Airworthiness Directives; Bombardier Model DHC-7-100, DHC-7-101, DHC-7-102, and DHC-7-103 Airplanes, 44274-44276 [05-15012]

Download as PDF 44274 Federal Register / Vol. 70, No. 147 / Tuesday, August 2, 2005 / Rules and Regulations 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 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. 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 Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: I 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. § 39.13 [Amended] FAA–2005–20111; Directorate Identifier 2004–NM–154–AD. Effective Date (a) This AD becomes effective September 6, 2005. Affected ADs (b) None. Applicability (c) This AD applies to Raytheon Model HS.125 series 700A airplanes, BAe.125 series 800A airplanes, and Model Hawker 800 and Hawker 800XP airplanes; certificated in any category; equipped with Brailsford TBL–2.5 blowers; as identified in Raytheon Service Bulletin SB 24–3272, Revision 1, dated October 2000. Unsafe Condition (d) This AD results from a report indicating that a cockpit ventilation and avionics cooling system blower motor seized up and gave off smoke. We are issuing this AD to prevent smoke and fumes in the cockpit in the event that a blower motor seizes and overheats due to excessive current draw. 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. Inspection and Corrective Actions (f) Within 600 flight hours or 6 months after the effective date of this AD, whichever occurs first, inspect to determine the current rating of the circuit breakers of certain cockpit ventilation and avionics cooling system blowers; and, before further flight, replace the circuit breakers and modify the blower wiring, as applicable; by doing all the actions in accordance with the Accomplishment Instructions of Raytheon Service Bulletin SB 24–3272, Revision 1, dated October 2000; except as provided by paragraphs (g) and (h) of this AD. Contacting the Manufacturer (g) Where the service bulletin specifies contacting the manufacturer for information if any difficulties are encountered while accomplishing the service bulletin, this AD requires you to contact the Manager, Wichita Aircraft Certification Office (ACO), FAA. No Reporting Requirement (h) Although the service bulletin referenced in this AD specifies to submit certain information to the manufacturer, this AD does not include this requirement. Alternative Methods of Compliance (AMOCs) (i) The Manager, Wichita ACO, 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 2. The Federal Aviation Administration (FAA) amends § 39.13 by (j) You must use Raytheon Service Bulletin adding the following new airworthiness SB 24–3272, Revision 1, dated October 2000, directive (AD): to perform the actions that are required by I 2005–16–02 Raytheon Aircraft Company: Amendment 39–14207. Docket No. VerDate jul<14>2003 15:06 Aug 01, 2005 Jkt 205001 this AD, unless the AD specifies otherwise. The Director of the Federal Register approved PO 00000 Frm 00056 Fmt 4700 Sfmt 4700 the incorporation by reference of this document in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Raytheon Aircraft Company, Department 62, P.O. Box 85, Wichita, Kansas 67201–0085, for a copy of this service information. You may review copies at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., Room PL–401, Nassif Building, Washington, DC; on the Internet at http://dms.dot.gov; or at the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741– 6030, or go to http://www.archives.gov/ federal_register/code_of_federal_regulations/ ibr_locations.html. Issued in Renton, Washington, on July 21, 2005. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05–15011 Filed 8–1–05; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2005–20595; Directorate Identifier 2004–NM–149–AD; Amendment 39–14208; AD 2005–16–03] RIN 2120–AA64 Airworthiness Directives; Bombardier Model DHC–7–100, DHC–7–101, DHC– 7–102, and DHC–7–103 Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain Bombardier Model DHC–7–100, DHC– 7–101, DHC–7–102, and DHC–7–103 airplanes. This AD requires revising the Airworthiness Limitations section of the Instructions of Continued Airworthiness to include a new, lower life limit for lower wing skins. This AD results from the discovery that, during the manufacture of the lower wing skins, score marks may have been accidentally inscribed around the edge of the lower wing skin doublers. We are issuing this AD to prevent fatigue cracks from developing at the score marks in the lower wing skins, which could result in the structural failure of the wing. DATES: Effective September 6, 2005. