Source: https://www.federalregister.gov/documents/2011/06/27/2011-15364/airworthiness-directives-bombardier-inc-model-dhc-8-400-series-airplanes
Timestamp: 2018-08-22 06:39:36
Document Index: 718267592

Matched Legal Cases: ['art 39', 'art 2', 'art 2', 'art 2', 'art 2', 'art 2', 'art 2', 'art 2', 'art 2']

76 FR 37258
37258-37261 (4 pages)
Amendment 39-16729
AD 2011-13-06
https://www.federalregister.gov/d/2011-15364 https://www.federalregister.gov/d/2011-15364
The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of August 1, 2011.
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That NPRM was published in the Federal Register on February 7, 2011 (76 FR 6584). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI states:
Modsum 4-126366, “Fuel Tank System and Fuel Indication—Wiring Identification, Segregation and Installation (High Level Sensor and Fuel Quantity Indication)—Retrofit.” The retrofit includes adding new wiring with protective sleeving, reworking existing wiring, labeling and separating the fuel quantity indicating (FQI) wiring and high level sensor wiring from other wiring, enhancing the electro-magnetic interference (EMI) shielding of the wiring connected to the vent valve position switch, and installing additional provisions (bulkhead brackets) for wiring clips in the center fuselage.
We have reviewed the MCAI and related service information and, in Start Printed Page 37259general, agree with their substance. But we might have found it necessary to use different words from those in the MCAI to ensure the AD is clear for U.S. operators and is enforceable. In making these changes, we do not intend to differ substantively from the information provided in the MCAI and related service information.
We estimate that this AD will affect 67 products of U.S. registry. We also estimate that it will take about 526 work-hours per product to comply with the basic requirements of this AD. The average labor rate is $85 per work-hour. Required parts will cost about $37,696 per product. Where the service information lists required parts costs that are covered under warranty, we have assumed that there will be no charge for these parts. As we do not control warranty coverage for affected parties, some parties may incur costs higher than estimated here. Based on these figures, we estimate the cost of this AD to the U.S. operators to be $5,521,202, or $82,406 per product.
2011-13-06 Bombardier, Inc.: Amendment 39-16729. Docket No. FAA-2011-0036; Directorate Identifier 2010-NM-230-AD.
(h) For airplanes having S/Ns 4003, 4004, 4006, and 4008 through 4118 inclusive, do Bombardier Fuel System Limitation (FSL) Task 284000-417 (Functional Check of the Fuel Tank Components and Plumbing Lines for Electrical Bonding) contained in Section 4-1, Fuel System Limitations, of Part 2—Airworthiness Limitation Items, Revision 5, dated April 21, 2010, of Bombardier Q400 Dash 8 Maintenance Requirements Manual, PSM 1-84-7, at the applicable times specified in paragraphs (h)(1) and (h)(2) of Start Printed Page 37260this AD. Where the task specifies contacting Bombardier for technical assistance, this AD requires repairs/rework actions in accordance with a method approved by the Manager, New York Aircraft Certification Office (ACO), FAA, or Transport Canada Civil Aviation (TCCA) (or its delegated agent).
(1) Except as provided in paragraphs (h)(1)(i) and (h)(1)(ii) of this AD, for airplanes that have incorporated either Bombardier Modsum 4-126330 or 4-901425 prior to the effective date of this AD: Do Bombardier Task 284000-417 in Section 4-1, Fuel System Limitations, of Part 2—Airworthiness Limitation Items, Revision 5, dated April 21, 2010, of Bombardier Q400 Dash 8 Maintenance Requirements Manual, PSM 1-84-7, within 6,000 flight hours after the effective date of this AD.
(i) Airplanes on which Bombardier Task 284000-417 in Section 4-1, Fuel System Limitations, of Part 2—Airworthiness Limitation Items, Revision 5, dated April 21, 2010, of Bombardier Q400 Dash 8 Maintenance Requirements Manual, PSM 1-84-7, was successfully completed after incorporation of Bombardier Modsum 4-126330 or 4-901425 do not need to comply with the requirements of paragraph (h) of this AD.
(2) For airplanes on which neither Bombardier Modsum 4-126330 nor 4-901425 were incorporated before the effective date of this AD: Do Bombardier Task 284000-417 in Section 4-1, Fuel System Limitations, of Part 2—Airworthiness Limitation Items, Revision 5, dated April 21, 2010, of Bombardier Q400 Dash 8 Maintenance Requirements Manual, PSM 1-84-7, upon completion of the incorporation of Bombardier Modsum 4-126330 and, if applicable, Bombardier Modsum 4-901425.
(j) For airplanes having S/Ns 4003, 4004, 4006, and 4008 through 4118 inclusive, on which the date of issuance of the original Canadian standard airworthiness certificate or the date of issuance of the original Canadian export certificate of airworthiness is on or after September 21, 2005: Within 12,000 flight hours after the effective date of this AD, incorporate Bombardier Modsum 4-126370, “Fuel Tank System—Enhance Protective Covering for Electrical Cable Assembly,” by doing all the applicable actions in the Accomplishment Instructions of Bombardier Service Bulletin 84-28-03, Revision C, dated May 15, 2009.
This AD differs from the MCAI and/or service information as follows: The MCAI specifies to do Bombardier Task 284000-417 in Section 4-1, Fuel System Limitations, of Part 2—Airworthiness Limitation Items, Revision 5, dated April 21, 2010, of Bombardier Q400 Dash 8 Maintenance Requirements Manual, PSM 1-84-7, but does not specify what to do if the functional check finds that measured resistance exceeds the specified values. This AD requires contacting the Manager, New York ACO, FAA, or TCCA (or its delegated agent) for repair/rework instructions.
(q) You must use Bombardier Task 284000-417 in Section 4-1, Fuel System Limitations, of Part 2—Airworthiness Limitation Items, Revision 5, dated April 21, 2010, of Bombardier Q400 Dash 8 Maintenance Requirements Manual, PSM 1-84-7, and the service information contained in Table 2 of this AD, as applicable, to do the actions required by this AD, unless the AD specifies otherwise. The revision level for Bombardier Task 284000-417 in Section 4-1, Fuel System Limitations, of Part 2—Airworthiness Limitation Items, Revision 5, dated April 21, 2010, of Bombardier Q400 Dash 8 Maintenance Requirements Manual, PSM 1-84-7, is specified only on the title page and page 1 of the record of Revisions of that document. Page 4 of Section 4-1, Fuel System Limitations, of Part 2—Airworthiness Limitation Items, Revision 5, dated April 21, 2010, of Bombardier Q400 Dash 8 Maintenance Requirements Manual, PSM 1-84-7, is not listed in the Table of Contents of that document.
Table 2—Service Bulletins Incorporated by Reference
Bombardier Service Bulletin 84-28-03 C May 15, 2009
Bombardier Service Bulletin 84-28-04 B October 21, 2009
Bombardier Service Bulletin 84-28-05 Original June 28, 2006
Bombardier Service Bulletin 84-28-07 Original August 1, 2008
Bombardier Service Bulletin 84-57-09 B September 3, 2008
[FR Doc. 2011-15364 Filed 6-24-11; 8:45 am]