AD 2008-04-11 R1
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes |
| aircraft | The Boeing Company | 707-100B Long Body | Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes |
| aircraft | The Boeing Company | 707-100B Short Body | Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes |
| aircraft | The Boeing Company | 707-200 | Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes |
| aircraft | The Boeing Company | 707-300 Series | Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes |
| aircraft | The Boeing Company | 707-300B Series | Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes |
| aircraft | The Boeing Company | 707-300C Series | Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes |
| aircraft | The Boeing Company | 707-400 Series | Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes |
| aircraft | The Boeing Company | 720 Series | Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes |
| aircraft | The Boeing Company | 720B Series | Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes |
Unsafe Condition
The potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the FAA-approved maintenance program by incorporating new airworthiness limitations (AWLs) for fuel tank systems, perform an initial inspection to phase in certain repetitive AWL inspections, and repair if 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
The Boeing Company Model 707 airplanes, and Model 720 and 720B series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Fuel tank systems
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - 2008-04-11 R1.pdf Copy URL Document Versions Feedback DetailsAttachments/Public Comments AD Number: 2008-04-11 R1 Document Type: AD Final Rules Docket Number: FAA-2009-1209 Subject Heading: Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes Subject: Fuel tank systems Status: Current Citation: (Federal Register: December 28, 2009 (Volume 74, Number 247)) Citation Publish Date: 12/28/2009 Effective Date: 01/12/2010 Make: The Boeing Company Model: 707-100 Long Body | 707-100B Long Body | 707-100B Short Body | 707-200 | 707-300 Series | 707-300B Series | 707-300C Series | 707-400 Series ...Show more Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: 2008-04-11 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 7 1 [Federal Register: December 28, 2009 (Volume 74, Number 247)] [Rules and Regulations] [Page 68505-68508] From the Federal Register Online via GPO Access [wais.access.gpo.gov] [DOCID:fr28de09-9] –––––––––––––––––––––––––––––––––– DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2009-1209; Directorate Identifier 2009-NM-151-AD; Amendment 39-16147; AD 2008-04-11 R1] RIN 2120-AA64 Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule; request for comments. –––––––––––––––––––––––––––––––––– SUMMARY: The FAA is revising an existing airworthiness directive (AD), which applies to all Model 707 airplanes, and Model 720 and 720B series airplanes. That AD currently requires revising the FAA-approved maintenance program by incorporating new airworthiness limitations (AWLs) for fuel tank systems to satisfy Special Federal Aviation Regulation No. 88 requirements. That AD also requires an initial inspection to phase in certain repetitive AWL inspections, and repair if necessary. This AD clarifies the intended effect of the AD on spare and on-airplane fuel tank system components. This AD results from design review of the fuel tank systems. We are issuing this AD to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane. DATES: This AD is effective January 12, 2010. On March 28, 2008 (73 FR 9666, February 22, 2008), the Director of the Federal Register approved the incorporation by reference of a certain publication listed in the AD. We must receive any comments on this AD by February 11, 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. 2 • Hand Delivery: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone 206-544-5000, extension 1; fax 206-766-5680; e-mail me.boecom@boeing.com; Internet https://www.myboeingfleet.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 Management Facility 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 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: Thomas Thorson, Aerospace Engineer, Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 917-6508; fax (425) 917-6590. SUPPLEMENTARY INFORMATION: Discussion On February 13, 2008, we issued AD 2008-04-11, Amendment 39-15383 (73 FR 9666, February 22, 2008). That AD applied to all Model 707 airplanes, and Model 720 and 720B series airplanes. That AD required revising the FAA-approved maintenance program by incorporating new airworthiness limitations (AWLs) for fuel tank systems to satisfy Special Federal Aviation Regulation No. 88 requirements. That AD also required an initial inspection to phase in certain repetitive AWL inspections, and repair if necessary. That AD resulted from a design review of the fuel tank systems. The actions specified in that AD are intended to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane. 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. Actions Since AD was Issued 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: No person may operate an aircraft for which a manufacturer's maintenance manual or instructions for continued airworthiness has been issued that contains an airworthiness limitation section unless the mandatory * * * procedures * * * have been complied with.
Document Text
Show stored source text (verify against official source)
AD Final Rules - 2008-04-11 R1.pdf Copy URL Document Versions Feedback DetailsAttachments/Public Comments AD Number: 2008-04-11 R1 Document Type: AD Final Rules Docket Number: FAA-2009-1209 Subject Heading: Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes Subject: Fuel tank systems Status: Current Citation: (Federal Register: December 28, 2009 (Volume 74, Number 247)) Citation Publish Date: 12/28/2009 Effective Date: 01/12/2010 Make: The Boeing Company Model: 707-100 Long Body | 707-100B Long Body | 707-100B Short Body | 707-200 | 707-300 Series | 707-300B Series | 707-300C Series | 707-400 Series ...Show more Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: 2008-04-11 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 7 1 [Federal Register: December 28, 2009 (Volume 74, Number 247)] [Rules and Regulations] [Page 68505-68508] From the Federal Register Online via GPO Access [wais.access.gpo.gov] [DOCID:fr28de09-9] –––––––––––––––––––––––––––––––––– DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2009-1209; Directorate Identifier 2009-NM-151-AD; Amendment 39-16147; AD 2008-04-11 R1] RIN 2120-AA64 Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule; request for comments. –––––––––––––––––––––––––––––––––– SUMMARY: The FAA is revising an existing airworthiness directive (AD), which applies to all Model 707 airplanes, and Model 720 and 720B series airplanes. That AD currently requires revising the FAA-approved maintenance program by incorporating new airworthiness limitations (AWLs) for fuel tank systems to satisfy Special Federal Aviation Regulation No. 88 requirements. That AD also requires an initial inspection to phase in certain repetitive AWL inspections, and repair if necessary. This AD clarifies the intended effect of the AD on spare and on-airplane fuel tank system components. This AD results from design review of the fuel tank systems. We are issuing this AD to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane. DATES: This AD is effective January 12, 2010. On March 28, 2008 (73 FR 9666, February 22, 2008), the Director of the Federal Register approved the incorporation by reference of a certain publication listed in the AD. We must receive any comments on this AD by February 11, 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. 2 • Hand Delivery: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone 206-544-5000, extension 1; fax 206-766-5680; e-mail me.boecom@boeing.com; Internet https://www.myboeingfleet.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 Management Facility 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 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: Thomas Thorson, Aerospace Engineer, Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 917-6508; fax (425) 917-6590. SUPPLEMENTARY INFORMATION: Discussion On February 13, 2008, we issued AD 2008-04-11, Amendment 39-15383 (73 FR 9666, February 22, 2008). That AD applied to all Model 707 airplanes, and Model 720 and 720B series airplanes. That AD required revising the FAA-approved maintenance program by incorporating new airworthiness limitations (AWLs) for fuel tank systems to satisfy Special Federal Aviation Regulation No. 88 requirements. That AD also required an initial inspection to phase in certain repetitive AWL inspections, and repair if necessary. That AD resulted from a design review of the fuel tank systems. The actions specified in that AD are intended to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane. 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. Actions Since AD was Issued 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: No person may operate an aircraft for which a manufacturer's maintenance manual or instructions for continued airworthiness has been issued that contains an airworthiness limitation section unless the mandatory * * * procedures * * * have been complied with.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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