AD 2014-05-12
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-100 Series | Airworthiness Directives; The Boeing Company Airplanes |
| aircraft | The Boeing Company | 737-200 Series | Airworthiness Directives; The Boeing Company Airplanes |
| aircraft | The Boeing Company | 737-200C Series | Airworthiness Directives; The Boeing Company Airplanes |
| aircraft | The Boeing Company | 737-300 Series | Airworthiness Directives; The Boeing Company Airplanes |
| aircraft | The Boeing Company | 737-400 Series | Airworthiness Directives; The Boeing Company Airplanes |
| aircraft | The Boeing Company | 737-500 Series | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Cracked, corroded, or fractured carriage spindles of the outboard mid-flaps could lead to severe flap asymmetry, resulting in reduced control or loss of controllability of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Reduce the life limit of the carriages, reduce repetitive inspection and gap check intervals for certain carriages, and add an option for certain replacements involving inspection and corrective actions as necessary.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
before further flight
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Affected Aircraft
The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Wings
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - 2014-05-12.pdf Copy URL Document Versions Feedback DetailsAttachments/Public Comments AD Number: 2014-05-12 Document Type: AD Final Rules Docket Number: FAA-2013-0542 Subject Heading: Airworthiness Directives; The Boeing Company Airplanes Subject: Wings Status: Current Citation: (Federal Register Volume 79, Number 52 (Tuesday, March 18, 2014)) Citation Publish Date: 03/18/2014 Effective Date: 04/22/2014 Make: The Boeing Company Model: 737-100 Series | 737-200 Series | 737-200C Series | 737-300 Series | 737-400 Series | 737-500 Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: 2010-15-08 Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Automatic Zoom Actual Size Page Fit Page Width 50% 75% 100% 125%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 13 1 [Federal Register Volume 79, Number 52 (Tuesday, March 18, 2014)] [Rules and Regulations] [Pages 14977-14982] From the Federal Register Online via the Government Printing Office [www.gpo.gov] [FR Doc No: 2014-04819] –––––––––––––––––––––––––––––––––– DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2013-0542; Directorate Identifier 2011-NM-162-AD; Amendment 39-17785 AD 2014-05-12] RIN 2120-AA64 Airworthiness Directives; The Boeing Company Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. –––––––––––––––––––––––––––––––––– SUMMARY: We are superseding Airworthiness Directive (AD) 2010-15-08 for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. AD 2010-15-08 required repetitive inspections for discrepancies of each carriage spindle of the outboard mid-flaps; repetitive gap checks of the inboard and outboard carriages of the outboard mid-flaps to detect fractured carriage spindles; measuring to ensure that any new or serviceable carriage spindle meets minimum allowable diameter measurements taken at three locations; repetitive inspections, measurements, and overhaul of the carriage spindles; replacement of any carriage spindle when it has reached its maximum life limit; and corrective actions if necessary. This new AD requires reducing the life limit of the carriages, reducing the repetitive interval for certain inspections and gap checks for certain carriages. This new AD also adds an option, for certain replacements, of doing an inspection, and related investigative and corrective actions if necessary. This AD was prompted by a report of failure of both flap carriages. We are issuing this AD to detect and correct cracked, corroded, or fractured carriage spindles, which could lead to severe flap asymmetry, and could result in reduced control or loss of controllability of the airplane. DATES: This AD is effective April 22, 2014. The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of April 22, 2014. The Director of the Federal Register approved the incorporation by reference of certain other publications listed in this AD as of August 31, 2010 (75 FR 43803, July 27, 2010). ADDRESSES: 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; Internet https://www.myboeingfleet.com. You may view this referenced service information at the FAA, 2 Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425-227-1221. Examining the AD Docket You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2014-05-12 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 address for the Docket Office (phone: 800-647-5527) is Docket Management Facility, U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Nancy Marsh, Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue SW., Renton, WA 98057-3356; phone: (425) 917-6440; fax: (425) 917-6590; email: nancy.marsh@faa.gov. SUPPLEMENTARY INFORMATION: Discussion We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2010-15-08, Amendment 39-16374 (75 FR 43803, July 27, 2010). AD 2010-15-08 applied to all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. The NPRM published in the Federal Register on July 1, 2013 (78 FR 39193). The NPRM was prompted by a report of failure of both flap carriages. The NPRM proposed to continue to require repetitive inspections for discrepancies of each carriage spindle of the outboard mid-flaps; repetitive gap checks of the inboard and outboard carriages of the outboard mid-flaps to detect fractured carriage spindles; measuring to ensure that any new or serviceable carriage spindle meets minimum allowable diameter measurements taken at three locations; repetitive inspections, measurements, and overhaul of the carriage spindles; replacement of any carriage spindle when it has reached its maximum life limit; and corrective actions if necessary. The NPRM also proposed to require reducing the life limit of the carriages, reducing the repetitive interval for certain inspections and gap checks for certain carriages. The NPRM also proposed to add an option, for certain replacements, of doing an inspection, and related investigative and corrective actions if necessary. We are issuing this AD to detect and correct cracked, corroded, or fractured carriage spindles, which could lead to severe flap asymmetry, and could result in reduced control or loss of controllability of the airplane. Comments We gave the public the opportunity to participate in developing this AD. The following presents the comments received on the proposal (78 FR 39193, July 1, 2013) and the FAA's response to each comment. Request to Revise Note Boeing requested we revise note 1 to paragraph (m) of the NPRM (78 FR 39193, July 1, 2013) to read, ''. . . Boeing (737) Standard Overhaul Practices Manual (SOPM), Revision 25 or later.'' Boeing stated that as its production standard changes, the SOPM is revised each time the SOPM is updated. Boeing stated that a global alternative method of compliance (AMOC) is required each time the SOPM is revised and this generates AMOC activity that does not enhance fleet safety.
