Daily Rules, Proposed Rules, and Notices of the Federal Government
* Government-wide rulemaking Web site: Go to
* Mail: Docket Management Facility; U.S. Department of Transportation, 400 Seventh Street, SW., Nassif Building, room PL-401, Washington, DC 20590.
* Fax: (202) 493-2251.
* Hand delivery: room PL-401 on the plaza level of the Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays.
You can examine the contents of this AD docket on the Internet at
On July 2, 2001, the FAA issued AD 2001-14-08, amendment 39-12319 (66 FR 36441, July 12, 2001), which applies to certain McDonnell Douglas Model DC-10 series airplanes, Model MD-10 series airplanes, and Model MD-11 series airplanes. That AD requires repetitive inspections (at intervals not to exceed 6,000 flight hours) of the numbers 1 and 2 electric motors of the auxiliary hydraulic pump for electrical resistance, continuity, mechanical rotation, and associated wiring resistance/voltage; and corrective actions, if necessary. That action was prompted by reports that, during ground operations or when powered in flight by the air driven generator, the electric motors of the auxiliary hydraulic pump and associated motor feeder cables failed. The actions required by that AD are intended to prevent various failures of electric motors of the auxiliary hydraulic pump and associated wiring, which could result in fire at the auxiliary hydraulic pump and consequent damage to the adjacent electrical equipment and/or structure.
A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to add a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-10-10, DC-10-10F, DC-10-15, DC-10-30, DC-10-30F (KC-10A, KDC-10), DC-10-40, and DC-10-40F airplanes; and Model MD-10-10F and MD-10-30F airplanes, was published in the
Since the issuance of AD 2001-14-08, we also issued AD 2004-05-20, amendment 39-13515 (69 FR 11504, March 11, 2004), applicable to certain McDonnell Douglas Model DC-10-10, DC-10-10F, DC-10-15, DC-10-30, DC-10-30F (KC-10A and KDC-10), DC-10-40, and DC-10-40F airplanes; Model MD-10-10F and MD-10-30F airplanes; and Model MD-11 and MD-11F airplanes. That AD requires modification of the installation wiring for the electric motor operated auxiliary hydraulic pumps in the right wheel well area of the main landing gear, and repetitive inspections (at intervals not to exceed 2,500 flight hours) of the numbers 1 and 2 electric motors of the auxiliary hydraulic pumps for electrical resistance, continuity, mechanical rotation, and associated airplane wiring resistance/voltage; and corrective actions if necessary. That action was
The repetitive inspections required by AD 2004-05-20 and proposed in NPRM, Docket 2003-NM-119-AD, are identical to those in AD 2001-14-08, but at different intervals. Accomplishment of the modification and the 2,500 flight-hour inspections requirements of AD 2004-05-20 adequately addresses the identified unsafe condition.
Upon further consideration, we have determined that we need to rescind AD 2001-14-08 to prevent operators from performing duplicate actions.
Since this action rescinds a requirement to perform a duplicate action, it has no adverse economic impact and imposes no additional burden on any person. Therefore, providing notice and opportunity for public comment is unnecessary before this AD is issued, and this AD may be made effective in less than 30 days after it is published in the
For the reasons discussed previously, we are also planning to withdraw NPRM, Docket 2003-NM-119-AD, in a separate rulemaking action.
Although this is a final rule that was not preceded by notice and an opportunity for public comment, we invite you to submit any written relevant data, views, or arguments regarding this AD. Send your comments to an address listed under
We will post all comments we receive, without change, to
We are reviewing the writing style we currently use in regulatory documents. We are interested in your comments on whether the style of this document is clear, and your suggestions to improve the clarity of our communications with you. You can get more information about plain language at
49 U.S.C. 106(g), 40113, 44701.
(a) This AD becomes effective September 1, 2004.
(b) This action rescinds AD 2001-14-08, Amendment 39-12319.
(c) This action applies to Model DC-10 and MD-10 series airplanes, as listed in McDonnell Douglas Alert Service Bulletin DC10-29A142, Revision 01, dated October 21, 1999; and Model MD-11 series airplanes, as listed in McDonnell Douglas Alert Service Bulletin MD11-29A057, Revision 01, dated October 21, 1999; certificated in any category.