Source: https://www.federalregister.gov/documents/2013/04/11/2013-08453/airworthiness-directives-bombardier-inc-airplanes
Timestamp: 2017-09-22 00:18:40
Document Index: 138507380

Matched Legal Cases: ['art 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1']

78 FR 21573
21573-21576 (4 pages)
Docket No. FAA-2013-0298
Directorate Identifier 2012-NM-175-AD
2013-08453
FAA-2013-0298
2012-NM-175-AD Bombardier, Inc. Model DHC-8-102, -103, -106, -201, -202, -301, -311, and -315 airplanes
(h) Initial Task Compliance Time
https://www.federalregister.gov/d/2013-08453 https://www.federalregister.gov/d/2013-08453
We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc. Model DHC-8-102, -103, -106, -201, -202, -301, -311, and -315 airplanes. This proposed AD was prompted by reports of dual alternating current (AC) generator failure during flight. The failure was attributed to wire chafing along the wing lower flap shroud. This proposed AD would require revising the maintenance program to incorporate certain tasks for the electrical wiring interconnection system inspection program. We are proposing this AD to prevent failure of both AC generators due to wire chafing, which could result in loss of power to the anti-icing heaters for the elevator horn, engine inlet, and propeller, and consequent ice accumulation in these areas, which could adversely affect the controllability of the airplane.
Fax: 202-493-2251.Start Printed Page 21574
Assata Dessaline, Aerospace Engineer, Avionics and Services Branch, ANE-172, FAA, New York Aircraft Certification Office (ACO), 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228-7301; fax (516) 794-5531.
We invite you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under the ADDRESSES section. Include “Docket No. FAA-2013-0298; Directorate Identifier 2012-NM-175-AD” at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD because of those comments.
Transport Canada Civil Aviation (TCCA), which is the aviation authority for Canada, has issued Canadian Airworthiness Directive CF-2012-25, dated August 28, 2012 (referred to after this as “the MCAI”), to correct an unsafe condition for the specified products. The MCAI states:
There have been several reported occurrences of dual [alternating current] AC Generator failure during flight, resulting in the loss of the variable frequency AC System.
Investigations revealed wire chafing along the wing lower flap shroud due to sagging wiring harnesses resting on the support structure, missing teflon tape at the fairlead locations, and missing grommets. Chafed wires may lead to arcing, local overheating, and AC generator failure. The AC generators provide power to the anti-icing heaters, including elevator horn heater, engine inlet heater and propeller heater. Failure of both AC generators would result in the loss of these systems and poses a safety concern.
This [Canadian] AD mandates the inspection and rectification of the wiring harness installations along the centre wing lower flap shroud.
Required actions include revising the maintenance program by incorporating electrical wiring interconnection system inspection program tasks.
de Havilland Dash 8 Series 100 Maintenance Task Card 531X1, Revision 25, in Section 8, Electrical Wiring Interconnection System Inspection Program, of Part 1, Maintenance Review Board Report, of the Bombardier DHC-8 Maintenance Program Manual PSM 1-8-7, dated February 20, 2012.
de Havilland Dash 8 Series 100 Maintenance Task Card 631X1, Revision 25, in Section 8, Electrical Wiring Interconnection System Inspection Program, of Part 1, Maintenance Review Board Report, of the Bombardier DHC-8 Maintenance Program Manual PSM 1-8-7, dated February 20, 2012.
de Havilland Dash 8 Series 200 Maintenance Task Card 531X1, Revision 16, in Section 8, Electrical Wiring Interconnection System Inspection Program, of Part 1, Maintenance Review Board Report, of the Bombardier DHC-8 Maintenance Program Manual PSM 1-82-7, dated February 20, 2012.
de Havilland Dash 8 Series 200 Maintenance Task Card 631X1, Revision 16, in Section 8, Electrical Wiring Interconnection System Inspection Program, of Part 1, Maintenance Review Board Report, of the Bombardier DHC-8 Maintenance Program Manual PSM 1-82-7, dated February 20, 2012.
de Havilland Dash 8 Series 300 Maintenance Task Card 531X1, Revision 25, in Section 8, Electrical Wiring Interconnection System Inspection Program, of Part 1, Maintenance Review Board Report, of the Bombardier DHC-8 Maintenance Program Manual PSM 1-83-7, dated February 20, 2012.
de Havilland Dash 8 Series 300 Maintenance Task Card 631X1, Revision 25, in Section 8, Electrical Wiring Interconnection System Inspection Program, of Part 1, Maintenance Review Board Report, of the Bombardier DHC-8 Maintenance Program Manual, PSM 1-83-7, dated February 20, 2012.
This proposed AD requires revisions to certain operator maintenance documents to include new inspections. Compliance with these inspections is required by section 91.403(c) of the Federal Aviation Regulations (14 CFR 91.403(c)). For airplances that have been previously modified, altered, or repaired in the areas addressed by these inspections, an operator might not be able to accomplish the inspections described in the revisions. In this situation to comply with 14 CFR 91.403(c), the operator must request approval of an alternative method of compliance (AMOC) in accordance with the provisions of paragraph (j)(1) of this proposed AD. The request should include a description of changes to the required inspections that will ensure the continued damage tolerance of the affected structure.