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in the AD as of September 6, 2005. ADDRESSES: You may examine the AD docket on the Internet at http:// E:\FR\FM\02AUR1.SGM 02AUR1 Federal Register / Vol. 70, No. 147 / Tuesday, August 2, 2005 / Rules and Regulations dms.dot.gov or in person at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW., Nassif Building, Room PL–401, Washington, DC. Contact Bombardier, Inc., Bombardier Regional Aircraft Division, 123 Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada, for service information identified in this AD. Conclusion FOR FURTHER INFORMATION CONTACT: Costs of Compliance David Lawson, Aerospace Engineer, Airframe and Propulsion Branch, ANE– 171, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, suite 410, Westbury, New York 11590; telephone (516) 228–7327; fax (516) 794–5531. SUPPLEMENTARY INFORMATION: We have carefully reviewed the available data, and determined that air safety and the public interest require adopting the AD with the changes described previously. We have determined that these changes will neither increase the economic burden on any operator nor increase the scope of the AD. This AD will affect about 3 airplanes of U.S. registry. The revision of the Airworthiness Limitations section will take about 1 work hour per airplane, at an average labor rate of $65 per work hour. Based on these figures, the estimated cost of the AD for U.S. operators is $195, or $65 per airplane. Examining the Docket Authority for This Rulemaking You may 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 street address stated in the ADDRESSES section. 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. Discussion The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to certain Bombardier Model DHC–7–100, DHC–7–101, DHC–7–102, and DHC–7–103 airplanes. That NPRM was published in the Federal Register on March 15, 2005 (70 FR 12614). That NPRM proposed to require revising the Airworthiness Limitations section of the Instructions of Continued Airworthiness to include a new lower life limit for lower wing skins. Comments We provided the public the opportunity to participate in the development of this AD. We received no comments on the NPRM or on the determination of the cost to the public. Explanation of Change to Applicability We have revised the applicability of the NPRM to identify model designations as published in the most recent type certificate data sheet for the affected models. Explanation of Correction to Paragraph (h) We have revised paragraph (h) of this AD to include reference to paragraph (g). Reference to that paragraph was inadvertently omitted from the NPRM. VerDate jul<14>2003 15:06 Aug 01, 2005 Jkt 205001 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 under the criteria of the Regulatory Flexibility Act. PO 00000 Frm 00057 Fmt 4700 Sfmt 4700 44275 We prepared a regulatory evaluation of the estimated costs to comply with this AD and placed it in the AD docket. 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 Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: I PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: I Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The Federal Aviation Administration (FAA) amends § 39.13 by adding the following new airworthiness directive (AD): I 2005–16–03 Bombardier, Inc. (Formerly de Havilland, Inc.): Amendment 39–14208. Docket No. FAA–2005–20595; Directorate Identifier 2004–NM–149–AD. Effective Date (a) This AD becomes effective September 6, 2005. Affected ADs (b) None. Applicability (c) This AD applies to Bombardier Model DHC–7–100, DHC–7–101, DHC–7–102, and DHC–7–103 airplanes, serial numbers 3 through 10 inclusive, 12 through 14 inclusive, and 16 through 27 inclusive; certificated in any category. Note 1: This AD requires revision to a certain operator maintenance document to include a new replacement time. Compliance with this replacement time is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by this replacement time, the operator may not be able to accomplish the replacement described in the revision. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance according to paragraph (i) of this AD. The request should include a description of changes to the required replacement time that will ensure the continued damage tolerance of the affected structure. The FAA has provided guidance for this determination in Advisory Circular (AC) 25–1529. Unsafe Condition (d) This AD is prompted by the discovery that, during the manufacture of the lower wing skins, score marks may have been accidentally inscribed around the edge of the E:\FR\FM\02AUR1.SGM 02AUR1 44276 Federal Register / Vol. 70, No. 147 / Tuesday, August 2, 2005 / Rules and Regulations lower wing skin doublers. We are issuing this AD to prevent fatigue cracks from developing at the score marks in the lower wing skins, which could result in the structural failure of the wing. Compliance Issued in Renton, Washington, on July 21, 2005. