[Federal Register: September 1, 2004 (Volume 69, Number 169)]
[Proposed Rules]
[Page 53366-53367]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr01se04-19]
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Proposed Rules
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains notices to the public of
the proposed issuance of rules and regulations. The purpose of these
notices is to give interested persons an opportunity to participate in
the rule making prior to the adoption of the final rules.
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[[Page 53366]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2003-NM-119-AD]
RIN 2120-AA64
Airworthiness Directives; 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, DC-
10-40F, MD-10-10F, and MD-10-30F Airplanes; and Model MD-11, and MD-11F
Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Proposed rule; withdrawal.
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SUMMARY: This action withdraws a notice of proposed rulemaking (NPRM)
that proposed a new airworthiness directive (AD), applicable to certain
McDonnell Douglas airplane models. That action would have superseded an
existing AD 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. Since the issuance of the NPRM, the
Federal Aviation Administration (FAA) has determined that the proposed
inspection requirements are identical to the inspection requirements of
another existing AD. Accordingly, the proposed rule is withdrawn.
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: 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 proposed rule
would have superseded AD 2001-14-08, amendment 39-12319 (66 FR 36441,
July 12, 2001), 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 were 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 That Occurred Since the NPRM Was Issued
Since the issuance of that NPRM, we 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.
The repetitive inspections required by AD 2004-05-20 are identical
to those proposed in the NPRM. Accomplishment of the modification and
repetitive inspections requirements of AD 2004-05-20 adequately
addresses the identified unsafe condition.
FAA's Conclusions
Upon further consideration, we have determined that the proposed
inspection requirements of the NPRM are identical to the inspection
requirements of AD 2004-05-20. Accordingly, the NPRM is hereby
withdrawn.
Withdrawal of this NPRM constitutes only such action, and does not
preclude the agency from issuing another action in the future, nor does
it commit the agency to any course of action in the future.
Other Relevant Rulemaking
For the reasons discussed previously, we are also planning on
rescinding AD 2001-14-08 in a separate rulemaking action.
Regulatory Impact
Since this action only withdraws a notice of proposed rulemaking,
it is neither a proposed nor a final rule and therefore is not covered
under Executive Order 12866, the Regulatory Flexibility Act, or DOT
Regulatory Policies and Procedures (44 FR 11034, February 26, 1979).
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
The Withdrawal
Accordingly, the notice of proposed rulemaking, Docket 2003-NM-119-
AD, published in the Federal Register on January 22, 2004 (69 FR 3036),
is withdrawn.
[[Page 53367]]
Issued in Renton, Washington, on August 20, 2004.
Kevin M. Mullin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 04-19925 Filed 8-31-04; 8:45 am]
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