AD 2004-06-10
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Nomad TC Pty Ltd | N22B | Airworthiness Directives; AeroSpace Technologies of Australia Pty Ltd Airplanes |
| aircraft | Nomad TC Pty Ltd | N22S | Airworthiness Directives; AeroSpace Technologies of Australia Pty Ltd Airplanes |
| aircraft | Nomad TC Pty Ltd | N24A | Airworthiness Directives; AeroSpace Technologies of Australia Pty Ltd Airplanes |
Unsafe Condition
Cracks in the rear fuselage frame could result in failure of the fuselage rear bulkhead and consequent loss of structural integrity.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the forward and aft face of the rear fuselage frame for cracks. Repair or modify the frame as necessary.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
AeroSpace Technologies of Australia Pty Ltd Model N22B, N22S, and N24A airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
The FAA adopts a new airworthiness directive (AD) for all AeroSpace Technologies of Australia Pty Ltd Model N22B, N22S, and N24A airplanes. This AD requires you to inspect the forward and aft face of the rear fuselage frame for cracks and to repair or modify accordingly. This AD is the result of mandatory continuing airworthiness information issued by the airworthiness authority for Australia. We are issuing this AD to detect and correct cracks in the rear fuselage frame, which could result in failure of the fuselage rear bulkhead and consequent loss of structural integrity.
Document Text
Show stored source text (verify against official source)
[Federal Register Volume 69, Number 62 (Wednesday, March 31, 2004)]
[Rules and Regulations]
[Pages 16775-16778]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 04-6417]
=======================================================================
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2000-CE-43-AD; Amendment 39-13536; AD 2004-06-10]
RIN 2120-AA64
Airworthiness Directives; AeroSpace Technologies of Australia Pty
Ltd Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA adopts a new airworthiness directive (AD) for all
AeroSpace Technologies of Australia Pty Ltd Model N22B, N22S, and N24A
airplanes. This AD requires you to inspect the forward and aft face of
the rear fuselage frame for cracks and to repair or modify accordingly.
This AD is the result of mandatory continuing airworthiness information
issued by the airworthiness authority for Australia. We are issuing
this AD to detect and correct cracks in the rear fuselage frame, which
could result in failure of the fuselage rear bulkhead and consequent
loss of structural integrity.
DATES: This AD becomes effective on April 28, 2004.
As of April 28, 2004, the Director of the Federal Register approved
the incorporation by reference of certain publications listed in the
regulation.
ADDRESSES: You may get the service information identified in this AD
from AeroSpace Technologies of Australia Pty Ltd; 226 Lorimer Street,
Port Melbourne Victoria 3207, Australia.
You may view the AD docket at FAA, Central Region, Office of the
Regional Counsel, Attention: Rules Docket No. 2000-CE-43-AD, 901
Locust, Room 506, Kansas City, Missouri 64106. Office hours are 8 a.m.
to 4 p.m., Monday through Friday, except Federal holidays.
FOR FURTHER INFORMATION CONTACT: Ron Atmur, Senior Aerospace Engineer,
Airframe Branch, ANM-120L, FAA, Los Angeles Aircraft Certification
Office, 3960 Paramount Boulevard, Lakewood, California 90712-4137;
telephone: (562) 627-5224; facsimile: (562) 627-5210.
SUPPLEMENTARY INFORMATION:
Discussion
What Events Have Caused This AD?
The Civil Aviation Safety Authority (CASA), which is the
airworthiness authority for Australia, recently notified FAA that an
unsafe condition may exist on all AeroSpace Technologies of Australia
Pty Ltd N22 and N24 series airplanes. The CASA received a number of
reports of airplanes with cracks around the rivet heads on the rear
bulkhead frame. The cracks could result in failure of the fuselage rear
bulkhead and consequent loss of airplane control.
What Is the Potential Impact If FAA Took No Action?
If not detected and corrected, cracks in the rear fuselage frame
could cause the fuselage rear bulkhead to fail. This failure could
result in loss of airplane control.
Has FAA Taken Any Action to This Point?
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 all
AeroSpace Technologies of Australia Pty Ltd Model N22B, N22S, and N24A
airplanes. This proposal was published in the Federal Register as a
notice of proposed rulemaking (NPRM) on December 29, 2003 (68 FR
74874). The NPRM proposed to require you to inspect the rear fuselage
bulkhead of aircraft for cracks and make required repairs and/or
modifications.
Comments
Was the Public Invited To Comment?
We provided the public the opportunity to participate in developing
this AD. We received no comments on the proposal or on the
determination of the cost to the public.
Conclusion
What Is FAA's Final Determination on This Issue?
