Source: https://www.federalregister.gov/documents/2014/10/03/2014-23377/airworthiness-directives-the-boeing-company-airplanes
Timestamp: 2018-03-22 09:04:54
Document Index: 289734178

Matched Legal Cases: ['art 39', '§\u200939', 'art 2', 'art 3', 'art 4', 'art 7', 'art 8', 'art 7', 'art 8', 'art 9']

79 FR 59633
59633-59635 (3 pages)
Docket No. FAA-2014-0283
Directorate Identifier 2012-NM-183-AD
Amendment 39-17980
AD 2014-20-07
FAA-2014-0283
2012-NM-183-AD The Boeing Company Model 747?200C and ?200F series airplanes
(g) Inspection and Replacement for the Upper Chords of the Upper Deck Floor Beam of Section 41
(h) Post-Replacement Inspections and Replacements for the Upper Chords of the Upper Deck Floor Beam of Section 41
(i) Inspection and Replacement for the Upper Chords of the Upper Deck Floor Beam of Section 42
(j) Post-Replacement Inspections and Replacement for the Upper Chords of the Upper Deck Floor Beam of Section 42
(l) Exception to Service Information Specifications
(n) Special Flight Permit
https://www.federalregister.gov/d/2014-23377 https://www.federalregister.gov/d/2014-23377
We are superseding Airworthiness Directive (AD) 2010-03-05 for all the Boeing Company Model 747-200C and -200F series airplanes. AD 2010-03-05 required, for the upper chords of the upper deck floor beam of section 41, an inspection for cracking of certain fastener holes, and corrective action if necessary; and repetitive replacements of the upper chords, straps (or angles), and radius fillers of certain upper deck floor beams and, for any replacement that is done, inspections for cracking, and corrective actions if necessary. This new AD adds repetitive inspections of the upper chords of the upper deck floor beam of Section 42, repetitive replacements of the upper chords, post-replacement inspections, and corrective actions if necessary. This new AD also adds post-replacement inspections for section 41 and reduces certain compliance times. This AD was prompted by a determination that the upper deck floor beams are subject to widespread fatigue damage (WFD), the existing inspection program is not sufficient to maintain an acceptable level of safety, and the upper chords of the upper deck floor beam of section 42 are subject to the unsafe condition. We are issuing this AD to detect and correct cracking of the upper chords and straps (or angles) of the floor beams, which could lead to failure of the floor beams and consequent loss of controllability, rapid decompression, and loss of structural integrity of the airplane.
You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2014-0283; 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.
Roger Caldwell, Aerospace Engineer, Technical Operations Center, ANM-100D, FAA, Denver Aircraft Certification Office (ACO), 26805 East 68th Avenue, Room 214, Denver, CO 80249; phone: 303-342-1086; fax: 303-342-1088; email: roger.caldwell@faa.gov.
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2010-03-05, Amendment 39-16188 (75 FR 5692, February 4, 2010). AD 2010-03-05 applied to all The Boeing Company Model 747-200C and -200F series airplanes. The NPRM published in the Federal Register on May 28, 2014 (79 FR 30486). The NPRM was prompted by a determination that the upper deck floor beams are subject to WFD, the existing inspection program is not sufficient to maintain an acceptable level of safety, and the upper chords of the upper deck floor beams in section 42 are subject to the identified unsafe condition. The NPRM proposed to add post-replacement inspections for section 41 and reduce certain compliance times. The NPRM also proposed to add repetitive inspections of the upper chords of the upper deck floor beams in section 42, repetitive replacements of the upper chords, post-replacement inspections, and corrective action if necessary. We are issuing this AD to detect and correct cracking of the upper chords and straps (or angles) of the floor beams, which could lead to failure of the floor beams and consequent loss of controllability, rapid decompression, and loss of structural integrity of the airplane.
We gave the public the opportunity to participate in developing this AD. We have considered the comment received. Boeing stated that it concurs with the contents of the NPRM (79 FR 30486, May 28, 2014).
Are consistent with the intent that was proposed in the NPRM (79 FR 30486, May 28, 2014) for correcting the unsafe condition; and
Do not add any additional burden upon the public than was already proposed in the NPRM (79 FR 30486, May 28, 2014).
We estimate that this AD affects 25 airplanes of U.S. registry.Start Printed Page 59634
Retained inspection and replacement (AD 2010-03-05, Amendment 39-16188 (75 FR 5692, February 4, 2010)) 663 work-hours × $85 per hour = $56,355 $0 $56,355 per inspection/replacement cycle $1,408,875 per inspection/replacement cycle.
New post-replacement inspections—section 41 Up to 525 work-hours × $85 per hour = $44,625 1 $0 $44,625 Up to $1,115,625.
New inspections, replacement, and post-replacement inspections—section 42 Up to 525 work-hours × $85 per hour = $44,625 1 Manufacturer has not provided cost of parts $44,625 Up to $1,115,625.
