AD 2008-09-24 R1
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | DHC-8-400 | Airworthiness Directives; Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 Airplanes |
| aircraft | Bombardier Inc. | DHC-8-401 | Airworthiness Directives; Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 Airplanes |
| aircraft | Bombardier Inc. | DHC-8-402 | Airworthiness Directives; Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 Airplanes |
Unsafe Condition
Failure to preserve critical fuel tank system ignition source prevention features could result in a fuel tank explosion.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness to incorporate the CDCCLs specified in Dash 8 Q400 Temporary Revisions ALI-55 and ALI-56 dated April 19, 2006, into Part 2 of the Bombardier Dash 8 Q400 Maintenance Requirements Manual (MRM) PSM 1-84-7.
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
Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 airplanes
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Fuel
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - 2008-09-24 R1.pdf Copy URL Document Versions Feedback DetailsAttachments/Public Comments AD Number: 2008-09-24 R1 Document Type: AD Final Rules Docket Number: FAA-2009-1106 Subject Heading: Airworthiness Directives; Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 Airplanes Subject: Fuel Status: Current Citation: Federal Register: December 4, 2009 Citation Publish Date: 12/04/2009 Effective Date: 12/21/2009 Make: Bombardier Inc. Model: DHC-8-400 | DHC-8-401 | DHC-8-402 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: 2008-09-24 Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Automatic Zoom Actual Size Page Fit Page Width 50% 75% 100% 125% 150% 200% 300% 400% 125% of 9 1 [Federal Register: December 4, 2009 (Volume 74, Number 232)] [Rules and Regulations] [Page 63595-63598] From the Federal Register Online via GPO Access [wais.access.gpo.gov] [DOCID:fr04de09-19] –––––––––––––––––––––––––––––––––– DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2009-1106; Directorate Identifier 2009-NM-171-AD; Amendment 39-16122; AD 2008-09-24 R1] RIN 2120-AA64 Airworthiness Directives; Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 Airplanes AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule; request for comments. –––––––––––––––––––––––––––––––––– SUMMARY: We are adopting a new airworthiness directive (AD) for the products listed above that would revise an existing AD. This AD results from mandatory continuing airworthiness information (MCAI) originated 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: Bombardier Aerospace has completed a system safety review of the aircraft fuel system against fuel tank safety standards introduced in Chapter 525 of the Airworthiness Manual through Notice of Proposed Amendment (NPA) 2002-043. The identified non- compliances were then assessed using Transport Canada Policy Letter No. 525-001, to determine if mandatory corrective action is required. The assessment showed that it is necessary to introduce Critical Design Configuration Control Limitations (CDCCL), in order to preserve critical fuel tank system ignition source prevention features during configuration changes such as modifications and repairs, or during maintenance actions. Failure to preserve critical fuel tank system ignition source prevention features could result in a fuel tank explosion. * * * This AD requires actions that are intended to address the unsafe condition described in the MCAI. DATES: This AD becomes effective December 21, 2009. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in the AD as of December 21, 2009. On June 6, 2008 (73 FR 24143, May 2, 2008), the Director of the Federal Register approved the incorporation by reference of certain other publications listed in the AD. 2 We must receive comments on this AD by January 19, 2010. ADDRESSES: You may send comments by any of the following methods: • Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments. • Fax: (202) 493-2251. • Mail: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey, Avenue, SE., Washington, DC 20590. • Hand Delivery: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-40, 1200 New Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this AD, contact Bombardier, Inc., 400 Côte-Vertu Road West, Dorval, Québec H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-7401; e-mail thd.qseries@aero.bombardier.com; Internet http://www.bombardier.com. Examining the AD Docket You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Operations office (telephone (800) 647-5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Richard Fiesel, Aerospace Engineer, Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228-7304; fax (516) 794- 5531. SUPPLEMENTARY INFORMATION: Discussion On April 24, 2008, we issued AD 2008-09-24, Amendment 39-15505 (73 FR 24143, May 2, 2008). That AD applied to all Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 airplanes. That AD required revising the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness to incorporate the CDCCLs specified in Dash 8 Q400 (Bombardier) Temporary Revisions (TRs) ALI-55, dated April 19, 2006; and ALI-56, dated April 19, 2006; to Part 2, ''Airworthiness Limitations Items,'' of the Bombardier Dash 8 Q400 Maintenance Requirements Manual (MRM) PSM 1-84-7. Critical design configuration control limitations (CDCCLs) are limitation requirements to preserve a critical ignition source prevention feature of the fuel tank system design that is necessary to prevent the occurrence of an unsafe condition. The purpose of a CDCCL is to provide instruction to retain the critical ignition source prevention feature during configuration change that may be caused by alterations, repairs, or maintenance actions. A CDCCL is not a periodic inspection. Since we issued that AD, we have determined that it is necessary to clarify the AD's intended effect on spare and on-airplane fuel tank system components, regarding the use of maintenance manuals and instructions for continued airworthiness. Section 91.403(c) of the Federal Aviation Regulations (14 CFR 91.403(c)) specifies the following:
Document Text
Show stored source text (verify against official source)