We have carefully reviewed the available data and determined that
air safety and the public interest require adopting the AD as proposed
except for the changes discussed above and minor editorial corrections.
We have determined that these changes and minor corrections:
<bullet<ls-thn-eq> Are consistent with the intent that was proposed
in the NPRM for correcting the unsafe condition; and
<bullet<ls-thn-eq> Do not add any additional burden upon the public
than was already proposed in the NPRM.
Changes to 14 CFR Part 39--Effect on the AD
How Does the Revision to 14 CFR Part 39 Affect This AD?
On July 10, 2002, the FAA published a new version of 14 CFR part 39
(67 FR 47997, July 22, 2002), which governs the FAA's AD system. This
regulation now includes material that relates to altered products,
special flight permits, and alternative methods of compliance. This
material previously was included in each individual AD. Since this
material is included in 14 CFR part 39, we will not include it in
future AD actions.
Costs of Compliance
How Many Airplanes Does This AD Impact?
We estimate that this AD affects 14 airplanes in the U.S. registry.
What Is the Cost Impact of This AD on Owners/Operators of the Affected
Airplanes?
We estimate the following costs to accomplish the inspection:
----------------------------------------------------------------------------------------------------------------
Total cost Total cost
Labor cost Parts cost per on U.S.
airplane operators
----------------------------------------------------------------------------------------------------------------
General Visual Inspection--0.5 work hours x No parts needed for inspection........ $30 $420
$60 per hour = $30.
[[Page 16776]]
Detailed Visual Inspection--5 work hours x $60 No parts needed for inspection........ 300 4,200
per hour = $300.
----------------------------------------------------------------------------------------------------------------
We estimate the following costs to accomplish any necessary repairs
that will be required based on the results of the inspection. We have
no way of determining the number of airplanes that may need these
repairs:
------------------------------------------------------------------------
Total cost
Labor cost Parts cost per
airplane
------------------------------------------------------------------------
Repair--20 work hours x $60 per hour = $1,200. $1,000 $2,200
------------------------------------------------------------------------
We estimate the following costs to accomplish the modification.
------------------------------------------------------------------------
Total cost Total cost
Labor cost Parts cost per on U.S.
airplane operators
------------------------------------------------------------------------
Modification--24 work hours x $60 $500 $1,940 $27,160
per hour = $1,440...............
------------------------------------------------------------------------
Regulatory Findings
Will This AD Impact Various Entities?
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.
Will This AD Involve a Significant Rule or Regulatory Action?
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
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
``AD Docket No. 2000-CE-43-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. FAA amends Sec. 39.13 by adding a new AD to read as follows:
2004-06-10--Aerospace Technologies of Australia Pty Ltd: Amendment
39-13536; Docket No. 2000-CE-43-AD.
When Does This AD Become Effective?
(a) This AD becomes effective on April 28, 2004.
What Other ADs Are Affected by This Action?
(b) None.
What Airplanes Are Affected by This AD?
(c) This AD affects the following airplane models and line
sequence numbers (serial numbers) that are certificated in any
category:
------------------------------------------------------------------------
Models Line sequence No.
------------------------------------------------------------------------
(1) N22B and N22S......................... 1 through 9, 11 through 29,
31, 33, 35, 37, 39 through
41, 43, 45, 47 through 59,
61, 63, 65 through 70, 82
through 88, 90 through 95,
97, 100, 102 through 114,
116, 118, 125, 126, 131
through 134, 136 through
138, 141, and 143 through
170.
(2) N24A.................................. 10, 30, 32, 34, 36, 38, 42,
44, 46, 60, 62, 64, 71
through 81, 89, 96, 98, 99,
101, 115, 117, 119 through
124, 127 through 130, 135,
139, 140, and 142.
------------------------------------------------------------------------
What Is the Unsafe Condition Presented in This AD?
(d) This AD is the result of reports of cracks around the rivet
heads on the rear bulkhead frame. The actions specified in this AD
are intended to detect and correct cracks in the rear fuselage
bulkhead. The cracks could result in failure of the fuselage rear
bulkhead and consequent loss of structural integrity.
What Must I Do To Address This Problem?
(e) To address this problem, you must do the following:
[[Page 16777]]
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Actions Compliance Procedures
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(1) Perform a general visual inspection For airplanes that have not been Do the inspection following
of the forward face of the rear fuselage repaired as described in the service Section 2.A of Nomad
frame for cracks. bulletin: Inspect within 50 hours time Service Bulletin ANMD-53-
in service (TIS) after April 28, 2004 15. (See paragraph (f) of
(the effective date of this AD), if not this AD for a list of
already inspected. Repetitively inspect effective pages.)
every 100 hours TIS thereafter until
the modification in paragraph (e)(4) of
this AD is done.