1 Includes time to manufacture parts.
2. The FAA amends § 39.13 by removing Airworthiness Directive (AD) 2010-03-05, Amendment 39-16188 ( 75 FR 5692, February 4, 2010), and adding the following new AD:
2014-20-07 The Boeing Company: Amendment 39-17980; Docket No. FAA-2014-0283; Directorate Identifier 2012-NM-183-AD.
This AD replaces AD 2010-03-05, Amendment 39-16188 (75 FR 5692, February 4, 2010).
This AD applies to all The Boeing Company Model 747-200C and -200F series airplanes, certificated in any category.
This AD was prompted by a determination that the upper deck floor beams are subject to widespread fatigue damage (WFD), the existing inspection program is not sufficient to maintain an acceptable level of safety, and upper chords of the upper deck floor beam of section 42 are subject to the unsafe condition. We are issuing this AD to detect and correct cracking of the upper chords and straps (or angles) of the floor beams, which could lead to failure of the floor beams and consequent loss of controllability, rapid decompression, and loss of structural integrity of the airplane.
At the applicable time specified in Table 1 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012: At stations (STA) 340 through STA 440, STA 500, and STA 520, do an open-hole high frequency eddy current (HFEC) inspection at all accessed fastener holes to detect cracking; and install new upper deck floor beam upper chords, straps, angles, and radius fillers; in accordance with Part 2 and Part 3 of the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012.
At the applicable time specified in Table 2 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012; or within 1,500 flight cycles after March 11, 2010 (the effective date of AD 2010-03-05, Amendment 39-16188 (75 FR 5692, February 4, 2010)); whichever occurs later: Do detailed and HFEC inspections to detect cracking of the replaced upper deck floor beam chords, the floor panel attachment holes, and the permanent fastener locations of the replaced upper deck floor beam chords, in accordance Start Printed Page 59635with Part 4 of the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012. If no cracking is found, do the actions specified in paragraphs (h)(1) and (h)(2) of this AD.
(1) Do the detailed and HFEC inspections of the replaced upper deck floor beam chords within 3,000 flight cycles after the most recent inspection, or within 300 flight cycles after the effective date of this AD, whichever occurs later, and repeat thereafter at the applicable time specified in Table 2 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012.
(2) Do the open-hole HFEC inspection and chord replacement required by paragraph (g) of this AD at the applicable time specified in Table 2 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012, or within 240 flight cycles after the effective date of this AD, whichever occurs later. Repeat the inspections and replacement specified in paragraph (h) of this AD at the applicable time specified in Table 2 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012.
At the applicable time specified in Tables 3 and 4 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012, except as required by paragraph (l) of this AD: Do the actions specified in paragraph (i)(1) or (i)(2) of this AD as applicable.
(1) At STA 540 through STA 740 for Group 1 airplanes identified in Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012: Do an open-hole HFEC inspection to detect cracking, and install new upper deck floor beam upper chord replacements, in accordance with Part 7 and Part 8 of the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012.
(2) At STA 540 through STA 780 for Group 2 airplanes identified in Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012: Do an open-hole HFEC inspection to detect cracking, and install new upper deck floor beam upper chord replacements, in accordance with Part 7 and Part 8 of the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012.
At the applicable time specified in Table 5 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012; or within 1,500 flight cycles after March 11, 2010 (the effective date of AD 2010-03-05, Amendment 39-16188 (75 FR 5692, February 4, 2010)); whichever occurs later: Do HFEC inspections to detect cracking of the replaced upper deck floor beam chords, in accordance with Part 9 of the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012. If no crack is found, do the actions specified in paragraphs (j)(1) and (j)(2) of this AD.
(1) Repeat the HFEC inspections of the replaced upper deck floor beam chords thereafter at the applicable time specified Table 5 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012.
(2) Do the open-hole HFEC inspection and chord replacement required by paragraph (i) of this AD at the applicable time specified in Table 5 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012. Repeat the inspections and replacement, as specified in paragraph (j) of this AD, at the applicable time specified in Table 5 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012.
If any cracking is found during any inspection required by this AD, before further flight, repair using a method approved in accordance with the procedures specified in paragraph (o) of this AD.
Where Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012, specifies a compliance time “after the revision 1 date on this service bulletin,” this AD requires compliance within the specified compliance time “after the effective date of this AD.”
This paragraph provides credit for the installation of floor beam replacements required by this AD, if those actions were performed before the effective date of this AD using Boeing Alert Service Bulletin 747-53A2696, dated October 16, 2008. (This service bulletin was incorporated by reference in AD 2010-03-05, Amendment 39-16188 (75 FR 5692, February 4, 2010)).
(1) The Manager, Seattle Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the ACO, send it to the attention of the persons identified in paragraph (p)(1) of this AD. Information may be emailed to: 9-ANM-Seattle-ACO-AMOC-Requests@faa.gov.
(1) For more information about this AD, contact Nathan Weigand, Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue SW., Renton, Washington 98057-3356; phone: 425-917-6428; fax: 425-917-6590; email: nathan.p.weigand@faa.gov.
(i) Boeing Alert Service Bulletin 747-53A2696, Revision 1, dated April 12, 2012.
[FR Doc. 2014-23377 Filed 10-2-14; 8:45 am]