02, Issue 6, dated April 21, 2010; and
(ii) For all aircraft, inspect the left and right rear attach bolt mating
surfaces for damage or an out of square condition and replace the
left and right rear attach bolts following instruction "5. Rear
Attach Bolt Replacement," of Gippsland Aeronautics Mandatory Service
Bulletin SB-GA8-2002-02, Issue 5, dated November 13, 2008; or
Gippsland Aeronautics Mandatory Service Bulletin SB-GA8-2002-02,
Issue 6, dated April 21, 2010. Reworking the mating surfaces by
spotfacing is no longer acceptable. If the mating surfaces are
damaged, not square, or were previously reworked by spotfacing the
surface, replace the parts as specified in Gippsland Aeronautics
Mandatory Service Bulletin SB-GA8-2002-02, Issue 5, dated November
13, 2008; or Gippsland Aeronautics Mandatory Service Bulletin SB-GA8
-2002-02, Issue 6, dated April 21, 2010.
(2) Within the next 10 hours TIS after March 2, 2009 (the effective date
retained from AD 2009-05-01) and repetitively thereafter at intervals
not to exceed 100 hours TIS or 12 months, whichever occurs first, for
all aircraft:
(i) Inspect the horizontal stabilizer externally following instruction "2.
External Inspection (Lower flange, Stabilizer rear spar)," of
Gippsland Aeronautics Mandatory Service Bulletin SB-GA8-2002-02,
Issue 5, dated November 13, 2008; or Gippsland Aeronautics Mandatory
Service Bulletin SB-GA8-2002-02, Issue 6, dated April 21, 2010; and
(ii) Inspect the horizontal stabilizer internally following instruction
"4. Internal Inspection," of Gippsland Aeronautics Mandatory Service
Bulletin SB-GA8-2002-02, Issue 5, dated November 13, 2008; or
Gippsland Aeronautics Mandatory Service Bulletin SB-GA8-2002-02,
Issue 6, dated April 21, 2010.
(3) If during the inspection required by paragraph (f)(2) of this AD any
excessive local deflection or movement of the lower skin surrounding
the lower pivot attachment, cracking, or working (loose) rivet is
found, before further flight, obtain an FAA-approved repair scheme
from the manufacturer and incorporate this repair scheme. Due to FAA
policy, the repair scheme/modification for crack damage must include
an immediate repair of the crack. The repair scheme cannot be by
repetitive inspection only. The repair scheme/modification may
incorporate repetitive inspections in addition to the repetitive
inspections required in paragraph (f)(2) of this AD. Continued
operational flight with un-repaired crack damage is not permitted.
(g) For Group 2 Airplanes: Unless already done, do the following actions:
(1) Within the next 10 hours TIS after May 10, 2010 (the effective date
retained from AD 2010-10-01):
(i) For all aircraft not incorporating computer numeric control (CNC)
machined elevator hinges, inspect and repair the left and right
horizontal stabilizer rear pivot attachment installation following
instruction "3. Rear Pivot Attachment Inspection," of Gippsland
Aeronautics Mandatory Service Bulletin SB-GA8-2002-02, Issue 5, dated
November 13, 2008; or Gippsland Aeronautics Mandatory Service Bulletin
SB-GA8-2002-02, Issue 6, dated April 21, 2010; and,
(ii) For all aircraft, inspect the left and right rear attach bolt mating
surfaces for damage or an out of square condition and replace the
left and right rear attach bolts following instruction "5. Rear
Attach Bolt Replacement," of Gippsland Aeronautics Mandatory Service
Bulletin SB-GA8-2002-02, Issue 5, dated November 13, 2008; or
Gippsland Aeronautics Mandatory Service Bulletin SB-GA8-2002-02,
Issue 6, dated April 21, 2010. Reworking the mating surfaces by
spotfacing is no longer acceptable. If the mating surfaces are
damaged, not square, or were previously reworked by spotfacing the
surface, before further flight, replace the parts as specified in
Gippsland Aeronautics Mandatory Service Bulletin SB-GA8-2002-02,
Issue 5, dated November 13, 2008; or Gippsland Aeronautics Mandatory
Service Bulletin SB-GA8-2002-02, Issue 6, dated April 21, 2010.
(2) Within the next 10 hours TIS after May 10, 2010 (the effective date
retained from AD 2010-10-01) and repetitively thereafter at intervals
not to exceed 100 hours TIS or 12 months, whichever occurs first, for
all aircraft:
(i) Inspect the horizontal stabilizer externally following instruction "2.
External Inspection (Lower flange, Stabilizer rear spar)," of
Gippsland Aeronautics Mandatory Service Bulletin SB-GA8-2002-02,
Issue 5, dated November 13, 2008; or Gippsland Aeronautics Mandatory
Service Bulletin SB-GA8-2002-02, Issue 6, dated April 21, 2010; and
(ii) Inspect the horizontal stabilizer internally following instruction
"4. Internal Inspection," of Gippsland Aeronautics Mandatory Service
Bulletin SB-GA8-2002-02, Issue 5, dated November 13, 2008; or
Gippsland Aeronautics Mandatory Service Bulletin SB-GA8-2002-02,
Issue 6, dated April 21, 2010.
