Airworthiness Directives; Raytheon Model DH.125, HS.125, and BH.125 Series Airplanes; BAe.125 Series 800A (C-29A and U-125) and 800B Airplanes; and Hawker 800 (Including Variant U-125A) and 800XP Airplanes; Equipped with TFE731 Engines

[Federal Register Volume 70, Number 29 (Monday, February 14, 2005)]
[Rules and Regulations]
[Pages 7389-7390]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 05-2577]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2004-19561; Directorate Identifier 2004-NM-50-AD; 
Amendment 39-13972; AD 2005-03-16]
RIN 2120-AA64


Airworthiness Directives; Raytheon Model DH.125, HS.125, and 
BH.125 Series Airplanes; BAe.125 Series 800A (C-29A and U-125) and 800B 
Airplanes; and Hawker 800 (Including Variant U-125A) and 800XP 
Airplanes; Equipped with TFE731 Engines

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain Raytheon Model DH.125, HS.125, and BH.125 series airplanes; 
BAe.125 series 800A (C-29A and U-125) and 800B airplanes; and Hawker 
800 (including variant U-125A) and 800XP airplanes. This AD requires 
installing insulating blankets on the engine compartment firewall and 
the wire harness passing through the firewall fairlead. This AD is 
prompted by a report indicating that insulation on the wire harness 
passing through the firewall fairlead ignited on the fuselage side of 
the firewall. We are issuing this AD to prevent a fire in the engine 
compartment from causing possible ignition of outgassing wire 
insulation on the fuselage side of the firewall, which could lead to an 
uncontrollable fire in the fuselage.

DATES: This AD becomes effective March 21, 2005.
    The incorporation by reference of a certain publication listed in 
the AD is approved by the Director of the Federal Register as of March 
21, 2005.

ADDRESSES: For service information identified in this AD, contact 
Raytheon Aircraft Company, Department 62, P.O. Box 85, Wichita, Kansas 
67201-0085. You can examine this information 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.
    Docket: The AD docket contains the proposed AD, comments, and any 
final disposition. You can examine the AD docket on the Internet at 
http://dms.dot.gov, or in person at the Docket Management Facility 
office between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The Docket Management Facility office (telephone (800) 647-
5227) is located on the plaza level of the Nassif Building at the U.S. 
Department of Transportation, 400 Seventh Street, SW., room PL-401, 
Washington, DC. This docket number is FAA-2004-19561; the directorate 
identifier for this docket is 2004-NM-50-AD.

FOR FURTHER INFORMATION CONTACT: Jeff Pretz, Aerospace Engineer, 
Airframe Branch, ACE-118W, FAA, Wichita Aircraft Certification Office, 
1801 Airport Road, room 100, Mid-Continent Airport, Wichita, Kansas 
67209; telephone (316) 946-4153; fax (316) 946-4407.

SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR Part 39 
with an AD for certain Raytheon Model DH.125, HS.125, and BH.125 series 
airplanes; BAe.125 series 800A (C-29A and U-125) and 800B airplanes; 
and Hawker 800 (including variant U-125A) and 800XP airplanes. That 
action, published in the Federal Register on November 10, 2004 (69 FR 
65103), proposed to require installing insulating blankets on the 
engine compartment firewall and the wire harness passing through the 
firewall fairlead.

Comments

    We provided the public the opportunity to participate in the 
development of this AD. No comments have been submitted on the proposed 
AD or on the determination of the cost to the public.

Explanation of Change Made to the Proposal

    We inadvertently left the paragraph number off the paragraph headed 
``No Reporting Requirement'' between paragraphs (f) and (g) of the 
proposed AD. We have identified the specified paragraph as (g) and 
reidentified the original paragraph (g) to (h) in the final rule.

Conclusion

    We have carefully reviewed the available data and determined that 
air safety and the public interest require adopting the AD with the 
change described previously. We have determined that this change will 
neither increase the economic burden on any operator nor increase the 
scope of the AD.

Costs of Compliance

    There are about 804 airplanes of the affected design in the 
worldwide fleet. This AD will affect about 530 airplanes of U.S. 
registry. The actions will take about 8 work hours per airplane, at an 
average labor rate of $65 per work hour. Required parts will cost about 
$1,784 per airplane. Based on these figures, the estimated cost of the 
AD for U.S. operators is $1,221,120, or $2,304 per airplane.

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 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 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

[[Page 7390]]

under the criteria of the Regulatory Flexibility Act.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this AD. See the ADDRESSES section for a location to 
examine the regulatory evaluation.

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 FAA amends 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 adding the following new airworthiness 
directive (AD):

2005-03-16 Raytheon Aircraft Company: Amendment 39-13972. Docket No. 
FAA-2004-19561; Directorate Identifier 2004-NM-50-AD.

Effective Date

    (a) This AD becomes effective March 21, 2005.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Raytheon Model DH.125, HS.125, and BH.125 
series airplanes; BAe.125 series 800A (C-29A and U-125) and 800B 
airplanes; and Hawker 800 (including variant U-125A) and 800XP 
airplanes; certificated in any category; equipped with TFE731 
engines; as identified in Raytheon Service Bulletin SB 26-3496, 
dated November 2003.

Unsafe Condition

    (d) This AD was prompted by a report indicating that insulation 
on the wire harness passing through the firewall fairlead ignited on 
the fuselage side of the firewall. We are issuing this AD to prevent 
a fire in the engine compartment from causing possible ignition of 
outgassing wire insulation on the fuselage side of the firewall, 
which could lead to an uncontrollable fire in the fuselage.

Compliance

    (e) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Installation of Insulating Blankets

    (f) Within 12 months after the effective date of this AD, 
install insulating blankets on the engine compartment firewall and 
the wire harness passing through the firewall fairlead, by doing all 
the actions in accordance with the Accomplishment Instructions of 
Raytheon Service Bulletin SB 26-3496, dated November 2003.

No Reporting Requirement

    (g) The service bulletin describes procedures for reporting 
accomplishment of the service bulletin to the manufacturer; however, 
this AD does not require that action.

Alternative Methods of Compliance (AMOCs)

    (h) The Manager, Wichita Aircraft Certification Office (ACO), 
FAA, has the authority to approve AMOCs for this AD, if requested in 
accordance with the procedures found in 14 CFR 39.19.

Material Incorporated by Reference

    (i) You must use Raytheon Service Bulletin SB 26-3496, dated 
November 2003, to perform the actions that are required by this AD, 
unless the AD specifies otherwise. The Director of the Federal 
Register approves the incorporation by reference of this document in 
accordance with 5 U.S.C. 552(a) and 1 CFR part 51. For copies of the 
service information, contact Raytheon Aircraft Company, Department 
62, P.O. Box 85, Wichita, Kansas 67201-0085. For information on the 
availability of this material at the National Archives and Records 
Administration (NARA), call (202) 741-6030, or go to  http://www.archives.gov/federal_register/ code--of--federal--regulations /
ibr--locations.html. You may view the AD docket at the Docket 
Management Facility, U.S. Department of Transportation, 400 Seventh 
Street SW., room PL-401, Nassif Building, Washington, DC.

    Issued in Renton, Washington, on January 31, 2005.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 05-2577 Filed 2-11-05; 8:45 am]
BILLING CODE 4910-13-P

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