AD 2001-14-08 R1

AD Final Rules - 011408R1.pdf
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AD Number:
2001-14-08 R1
Document Type:
AD Final Rules
Docket Number:
FAA-2004-18978
Subject Heading:
Airworthiness Directives; McDonnell Douglas Model DC-10 Series Airplanes, Model MD-10 Series Airplan...Show more
Subject:
Auxiliary hydraulic pump
Status:
Current
Citation:
(Federal Register: September 1, 2004 (Volume 69, Number 169))
Citation Publish Date:
09/01/2004
Effective Date:
09/01/2004
Make:
McDonnell Douglas Corporation
Model:
DC-10 Series (all) | MD-10-10F | MD-10-30F
Product Type:
Aircraft
Product Subtype:
Large Airplane
Affected AD:
Superseded AD:
2001-14-08
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
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[Federal Register: September 1, 2004 (Volume 69, Number 169)]


[Rules and Regulations]


[Page 53336-53337]


From the Federal Register Online via GPO Access [wais.access.gpo.gov]


[DOCID:fr01se04-3]


–––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. FAA-2004-18978; Directorate Identifier 2004-NM-127-AD; Amendment 39-13780;


AD 2001-14-08 R1]


RIN 2120-AA64


Airworthiness Directives; McDonnell Douglas Model DC-10 Series Airplanes, Model MD-10


Series Airplanes, and Model MD-11 Series Airplanes


AGENCY:
 
Federal Aviation Administration, DOT.


ACTION:
 
Final rule; rescission.


–––––––––––––––––––––––––––––––––––


SUMMARY:
 
The FAA is rescinding an existing airworthiness directive (AD) that 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 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. We issued that AD 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. Since we issued that AD, we have determined that the inspection requirements are


identical to the inspection requirements of another existing AD.


DATES:
 
Effective September 1, 2004.


ADDRESSES:
 
Use one of the following addresses to submit comments on this rescission.


•
 
DOT Docket Web site: Go to
 
http://dms.dot.gov
 
and follow the instructions for sending your


comments electronically.


•
 
Government-wide rulemaking Web site: Go to
 
http://www.regulations.gov
 
and follow the


instructions for sending your comments electronically.


•
 
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.
2


You can examine the contents of this AD docket on the Internet at
 
http://dms.dot.gov
, or at the


Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW., room


PL-401, on the plaza level of the Nassif Building, Washington, DC.


FOR FURTHER INFORMATION CONTACT:
 
Ken Sujishi, Aerospace Engineer, Systems and


Equipment Branch, ANM-130L, FAA, Los Angeles Aircraft Certification Office, 3960 Paramount


Boulevard, Lakewood, California 90712-4137; telephone (562) 627-5353; fax (562) 627-5210.


SUPPLEMENTARY INFORMATION:
 
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.


Actions Since Previous AD Was Issued


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 Federal Register as a notice


of proposed rulemaking (NPRM) on January 22, 2004 (69 FR 3036). The NPRM, Docket 2003-NM-


119-AD, would supersede AD 2001-14-08 to require that the repetitive inspections of the numbers 1


and 2 electric motors of the auxiliary hydraulic pump for electrical resistance, continuity, mechanical


rotation, and associated airplane wiring resistance/voltage; and corrective actions, if necessary, be


performed at reduced intervals (i.e., from 6,000 flight hours to 2,500 flight hours). That action was


prompted by a report from Boeing that the original compliance time was not adequate, because


another incident of failure of an electric motor of the auxiliary hydraulic pump had occurred during


the interval between repetitive inspections. The proposed actions 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.


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 prompted by several reports


of failure of the auxiliary hydraulic pump systems. The requirements of that AD are intended to


prevent failure of the electric motors of the 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.