(3) If during the inspection required by paragraph (g)(2) of this AD any
excessive local deflection or movement of the lower skin surrounding
the lower pivot attachment, cracking, or working (loose) rivet is
found, before further flight, obtain an FAA-approved repair scheme
from the manufacturer and incorporate this repair scheme. Due to FAA
policy, the repair scheme/modification for crack damage must include
an immediate repair of the crack. The repair scheme cannot be by
repetitive inspection only. The repair scheme/modification may
incorporate repetitive inspections in addition to the repetitive
inspections required in paragraph (g)(2) of this AD. Continued
operational flight with un-repaired crack damage is not permitted.
FAA AD DIFFERENCES
NOTE: This AD differs from the MCAI and/or service information as follows:
(1) "Requirement: 1. Daily Inspection (Stabilizer attach bolt)" of the
service information requires a daily inspection of the stabilizer
attach bolt. The daily inspection is not a requirement of this AD.
Instead of the daily inspection, we require you to perform, within 10
hours TIS, "Requirement 3. Rear Pivot Attachment Inspection" and
"Requirement 5. Rear Attachment Bolt Replacement" of the service
information. Compliance with requirement 3. and 5. is a terminating
action for the daily inspection, and we are requiring these within 10
hours TIS after the effective date of AD 2009-05-01 for Group 1
airplanes and AD 2010-10-01 for Group 2 airplanes.
(2) "Requirement: 2. External Inspection (Lower flange, Stabilizer rear
spar)" of the service information does not specify any action if
excessive local deflection or movement of lower skin, cracking, or
working (loose) rivet is found. We require obtaining and incorporating
an FAA-approved repair scheme from the manufacturer before further
flight.
(3) The MCAI does not state if further flight with known cracks is
allowed. FAA policy is to not allow further flight with known cracks
in critical structure. We require that if any cracks are found when
accomplishing the inspection required in paragraphs (f)(2) and (g)(2)
of this AD, you must repair the cracks before further flight.
(4) The service information does not state that parts with spotfaced nut
and bolt mating surfaces require replacement. However, the service
information no longer allows reworking of the mating surfaces by
spotfacing. We require that if any nut and bolt surfaces were
previously reworked by spotfacing, you must replace the parts.
OTHER FAA AD PROVISIONS
(g) The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, Standards
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: Doug Rudolph, Aerospace Engineer, FAA, Small Airplane
Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106;
telephone: (816) 329-4059; fax: (816) 329-4090. 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.
(2) Airworthy Product: For any requirement in this AD to obtain corrective
actions from a manufacturer or other source, use these actions if they
are FAA-approved. Corrective actions are considered FAA-approved if
they are approved by the State of Design Authority (or their delegated
agent). You are required to assure the product is airworthy before it
is returned to service.
(3) Reporting Requirements: For any reporting requirement in this AD,
under the provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et
seq.), the Office of Management and Budget (OMB) has approved the
information collection requirements and has assigned OMB Control
Number 2120-0056.
RELATED INFORMATION
(h) Refer to MCAI Civil Aviation Safety Authority AD No. AD/GA8/5, Amdt 4,
dated May 11, 2010; Gippsland Aeronautics Mandatory Service Bulletin
SB-GA8-2002-02, Issue 5, dated November 13, 2008; and Gippsland
Aeronautics Mandatory Service Bulletin SB-GA8-2002-02, Issue 6, dated
April 21, 2010, for related information.
MATERIAL INCORPORATED BY REFERENCE
(h) You must use Gippsland Aeronautics Mandatory Service Bulletin
SB-GA8-2002-02, Issue 5, dated November 13, 2008; and Gippsland
Aeronautics Mandatory Service Bulletin SB-GA8-2002-02, Issue 6, dated
April 21, 2010, 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 Gippsland Aeronautics Mandatory Service Bulletin SB-GA8
-2002-02, Issue 6, dated April 21, 2010, under 5 U.S.C. 552(a) and 1
CFR part 51.
(2) On March 2, 2009 (74 FR 8159; February 24, 2009), the Director of the
Federal Register previously approved the incorporation by reference of
Gippsland Aeronautics Mandatory Service Bulletin SB-GA8-2002-02, Issue
5, dated November 13, 2008.
(3) For service information identified in this AD, contact Gippsland
Aeronautics, Attn: Technical Services, P.O. Box 881, Morwell Victoria
3840, Australia; telephone: + 61 03 5172 1200; fax: +61 03 5172 1201;
Internet: http://www.gippsaero.com.
(4) You may review copies of the service information incorporated by
reference for this AD at the FAA, Central Region, Office of the
Regional Counsel, 901 Locust, Kansas City, Missouri 64106. For
information on the availability of this material at the Central
Region, call (816) 329-3768.