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05–15012 Filed 8–1–05; 8:45 am] (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. BILLING CODE 4910–13–P Revise the Airworthiness Limitations (AWL) Section—New Life Limit Federal Aviation Administration (f) Within 30 days after the effective date of this AD, revise the AWL section of the Instructions for Continued Airworthiness to incorporate new life limits for the lower wing skins by incorporating Bombardier Temporary Revision (TR) 5–103, dated March 26, 2004, to the Bombardier Dash 7 Series 100 Maintenance Manual, PSM 1–7–2, into the AWL section. (g) When the contents of Bombardier TR 5– 103, dated March 26, 2004, have been included in the general revisions of the AWL section, the general revisions may be incorporated into the AWL section, and the TR may be removed from the AWL section. (h) After the actions specified in paragraphs (f) and (g) of this AD have been accomplished, no alternative life limits may be approved for the lower wing skins, except as provided in paragraph (i) of this AD. 14 CFR Part 39 Alternative Methods of Compliance (AMOCs) (i) The Manager, New York Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. Related Information (j) Canadian airworthiness directive CF– 2004–12, dated June 28, 2004, also addresses the subject of this AD. Material Incorporated by Reference (k) You must use Bombardier Temporary Revision 5–103 to Chapter 5–10–11 of the Bombardier Dash 7 Series 100 Maintenance Manual, PSM 1–7–2, dated March 26, 2004, to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference of this document in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Bombardier Regional Aircraft Division, 123 Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada, for a copy of this service information. You may review copies at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., Room PL–401, Nassif Building, Washington, DC; on the Internet at http:// dms.dot.gov; or at the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741–6030, or go to http://www.archives.gov/ federal_register/code_of_federal_regulations/ ibr_locations.html. VerDate jul<14>2003 15:06 Aug 01, 2005 Jkt 205001 DEPARTMENT OF TRANSPORTATION [Docket No. FAA–2005–20661; Directorate Identifier 2004–NM–261–AD; Amendment 39–14206; AD 2005–16–01] RIN 2120–AA64 Airworthiness Directives; Boeing Model 747–200B, 747–300, 747–400, and 747–400D Series Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747–200B, 747–300, 747– 400, and 747–400D series airplanes. This AD requires modifying the lateral shear beam for the Door 5 crew rest and, for certain airplanes, replacing Zone E tie rods and modifying the Zone E stowbin ladder. This AD results from a report indicating that the lateral shear beam for the Door 5 crew rest does not meet the 9G forward loading requirement. We are issuing this AD to prevent the structural support for the Door 5 crew rest and Zone E stowbins from failing, which could result in the crew rest or stowbins falling during an emergency and consequent injury to crew and passengers. DATES: This AD becomes effective September 6, 2005. The Director of the Federal Register approved the incorporation by reference of certain publications listed in the AD as of September 6, 2005. ADDRESSES: You may examine the AD docket on the Internet at http:// dms.dot.gov or in person at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW., Nassif Building, Room PL–401, Washington, DC. Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124–2207, for service information identified in this AD. FOR FURTHER INFORMATION CONTACT: Don Wren, Aerospace Engineer, Cabin Safety and Environmental Systems Branch, ANM–150S, FAA, Seattle Aircraft PO 00000 Frm 00058 Fmt 4700 Sfmt 4700 Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98055–4056; telephone (425) 917–6451; fax (425) 917–6590. SUPPLEMENTARY INFORMATION: Examining the Docket You may examine the AD docket 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 street address stated in the ADDRESSES section. This docket number is FAA–2005– 20661; the directorate identifier for this docket is 2004–NM–261–AD. Discussion The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to certain Boeing Model 747– 200B, 747–300, 747–400, and 747–400D series airplanes. That NPRM was published in the Federal Register on March 22, 2005 (70 FR 14428). That NPRM proposed to require modifying the lateral shear beam for the Door 5 crew rest and, for certain airplanes, replacing the Zone E tie rods and modifying the Zone E stowbin ladder. Comments We provided the public the opportunity to participate in the development of this AD. We have considered the comments that have been received on the NPRM. Support for the Proposed AD One commenter, the manufacturer, supports the proposed AD. Request To Reduce Compliance Time One commenter requests that the compliance time of 5 years to accomplish the actions specified in the proposed AD be shortened substantially. The commenter states that a 5-year compliance time is too long given that the affected lateral shear beam does not meet the 9G forward loading requirement. We do not agree. The lateral shear beam has been substantiated to be structurally capable of carrying all flight, gust, and ground loads that may be encountered during normal operations by the subject Model 747– 200B, 747–300, 747–400, and 747–400D series airplanes. The 9G forward loading requirement of section 25.561 (‘‘General’’) of the Federal Aviation Regulations (14 CFR 25.561) is an emergency landing load condition only E:\FR\FM\02AUR1.SGM 02AUR1

