Federal Aviation Administration (FAA), Department of Transportation (DOT).
Final rule.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
The digital engine indicating system (DEI–NT) and associated control unit must get their latest software update. It has been found out in operation, that some combinations of system states while pressing switches can cause electrical damages to the system. A new software update is mandated to correct this deficiency and to incorporate additional safety functions to the system.
We are issuing this AD to require actions to correct the unsafe condition on these products.
This AD becomes effective October 26, 2007.
On October 26, 2007, the Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD.
You may examine the AD docket on the Internet at
Greg Davison, Glider Program Manager, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329–4130; fax: (816) 329–4090.
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
The digital engine ind icating system (DEI–NT) and associated control unit must get their latest software update. It has been found out in operation, that some combinations of system states while pressing switches can cause electrical damages to the system. A new software update is mandated to correct this deficiency and to incorporate additional safety functions to the system.
As a result, the Flight and Maintenance Manuals need to be revised, specifically regarding the stall warning.
You may obtain further information by examining the MCAI in the AD docket.
We gave the public the opportunity to participate in developing this AD. We received no comments on the NPRM or on the determination of the cost to the public.
We reviewed the available data and determined that air safety and the public interest require adopting the AD as proposed.
We have reviewed the MCAI and related service information and, in general, 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 might also have required different actions in this AD from those in the MCAI in order to follow FAA policies. Any such differences are highlighted in a NOTE within the AD.
We estimate that this AD will affect 1 product of U.S. registry. We also estimate that it will take about 1 work-hour per product to comply with basic requirements of this AD. The average labor rate is $80 per work-hour.
Based on these figures, we estimate the cost of this AD to the U.S. operators to be $80 or $80 per product.
Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. “Subtitle VII: Aviation Programs,” describes in more detail the scope of the Agency's authority.
We are issuing this rulemaking under the authority described in “Subtitle VII, Part A, Subpart III, Section 44701: General requirements.” Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.
We determined that this AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify this AD:
(1) Is not a “significant regulatory action” under Executive Order 12866;
(2) Is not a “significant rule” under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and
(3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.
We prepared a regulatory evaluation of the estimated costs to comply with this AD and placed it in the AD Docket.
You may examine the AD docket on the Internet at
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
49 U.S.C. 106(g), 40113, 44701.
(a) This airworthiness directive (AD) becomes effective October 26, 2007.
(b) None.
(c) This AD applies to DG–1000T gliders, all serial numbers, certificated in any category.
(d) Air Transport Association of America (ATA) Code 77: Engine Indicating.
(e) The mandatory continuing airworthiness information (MCAI) states:
The digital engine indicating system (DEI–NT) and associated control unit must get their latest software update. It has been found out in operation, that some combinations of system states while pressing switches can cause electrical damages to the system. A new software update is mandated to correct this deficiency and to incorporate additional safety functions to the system.
As a result, the Flight and Maintenance Manuals need to be revised, specifically regarding the stall warning.
(f) Within the next 60 days after October 26, 2007 (the effective day of this AD), unless already done, do the following actions:
(1) Replace the Digital Indicating System (DEI–NT) unit with an updated unit that incorporates software version V1.5, and replace the control unit with an updated unit that incorporates software version V1.9 following DG–Flugzeugbau GmbH Technical Note No. 1000/09, EASA approved December 12, 2006.
(2) Insert the new Flight Manual pages 0.1, 0.5, 7.14, and 7.15 and the new Maintenance Manual pages 0.1, 0.3, 0.6, 0.10, 1.22, and 1.23, issued October 2006 marked with TN1000/09, and add Diagram 15a into your maintenance program (maintenance manual) following DG–Flugzeugbau GmbH Technical Note No. 1000/09, EASA approved December 12, 2006.
(3) Prior to further flight after the action required by paragraph (f)(1) of this AD, do not install a DEI–NT or control unit in any DG–1000T airplane, unless it incorporates the software versions required in this AD.
The referenced DG–Flugzeugbau GmbH Technical Note No. 1000/09, EASA approved December 12, 2006, also includes instructions for replacement of the fuel cock, which is not required by this AD.
As specified in the flight manual, the glider can only be operated in the non-powered configuration without the DEI–NT installed. Engine operation is not possible.
This AD differs from the MCAI as follows: No differences.
(g) The following provisions also apply to this AD:
(1)
(2)
(3)
(h) Refer to MCAI European Aviation Safety Agency (EASA) AD No. 2007–0040, dated February 23, 2007; and DG–Flugzeugbau GmbH Technical Note No. 1000/09, EASA approved December 12, 2006, for related information.
(i)You must use DG–Flugzeugbau GmbH Technical Note No. 1000/09, EASA approved December 12, 2006, to do the actions required by this AD, unless the AD specifies otherwise.
(1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) For service information identified in this AD, contact DG–Flugzeugbau GmbH, Wilhelm Dirks, Chief of Design; Otto–Lilienthal–Weg 2, 76646 Bruchsal, Germany; telephone: +49 7251 3020 140; fax: +49 7251 3020 149; e-mail:
(3) You may review copies at the FAA, Central Region, Office of the Regional Counsel, 901 Locust, Room 506, Kansas City, Missouri 64106; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202–741–6030, or go to: