FR Doc 04-11877

[Federal Register: May 26, 2004 (Volume 69, Number 102)]
[Proposed Rules]
[Page 29910-29912]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr26my04-21]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2004-CE-11-AD]
RIN 2120-AA64

Airworthiness Directives; Raytheon Aircraft Company Model B100
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain Raytheon Aircraft Company (Raytheon) Model B100 airplanes.
This proposed AD would require you to drill holes in the hot lip tube
``B'' nuts; tighten the ``B'' nuts to specified torque ranges; and
secure the ``B'' nuts with safety wire. This proposed AD is the result
of reports of loose ``B'' nuts on the engine inlet that may loosen and
permit a leak in the engine inlet anti-ice system. We are issuing this
proposed AD to detect and correct loose ``B'' nuts on the engine inlet,
which could result in failure of the engine inlet anti-ice system and
consequent ice buildup. This failure and ice buildup could lead to an
engine's ingestion of ice with loss of engine power or loss of engine.

DATES: We must receive any comments on this proposed AD by July 26,
2004.

ADDRESSES: Use one of the following to submit comments on this proposed
AD:

By mail: FAA, Central Region, Office of the Regional
Counsel, Attention: Rules Docket No. 2004-CE-11-AD, 901 Locust, Room
506, Kansas City, Missouri 64106.
By fax: (816) 329-3771.
By e-mail: 9-ACE-7-Docket@faa.gov. Comments sent
electronically must contain ``Docket No. 2004-CE-11-AD'' in the subject
line. If you send comments electronically as attached electronic files,
the files must be formatted in Microsoft Word 97 for Windows or ASCII.

You may get the service information identified in this proposed AD
from Raytheon Aircraft Company, 9709 E. Central, Wichita, Kansas 67201-
0085;

[[Page 29911]]

telephone: (800) 429-5372 or (316) 676-3140.
You may view the AD docket at FAA, Central Region, Office of the
Regional Counsel, Attention: Rules Docket No. 2004-CE-11-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: Jeff Pretz, Aerospace Engineer,
Wichita Aircraft Certification Office, FAA, 1801 Airport Road, Mid-
Continent Airport, Wichita, Kansas 67209; telephone: (316) 946-4153;
facsimile: (316) 946-4407.

SUPPLEMENTARY INFORMATION:

Comments Invited

How do I comment on this proposed AD? We invite you to submit any
written relevant data, views, or arguments regarding this proposal.
Send your comments to an address listed under ADDRESSES. Include ``AD
Docket No. 2004-CE-11-AD'' in the subject line of your comments. If you
want us to acknowledge receipt of your mailed comments, send us a self-
addressed, stamped postcard with the docket number written on it. We
will date-stamp your postcard and mail it back to you.
Are there any specific portions of this proposed AD I should pay
attention to? We specifically invite comments on the overall
regulatory, economic, environmental, and energy aspects of this
proposed AD. If you contact us through a nonwritten communication and
that contact relates to a substantive part of this proposed AD, we will
summarize the contact and place the summary in the docket. We will
consider all comments received by the closing date and may amend this
proposed AD in light of those comments and contacts.

Discussion

What events have caused this proposed AD? The FAA has received six
reports of loose ``B'' nuts on the Raytheon Model B100 engine inlet
anti-ice system found during routine maintenance. These loose ``B''
nuts may permit a leak in the engine inlet anti-ice system that would
result in failure of the system with consequent ice buildup on the
engine inlet.
What is the potential impact if FAA took no action? Failure of the
engine inlet anti-ice system and consequent ice buildup could lead to
an engine's ingestion of ice with loss of engine power or loss of
engine.
Is there service information that applies to this subject? Raytheon
has issued Service Bulletin No. SB 30-3143, dated September 2001.
What are the provisions of this service information? The service
bulletin includes procedures for:

--Drilling a 0.035-inch hole in each of the hot lip tube ``B'' nuts
(part numbers (P/N) AN818-6D and AN818-8D);
--tightening P/N AN818-6D ``B'' nuts to a torque range of 75 to 125
inch-pounds and P/N AN818-8D ``B'' nuts to a torque range of 150 to 250
inch-pounds; and
--securing the ``B'' nuts (P/N AN818-6D and P/N AN818-8D) with safety
wire.

FAA's Determination and Requirements of This Proposed AD

What has FAA decided? We have evaluated all pertinent information
and identified an unsafe condition that is likely to exist or develop
on other products of this same type design. Therefore, we are proposing
AD action.
What would this proposed AD require? This proposed AD would require
you to incorporate the actions in the previously-referenced service
bulletin.
How does the revision to 14 CFR part 39 affect this proposed AD? On
July 10, 2002, we published a new version of 14 CFR part 39 (67 FR
47997, July 22, 2002), which governs 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 would this proposed AD impact? We estimate that
this proposed AD affects 96 airplanes in the U.S. registry.
What would be the cost impact of this proposed AD on owners/
operators of the affected airplanes? We estimate the following costs to
accomplish this proposed inspection and modification:

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Total cost
Labor cost Parts cost Total cost on U.S.
per airplane operations
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4 workhours x $65 per hour = $260............... Not applicable.................... $260 $24,960
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Regulatory Findings

Would this proposed AD impact various entities? 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.
Would this proposed AD involve a significant rule or regulatory
action? For the reasons discussed above, I certify that this proposed
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 proposed 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. 2004-CE-11-AD'' in your request.

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 Federal Aviation Administration 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
airworthiness directive (AD):

[[Page 29912]]

Raytheon Aircraft Company: Docket No. 2004-CE-11-AD

When Is the Last Date I Can Submit Comments on This Proposed AD?

(a) We must receive comments on this proposed airworthiness
directive (AD) by July 26, 2004.

What Other ADs Are Affected by This Action?

(b) None.

What Airplanes Are Affected by This AD?

What Is the Unsafe Condition Presented in This AD?

(d) This AD is the result of reports of loose ``B'' nuts on the
engine inlet that may loosen and permit a leak in the engine inlet
anti-ice system. The actions specified in this AD are intended to
detect and correct loose ``B'' nuts on the engine inlet, which could
result in failure of the engine inlet anti-ice system and consequent
ice buildup. This failure and ice buildup could lead to an engine's
ingestion of ice with loss of engine power or loss of engine.

What Must I Do To Address This Problem?

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

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Actions Compliance Procedures
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(1) Drill a 0.035-inch hole in Within the next Follow Raytheon
each of the hot lip tube ``B'' 150 hours time-in- Aircraft
nuts (part number (P/N) AN818- service (TIS) or Mandatory Service
6D and AN818-8D). 6 calendar months Bulletin No. SB
after the 30-3143, dated
effective date of September 2001.
this AD, The applicable
whichever occurs airplane
first. maintenance
manual also
addresses this
issue.
(2) Tighten the hot lip tube Before further Follow Raytheon
``B'' nuts to a specified flight after the Aircraft
torque range:. actions required Mandatory Service
(i) Tighten hot lip tube ``B'' by paragraph Bulletin No. SB
nuts P/N AN818-6D to a torque (e)(1) of this AD. 30-3143, dated
range of 75 to 125 inch-pounds. September 2001.
The applicable
airplane
maintenance
manual also
addresses this
issue.
(ii) Tighten hot lip tube ``B''
nuts P/N AN818-8D to a torque
range of 150 to 250 inch-pounds.
(3) Secure the hot lip tube Before further Follow Raytheon
``B'' nuts (P/N AN818-6D and flight after the Aircraft
AN818-8D) with safety wire. actions required Mandatory Service
by paragraph Bulletin No. SB
(e)(2) of this AD. 30-3143, dated
September 2001.
The applicable
airplane
maintenance
manual also
addresses this
issue.
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May I Request an Alternative Method of Compliance?

(f) 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, Wichita Aircraft
Certification Office (ACO), FAA. For information on any already
approved alternative methods of compliance, contact Jeff Pretz,
Aerospace Engineer, Wichita ACO, FAA, 1801 Airport Road, Mid-
Continent Airport, Wichita, Kansas 67209; telephone: (316) 946-4153;
facsimile: (316) 946-4407.

May I Get Copies of the Documents Referenced in This AD?

(g) You may get copies of the documents referenced in this AD
from Raytheon Aircraft Company, 9709 E. Central, Wichita, Kansas
67201-0085; telephone: (800) 429-5372 or (316) 676-3140. You may
view these documents at FAA, Central Region, Office of the Regional
Counsel, 901 Locust, Room 506, Kansas City, Missouri 64106.

Issued in Kansas City, Missouri, on May 20, 2004.
James E. Jackson,
Acting Manager, Small Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 04-11877 Filed 5-25-04; 8:45 am]

BILLING CODE 4910-13-P