Based on the service information, we estimate that this proposed AD would affect about 89 products of U.S. registry. Start Printed Page 21575We also estimate that it would take about 1 work-hour per product to comply with the basic requirements of this proposed AD. The average labor rate is $85 per work-hour. Based on these figures, we estimate the cost of the proposed AD on U.S. operators to be $7,565, or $85 per product.
Bombardier, Inc.: Docket No. FAA-2013-0298; Directorate Identifier 2012-NM-175-AD.
This AD applies to Bombardier, Inc. Model DHC-8-102, -103, -106, -201, -202, -301, -311, and -315 airplanes, certificated in any category, serial numbers 003 and subsequent.
This AD was prompted by reports of dual alternating current (AC) generator failure during flight. The failure was attributed to wire chafing along the wing lower flap shroud. We are issuing this AD to prevent failure of both AC generators due to wire chafing, which could result in loss of power to the anti-icing heaters for the elevator horn, engine inlet, and propeller, and consequent ice accumulation in these areas, which could adversely affect the controllability of the airplane.
Within 30 days after the effective date of this AD: Revise the airplane maintenance program by incorporating de Havilland Dash 8 Maintenance Task Cards 531X1 and 631X1, General visual inspection of the wiring and associated electrical wiring interconnection system (EWIS), in Section 8, Electrical Wiring Inspection Program, of Part 1, Maintenance Review Board Report into the applicable maintenance program manual specified in paragraphs (g)(1), (g)(2), and (g)(3) of this AD.
(1) For Model DHC-8-100 series airplanes: Bombardier DHC-8 Maintenance Program Manual PSM 1-8-7, Revision 25, dated February 20, 2012.
(2) For Model DHC-8-200 series airplanes: Bombardier DHC-8 Maintenance Program Manual PSM 1-82-7, Revision 16, dated February 20, 2012.
(3) For Model DHC-8-300 series airplanes: Bombardier DHC-8 Maintenance Program Manual PSM 1-83-7, Revision 25, dated February 20, 2012.
The initial compliance time for the tasks specified in the maintenance task cards specified in paragraph (g) of this AD is at the applicable time specified in paragraph (h)(1) or (h)(2) of this AD.
(1) For airplanes with 45,000 total flight hours or more as of the effective date of this AD: Within 1,000 flight hours after the effective date of this AD.
(2) For airplanes with less than 45,000 total flight hours as of the effective date of this AD: Within 6,000 flight hours after the effective date of this AD, but not to exceed 46,000 total flight hours.
After accomplishing the revisions required by paragraph (g) of this AD, no alternative actions (e.g., inspections) or intervals may be used, unless the actions and intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (j)(1) of this AD.
(1) Refer to MCAI Canadian Airworthiness Directive CF-2012-25, dated August 28, 2012, and the service information specified in paragraphs (k)(1)(i) through (k)(1)(vi) of this AD, for related information.Start Printed Page 21576
(i) de Havilland Dash 8 Series 100 Maintenance Task Card 531X1, in Section 8, Electrical Wiring Interconnection System Inspection Program, of Part 1, Maintenance Review Board Report, of the Bombardier DHC-8 Maintenance Program Manual PSM 1-8-7, Revision 25, dated February 20, 2012.
(ii) de Havilland Dash 8 Series 100 Maintenance Task Card 631X1, in Section 8, Electrical Wiring Interconnection System Inspection Program, of Part 1, Maintenance Review Board Report, of the Bombardier DHC-8 Maintenance Program Manual PSM 1-8-7, Revision 25, dated February 20, 2012.
(iii) de Havilland Dash 8 Series 200 Maintenance Task Card 531X1, in Section 8, Electrical Wiring Interconnection System Inspection Program, of Part 1, Maintenance Review Board Report, of the Bombardier DHC-8 Maintenance Program Manual PSM 1-82-7, Revision 16, dated February 20, 2012.
(iv) de Havilland Dash 8 Series 200 Maintenance Task Card 631X1, in Section 8, Electrical Wiring Interconnection System Inspection Program, of Part 1, Maintenance Review Board Report, of the Bombardier DHC-8 Maintenance Program Manual PSM 1-82-7, Revision 16, dated February 20, 2012.
(v) de Havilland Dash 8 Series 300 Maintenance Task Card 531X1, in Section 8, Electrical Wiring Interconnection System Inspection Program, of Part 1, Maintenance Review Board Report, of the Bombardier DHC-8 Maintenance Program Manual PSM 1 83-7, Revision 25, dated February 20, 2012.
(vi) de Havilland Dash 8 Series 300 Maintenance Task Card 631X1, in Section 8, Electrical Wiring Interconnection System Inspection Program, of Part 1, Maintenance Review Board Report, of the Bombardier DHC-8 Maintenance Program Manual, PSM 1-83-7, Revision 25, dated February 20, 2012.
[FR Doc. 2013-08453 Filed 4-10-13; 8:45 am]