(5) 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.
Issued in Kansas City, Missouri, on August 25, 2010. John R. Colomy,
Acting Manager, Small Airplane Directorate, Aircraft Certification
Service.
FOR FURTHER INFORMATION CONTACT: Doug Rudolph, Aerospace Engineer, FAA,
Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri
64106; telephone: (816) 329-4059; fax: (816) 329-4090.
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AGENCY: Federal Aviation Administration
(FAA), Department of Transportation (DOT).
ACTION: Final rule.
SUMMARY: We are revising an existing airworthiness directive (AD)
for the products listed above. This AD results from mandatory continuing
airworthiness information (MCAI) issued by an aviation authority of another
country to identify and correct an unsafe condition on an aviation product.
The MCAI describes the unsafe condition as:
Inspection of a high time aircraft has revealed cracks in the Horizontal
Stabiliser rear spar splice plate and inboard main ribs around the area
of the Horizontal Stabiliser rear pivot attachment. Additionally, failure
of some attach bolts in service may be due to improper assembly.
This amendment is issued to include an applicability matrix (Table 1,
page 2) in the compliance section of the service bulletin for improved
clarity.
We are issuing this AD to require actions to correct the unsafe condition
on these products.
DATES: This AD becomes effective October 7, 2010.
On October 7, 2010, the Director of the Federal Register approved the
incorporation by reference of Gippsland Aeronautics Mandatory Service
Bulletin SB-GA8-2002-02, Issue 6, dated April 21, 2010, listed in this
AD.
As of March 2, 2009 (74 FR 8159; February 24, 2009), the Director of the
Federal Register approved the incorporation by reference of Gippsland
Aeronautics Mandatory Service Bulletin SB-GA8-2002-02, Issue 5, dated
November 13, 2008, listed in this AD.
DATES: This AD becomes effective October 7, 2010.
ADDRESSES: You may examine the AD docket on the Internet at http://
www.regulations.gov or in person at the Docket Management Facility, U.S.
Department of Transportation, Docket Operations, M-30, West Building Ground
Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Doug Rudolph, Aerospace Engineer,
FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri
64106; telephone: (816) 329-4059; fax: (816) 329-4090.
SUPPLEMENTARY INFORMATION:
Discussion
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part
39 to include an AD that would apply to the specified products. That NPRM
was published in the Federal Register on June 21, 2010 (75 FR 34953),
and proposed to revise AD 2010-10-01, Amendment 39-16280 (75 FR 23577,
May 4, 2010).
Since we issued AD 2010-10-01, the foreign authority has issued an amendment
to include an applicability matrix in the compliance section of the manufacturer's
service bulletin for improved clarity. The FAA is revising this AD to
allow the use of issue 6 or issue 5 of the service bulletin. An operator
would be in compliance if the operator chose to only accomplish issue
5 of the service bulletin. This revision of the FAA's AD will make the
FAA AD more in line with the latest version of the received MCAI.
The NPRM proposed to correct an unsafe condition for the specified products.
The MCAI states that:
Inspection of a high time aircraft has revealed cracks in the Horizontal
Stabiliser rear spar splice plate and inboard main ribs around the area
of the Horizontal Stabiliser rear pivot attachment. Additionally, failure
of some attach bolts in service may be due to improper assembly.
This amendment is issued to include an applicability matrix (Table 1,
page 2) in the compliance section of the service bulletin for improved
clarity.
The previous amendment included reference to the GA8-TC 320 variant in
the applicability section.
Amendment 2 was issued because the requirement document now contains an
inspection for cracking in horizontal stabilisers which have load transferring
fittings installed.
Previous amendments of this AD listed the AD requirements in full. Due
to the extensive use of diagrams and photographs, it is no longer appropriate
or practical to write the requirements of the service bulletin out in
full in this AD. All requirements, accomplishment instructions and illustrations
are contained in the service bulletin.
Comments
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 public.
Conclusion
We reviewed the available data and determined that air safety and the
public interest require adopting the AD as proposed.
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 service information.
We might also have required different actions in this AD from those in
the MCAI in order to follow FAA policies. Any such differences are highlighted
in a note within the AD.
Costs of Compliance
We estimate that this AD will affect 25 products of U.S. registry. We
also estimate that it will take about 1 work-hour per product to comply
with the basic requirements of this AD. The average labor rate is $85
per work-hour. Required parts will cost about $0 per product.
Based on these figures, we estimate the cost of this AD to the U.S. operators
to be $2,125 or $85 per product.
In addition, we estimate that any necessary follow-on actions would take
about 5 work-hours and require parts costing $200, for a cost of $625
per product. We have no way of determining the number of products that
may need these actions.
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 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 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 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 Management Facility 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 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,
Safety.
Adoption of the Amendment
Accordingly, under the authority delegated to me by the Administrator,
the FAA amends 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 removing Amendment 39-16280 (75 FR 23577,
May 4, 2010) and adding the following new AD:
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