Agencies

[Federal Register Volume 70, Number 147 (Tuesday, August 2, 2005)]
[Rules and Regulations]
[Pages 44274-44276]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 05-15012]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2005-20595; Directorate Identifier 2004-NM-149-AD; 
Amendment 39-14208; AD 2005-16-03]
RIN 2120-AA64


Airworthiness Directives; Bombardier Model DHC-7-100, DHC-7-101, 
DHC-7-102, and DHC-7-103 Airplanes

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

ACTION: Final rule.

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

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain Bombardier Model DHC-7-100, DHC-7-101, DHC-7-102, and DHC-7-103 
airplanes. This AD requires revising the Airworthiness Limitations 
section of the Instructions of Continued Airworthiness to include a 
new, lower life limit for lower wing skins. This AD results from the 
discovery that, during the manufacture of the lower wing skins, score 
marks may have been accidentally inscribed around the edge of the lower 
wing skin doublers. We are issuing this AD to prevent fatigue cracks 
from developing at the score marks in the lower wing skins, which could 
result in the structural failure of the wing.

DATES: Effective September 6, 2005.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in the AD as of September 6, 
2005.

ADDRESSES: You may examine the AD docket on the Internet at http://

[[Page 44275]]

dms.dot.gov or in person at the Docket Management Facility, U.S. 
Department of Transportation, 400 Seventh Street, SW., Nassif Building, 
Room PL-401, Washington, DC.
    Contact Bombardier, Inc., Bombardier Regional Aircraft Division, 
123 Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada, for service 
information identified in this AD.

FOR FURTHER INFORMATION CONTACT: David Lawson, Aerospace Engineer, 
Airframe and Propulsion Branch, ANE-171, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, suite 410, Westbury, New 
York 11590; telephone (516) 228-7327; fax (516) 794-5531.

SUPPLEMENTARY INFORMATION:

Examining the Docket

    You may 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 street address stated in the 
ADDRESSES section.

Discussion

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 to include an AD that would apply to certain Bombardier 
Model DHC-7-100, DHC-7-101, DHC-7-102, and DHC-7-103 airplanes. That 
NPRM was published in the Federal Register on March 15, 2005 (70 FR 
12614). That NPRM proposed to require revising the Airworthiness 
Limitations section of the Instructions of Continued Airworthiness to 
include a new lower life limit for lower wing skins.

Comments

    We provided the public the opportunity to participate in the 
development of this AD. We received no comments on the NPRM or on the 
determination of the cost to the public.

Explanation of Change to Applicability

    We have revised the applicability of the NPRM to identify model 
designations as published in the most recent type certificate data 
sheet for the affected models.

Explanation of Correction to Paragraph (h)

    We have revised paragraph (h) of this AD to include reference to 
paragraph (g). Reference to that paragraph was inadvertently omitted 
from the NPRM.