Document Text
Show stored source text (verify against official source)
AD Final Rules - 2014-05-12.pdf Copy URL Document Versions Feedback DetailsAttachments/Public Comments AD Number: 2014-05-12 Document Type: AD Final Rules Docket Number: FAA-2013-0542 Subject Heading: Airworthiness Directives; The Boeing Company Airplanes Subject: Wings Status: Current Citation: (Federal Register Volume 79, Number 52 (Tuesday, March 18, 2014)) Citation Publish Date: 03/18/2014 Effective Date: 04/22/2014 Make: The Boeing Company Model: 737-100 Series | 737-200 Series | 737-200C Series | 737-300 Series | 737-400 Series | 737-500 Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: 2010-15-08 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 13 1 [Federal Register Volume 79, Number 52 (Tuesday, March 18, 2014)] [Rules and Regulations] [Pages 14977-14982] From the Federal Register Online via the Government Printing Office [www.gpo.gov] [FR Doc No: 2014-04819] –––––––––––––––––––––––––––––––––– DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2013-0542; Directorate Identifier 2011-NM-162-AD; Amendment 39-17785 AD 2014-05-12] RIN 2120-AA64 Airworthiness Directives; The Boeing Company Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. –––––––––––––––––––––––––––––––––– SUMMARY: We are superseding Airworthiness Directive (AD) 2010-15-08 for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. AD 2010-15-08 required repetitive inspections for discrepancies of each carriage spindle of the outboard mid-flaps; repetitive gap checks of the inboard and outboard carriages of the outboard mid-flaps to detect fractured carriage spindles; measuring to ensure that any new or serviceable carriage spindle meets minimum allowable diameter measurements taken at three locations; repetitive inspections, measurements, and overhaul of the carriage spindles; replacement of any carriage spindle when it has reached its maximum life limit; and corrective actions if necessary. This new AD requires reducing the life limit of the carriages, reducing the repetitive interval for certain inspections and gap checks for certain carriages. This new AD also adds an option, for certain replacements, of doing an inspection, and related investigative and corrective actions if necessary. This AD was prompted by a report of failure of both flap carriages. We are issuing this AD to detect and correct cracked, corroded, or fractured carriage spindles, which could lead to severe flap asymmetry, and could result in reduced control or loss of controllability of the airplane. DATES: This AD is effective April 22, 2014. The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of April 22, 2014. The Director of the Federal Register approved the incorporation by reference of certain other publications listed in this AD as of August 31, 2010 (75 FR 43803, July 27, 2010). ADDRESSES: 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; Internet https://www.myboeingfleet.com. You may view this referenced service information at the FAA, 2 Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425-227-1221. Examining the AD Docket You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2014-05-12 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 address for the Docket Office (phone: 800-647-5527) is Docket Management Facility, U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Nancy Marsh, Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue SW., Renton, WA 98057-3356; phone: (425) 917-6440; fax: (425) 917-6590; email: nancy.marsh@faa.gov. SUPPLEMENTARY INFORMATION: Discussion We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2010-15-08, Amendment 39-16374 (75 FR 43803, July 27, 2010). AD 2010-15-08 applied to all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. The NPRM published in the Federal Register on July 1, 2013 (78 FR 39193). The NPRM was prompted by a report of failure of both flap carriages. The NPRM proposed to continue to require repetitive inspections for discrepancies of each carriage spindle of the outboard mid-flaps; repetitive gap checks of the inboard and outboard carriages of the outboard mid-flaps to detect fractured carriage spindles; measuring to ensure that any new or serviceable carriage spindle meets minimum allowable diameter measurements taken at three locations; repetitive inspections, measurements, and overhaul of the carriage spindles; replacement of any carriage spindle when it has reached its maximum life limit; and corrective actions if necessary. The NPRM also proposed to require reducing the life limit of the carriages, reducing the repetitive interval for certain inspections and gap checks for certain carriages. The NPRM also proposed to add an option, for certain replacements, of doing an inspection, and related investigative and corrective actions if necessary. We are issuing this AD to detect and correct cracked, corroded, or fractured carriage spindles, which could lead to severe flap asymmetry, and could result in reduced control or loss of controllability of the airplane. Comments We gave the public the opportunity to participate in developing this AD. The following presents the comments received on the proposal (78 FR 39193, July 1, 2013) and the FAA's response to each comment. Request to Revise Note Boeing requested we revise note 1 to paragraph (m) of the NPRM (78 FR 39193, July 1, 2013) to read, ''. . . Boeing (737) Standard Overhaul Practices Manual (SOPM), Revision 25 or later.'' Boeing stated that as its production standard changes, the SOPM is revised each time the SOPM is updated. Boeing stated that a global alternative method of compliance (AMOC) is required each time the SOPM is revised and this generates AMOC activity that does not enhance fleet safety.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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