For airplanes that have been repaired as
described in the service bulletin:
Inspect within 500 hours TIS after
repair or next 100 hours TIS after
April 28, 2004 (the effective date of
this AD), whichever occurs later.
Repetitively inspect every 100 hours
TIS thereafter until the modification
in paragraph (e)(4) of this AD is done.
------------------------------------------
(2) Perform a detailed visual inspection For airplanes that have been repaired as Do the inspection following
of the aft face of the rear fuselage described in the service bulletin: Section 2.A of Nomad
frame for cracks. Inspect within 500 hours TIS after Service Bulletin ANMD-53-
repair or 100 hours TIS after April 28, 15. (See paragraph (f) of
2004 (the effective date of this AD), this AD for a list of
whichever occurs later. Repetitively effective pages.)
inspect every 300 hours TIS thereafter
or until the modification in paragraph
(e)(4) of this AD is done.
------------------------------------------
(3) Repair any cracks found during any If any cracks are found during a general Do repairs following
general or detailed inspection required or detailed inspection, the airplane Section 2.B of Nomad
by this AD. must be repaired before further flight. Service Bulletin ANMD-53-
See compliance for modification below. 15. (See paragraph (f) of
this AD for a list of
effective pages.)
------------------------------------------
(4) Modify the airplane by installing For airplanes that have not been Do modification following
AeroSpace Technologies of Australia repaired before the effective date of Section 2.C of Nomad
Modification N806. this AD: Modification is mandatory Service Bulletin ANMD-53-
within 100 hours TIS or 12 months after 15. (See paragraph (f) of
April 28, 2004 (the effective date of this AD for a list of
this AD), whichever occurs first. effective pages.)
Modification terminates the inspection
requirements of this AD.
For aircraft that have been repaired
before the effective date of t his AD:
Modification is mandatory within 3,000
hours TIS after incorporation of the
repair or 18 months after April 28,
2004 (the effective date of this AD),
whichever occurs later. Modification
terminates the inspection requirements
of this AD.
----------------------------------------------------------------------------------------------------------------
(f) The Aerospace Technologies of Australia Pty Ltd has issued
the Nomad Alert Service Bulletin ANMD-53-15, which incorporates the
pages as specified in paragraph (h) of this AD.
May I Request an Alternative Method of Compliance?
(g) You may request a different method of compliance or a
different compliance time for this AD by following the procedures in
14 CFR 39.19. Unless FAA authorizes otherwise, send your request to
your principal inspector. The principal inspector may add comments
and will send your request to the Manager, Los Angeles Aircraft
Certification Office (ACO), FAA. For information on any already
approved alternative methods of compliance, contact Ron Atmur,
Senior Aerospace Engineer, Airframe Branch, ANM-120L, FAA, Los
Angeles ACO, 3960 Paramount Boulevard, Lakewood, California 90712-
4137; telephone: (562) 627-5224; facsimile: (562) 627-5210.
Does This AD Incorporate Any Material by Reference?
(h) You must do the actions required by this AD following the
instructions in Nomad Alert Service Bulletin ANMD-53-15, effective
pages as follows:
------------------------------------------------------------------------
Revision
Effective pages level Date
------------------------------------------------------------------------
1-31 (reprint of entire 2 October 6, 1997.
service bulletin).
1 through 4, 13 through 19, 3 June 1, 1999.
and 23 and 24.
------------------------------------------------------------------------
The Director of the Federal Register approved the incorporation
by reference of this service bulletin in accordance with 5 U.S.C.
552(a) and 1 CFR part 51. You may get a copy from AeroSpace
Technologies of Australia Pty Ltd, 226 Lorimer Street, Port
Melbourne Victoria 3207, Australia. You may review copies at FAA,
Central Region, Office of the Regional Counsel, 901 Locust, Room
506, Kansas City, Missouri 64106; or at the Office of the Federal
Register, 800 North Capitol Street, NW., suite 700, Washington, DC.
[[Page 16778]]
Is There Other Information That Relates to This Subject?
(i) Australian Airworthiness Directive AD/GAF-N22/65 Amdt 3,
dated May 5, 2000, also addresses the subject of this AD.
Issued in Kansas City, Missouri, on March 17, 2004.
James E. Jackson,
Acting Manager, Small Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 04-6417 Filed 3-30-04; 8:45 am]
BILLING CODE 4910-13-P
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Retrieved: Apr 6, 2026
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