Conclusion

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

Costs of Compliance

    This AD will affect about 3 airplanes of U.S. registry. The 
revision of the Airworthiness Limitations section will take about 1 
work hour per airplane, at an average labor rate of $65 per work hour. 
Based on these figures, the estimated cost of the AD for U.S. operators 
is $195, or $65 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 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. 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 Federal Aviation Administration (FAA) amends Sec.  39.13 by 
adding the following new airworthiness directive (AD):

2005-16-03 Bombardier, Inc. (Formerly de Havilland, Inc.): Amendment 
39-14208. Docket No. FAA-2005-20595; Directorate Identifier 2004-NM-
149-AD.

Effective Date

    (a) This AD becomes effective September 6, 2005.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Bombardier Model DHC-7-100, DHC-7-101, 
DHC-7-102, and DHC-7-103 airplanes, serial numbers 3 through 10 
inclusive, 12 through 14 inclusive, and 16 through 27 inclusive; 
certificated in any category.

    Note 1: This AD requires revision to a certain operator 
maintenance document to include a new replacement time. Compliance 
with this replacement time is required by 14 CFR 91.403(c). For 
airplanes that have been previously modified, altered, or repaired 
in the areas addressed by this replacement time, the operator may 
not be able to accomplish the replacement described in the revision. 
In this situation, to comply with 14 CFR 91.403(c), the operator 
must request approval for an alternative method of compliance 
according to paragraph (i) of this AD. The request should include a 
description of changes to the required replacement time that will 
ensure the continued damage tolerance of the affected structure. The 
FAA has provided guidance for this determination in Advisory 
Circular (AC) 25-1529.

Unsafe Condition

    (d) This AD is prompted by the discovery that, during the 
manufacture of the lower wing skins, score marks may have been 
accidentally inscribed around the edge of the

[[Page 44276]]

lower wing skin doublers. We are issuing this AD to prevent fatigue 
cracks from developing at the score marks in the lower wing skins, 
which could result in the structural failure of the wing.

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.

Revise the Airworthiness Limitations (AWL) Section--New Life Limit

    (f) Within 30 days after the effective date of this AD, revise 
the AWL section of the Instructions for Continued Airworthiness to 
incorporate new life limits for the lower wing skins by 
incorporating Bombardier Temporary Revision (TR) 5-103, dated March 
26, 2004, to the Bombardier Dash 7 Series 100 Maintenance Manual, 
PSM 1-7-2, into the AWL section.
    (g) When the contents of Bombardier TR 5-103, dated March 26, 
2004, have been included in the general revisions of the AWL 
section, the general revisions may be incorporated into the AWL 
section, and the TR may be removed from the AWL section.
    (h) After the actions specified in paragraphs (f) and (g) of 
this AD have been accomplished, no alternative life limits may be 
approved for the lower wing skins, except as provided in paragraph 
(i) of this AD.

Alternative Methods of Compliance (AMOCs)

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

Related Information

    (j) Canadian airworthiness directive CF-2004-12, dated June 28, 
2004, also addresses the subject of this AD.

Material Incorporated by Reference

    (k) You must use Bombardier Temporary Revision 5-103 to Chapter 
5-10-11 of the Bombardier Dash 7 Series 100 Maintenance Manual, PSM 
1-7-2, dated March 26, 2004, to perform the actions that are 
required by this AD, unless the AD specifies otherwise. The Director 
of the Federal Register approved the incorporation by reference of 
this document in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. 
Contact Bombardier Regional Aircraft Division, 123 Garratt 
Boulevard, Downsview, Ontario M3K 1Y5, Canada, for a copy of this 
service information. You may review copies at the Docket Management 
Facility, U.S. Department of Transportation, 400 Seventh Street SW., 
Room PL-401, Nassif Building, Washington, DC; on the Internet at 
http://dms.dot.gov; or at the National Archives and Records 
Administration (NARA). For information on the availability of this 
material at the NARA, call (202) 741-6030, or go to http://
www.archives.gov/federal_register/code_of_federal_regulations/
ibr_locations.html.

    Issued in Renton, Washington, on July 21, 2005.
Kevin M. Mullin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 05-15012 Filed 8-1-05; 8:45 am]
BILLING CODE 4910-13-P