AD Final Rules - 2008-09-24 R1.pdf Copy URL Document Versions Feedback DetailsAttachments/Public Comments AD Number: 2008-09-24 R1 Document Type: AD Final Rules Docket Number: FAA-2009-1106 Subject Heading: Airworthiness Directives; Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 Airplanes Subject: Fuel Status: Current Citation: Federal Register: December 4, 2009 Citation Publish Date: 12/04/2009 Effective Date: 12/21/2009 Make: Bombardier Inc. Model: DHC-8-400 | DHC-8-401 | DHC-8-402 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: 2008-09-24 Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Automatic Zoom Actual Size Page Fit Page Width 50% 75% 100% 125% 150% 200% 300% 400% 125% of 9 1 [Federal Register: December 4, 2009 (Volume 74, Number 232)] [Rules and Regulations] [Page 63595-63598] From the Federal Register Online via GPO Access [wais.access.gpo.gov] [DOCID:fr04de09-19] –––––––––––––––––––––––––––––––––– DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2009-1106; Directorate Identifier 2009-NM-171-AD; Amendment 39-16122; AD 2008-09-24 R1] RIN 2120-AA64 Airworthiness Directives; Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 Airplanes AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule; request for comments. –––––––––––––––––––––––––––––––––– SUMMARY: We are adopting a new airworthiness directive (AD) for the products listed above that would revise an existing AD. This AD results from mandatory continuing airworthiness information (MCAI) originated 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: Bombardier Aerospace has completed a system safety review of the aircraft fuel system against fuel tank safety standards introduced in Chapter 525 of the Airworthiness Manual through Notice of Proposed Amendment (NPA) 2002-043. The identified non- compliances were then assessed using Transport Canada Policy Letter No. 525-001, to determine if mandatory corrective action is required. The assessment showed that it is necessary to introduce Critical Design Configuration Control Limitations (CDCCL), in order to preserve critical fuel tank system ignition source prevention features during configuration changes such as modifications and repairs, or during maintenance actions. Failure to preserve critical fuel tank system ignition source prevention features could result in a fuel tank explosion. * * * This AD requires actions that are intended to address the unsafe condition described in the MCAI. DATES: This AD becomes effective December 21, 2009. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in the AD as of December 21, 2009. On June 6, 2008 (73 FR 24143, May 2, 2008), the Director of the Federal Register approved the incorporation by reference of certain other publications listed in the AD. 2 We must receive comments on this AD by January 19, 2010. ADDRESSES: You may send comments by any of the following methods: • Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments. • Fax: (202) 493-2251. • Mail: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey, Avenue, SE., Washington, DC 20590. • Hand Delivery: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-40, 1200 New Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this AD, contact Bombardier, Inc., 400 Côte-Vertu Road West, Dorval, Québec H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-7401; e-mail thd.qseries@aero.bombardier.com; Internet http://www.bombardier.com. Examining the AD Docket You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Operations office (telephone (800) 647-5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Richard Fiesel, Aerospace Engineer, Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228-7304; fax (516) 794- 5531. SUPPLEMENTARY INFORMATION: Discussion On April 24, 2008, we issued AD 2008-09-24, Amendment 39-15505 (73 FR 24143, May 2, 2008). That AD applied to all Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 airplanes. That AD required revising the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness to incorporate the CDCCLs specified in Dash 8 Q400 (Bombardier) Temporary Revisions (TRs) ALI-55, dated April 19, 2006; and ALI-56, dated April 19, 2006; to Part 2, ''Airworthiness Limitations Items,'' of the Bombardier Dash 8 Q400 Maintenance Requirements Manual (MRM) PSM 1-84-7. Critical design configuration control limitations (CDCCLs) are limitation requirements to preserve a critical ignition source prevention feature of the fuel tank system design that is necessary to prevent the occurrence of an unsafe condition. The purpose of a CDCCL is to provide instruction to retain the critical ignition source prevention feature during configuration change that may be caused by alterations, repairs, or maintenance actions. A CDCCL is not a periodic inspection. Since we issued that AD, we have determined that it is necessary to clarify the AD's intended effect on spare and on-airplane fuel tank system components, regarding the use of maintenance manuals and instructions for continued airworthiness. Section 91.403(c) of the Federal Aviation Regulations (14 CFR 91.403(c)) specifies the following:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
Related Airworthiness Directives
2019-15-09 Recurring
final ruleAirworthiness Directives; Bombardier, Inc., Airplanes
Unsafe Condition: cracking of the outboard spoiler actuator mounting brackets, which could cause inoperability or jam of a single spoiler panel and possible jam of the aileron circuit.
2018-22-03
final ruleAirworthiness Directives; Bombardier, Inc., Airplanes
Unsafe Condition: Cracked and corroded barrel nuts, part number DSC228-12, at the mid-spar location of the horizontal-stabilizer-to-vertical-stabilizer attachment joint due to inadequate cadmium plating, which could...
2018-20-18
final ruleAirworthiness Directives; Bombardier, Inc., Airplanes
Unsafe Condition: Faulty switches in the power lever module could result in uncommanded deployment of the ground spoilers and a possible runway excursion.
2018-17-17
final ruleAirworthiness Directives; Bombardier, Inc., Airplanes
Unsafe Condition: Loose windshield heater terminal lugs could create sparks that lead to burning of the lugs and, due to the excessive heat, cracking of the windshields. If not corrected, such a condition could caus...