[Federal Register Volume 67, Number 3 (Friday, January 4, 2002)]
[Rules and Regulations]
[Pages 499-500]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 02-86]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2001-NM-104-AD; Amendment 39-12542; AD 2001-24-25]
RIN 2120-AA64


Airworthiness Directives; McDonnell Douglas Model DC-9-10, -20, -
30, and -40 Series Airplanes and C-9 Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule; correction.

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SUMMARY: This document corrects information in an existing 
airworthiness directive (AD) that applies to certain McDonnell Douglas 
Model DC-9-10, -20, -30, and -40 series airplanes and C-9 airplanes. 
That AD currently requires modification of the spoiler control system, 
and installation of protective interlock box assemblies in the spoiler 
circuit. This document corrects the affected models specified in the 
``Applicability'' of the AD. This correction is necessary to ensure 
that the appropriate affected airplane models are identified correctly.

DATES: Effective January 16, 2002.
    The incorporation by reference of certain publications listed in 
the regulations was approved previously by the Director of the Federal 
Register as of January 16, 2002 (66 FR 64114, December 12, 2001).

FOR FURTHER INFORMATION CONTACT: Elvin Wheeler, Aerospace Engineer, 
Systems and Equipment Branch, ANM-130L, FAA, Los Angeles Aircraft 
Certification Office, 3960 Paramount Boulevard, Lakewood, California 
90712-4137; telephone (562) 627-5344; fax (562) 627-5210.

SUPPLEMENTARY INFORMATION: On November 28, 2001, the Federal Aviation 
Administration (FAA) issued AD 2001-24-25, amendment 39-12542 (66 FR 
64114, December 12, 2001), which applies to certain McDonnell Douglas 
Model DC-9-10, -20, -30, and -40 series airplanes and C-9 airplanes. 
That AD requires modification of the spoiler control system, and 
installation of protective interlock box assemblies in the spoiler 
circuit. The actions required by that AD are intended to prevent smoke/
fire in the flight compartment in the event that the automatic spoiler 
actuator overheats, and/or loss of the spoiler control system, which 
could significantly reduce the braking effectiveness of the airplane. 
That action is intended to address the identified unsafe condition.

Need for the Correction

    The FAA has determined that a correction to AD 2001-24-25 is 
necessary. We note that the ``Applicability'' section of the AD 
specifies ``Model DC-10-10, -20, -30, and -40 series airplanes and C-9 
airplanes, as listed in Boeing Alert Service Bulletin DC9-27A147, 
Revision 03, dated May 8, 2001; certificated in any category.'' 
Although the applicability of the notice of proposed rulemaking (NPRM) 
was also stated incorrectly, the error was not noted until after 
publication of the final rule. However, all other references to the 
affected airplanes in the final rule are correct: ``McDonnell Douglas 
Model DC-9-10, -20, -30, and -40 series airplanes and C-9 airplanes.'' 
The correction will revise the ``Applicability'' section of the final 
rule to specify that the affected airplanes are ``Model DC-9-10, -20, -
30, and -40 series airplanes and C-9 airplanes.''

Correction of Publication

    This document corrects the error and correctly adds the AD as an 
amendment to section 39.13 of the Federal Aviation Regulations (14 CFR 
39.13).
    The AD is reprinted in its entirety for the convenience of affected 
operators. The effective date of the AD remains January 16, 2002.
    Since this action only corrects an inadvertent typographical error, 
it has no adverse economic impact and imposes no additional burden on 
any person. Therefore, the FAA has determined that notice and public 
procedures are unnecessary.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Correction

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the Federal Aviation Administration amends part 39 of 
the Federal Aviation Regulations (14 CFR part 39) as follows:

PART 39--AIRWORTHINESS DIRECTIVES

    1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec. 39.13  [Corrected]

    2. Section 39.13 is amended by correctly adding the following 
airworthiness directive (AD):

2001-24-25  McDonnell Douglas: Amendment 39-12542. Docket 2001-NM-
104-AD.

    Applicability: Model DC-9-10, -20, -30, and -40 series 
airplanes, and C-9 airplanes, as listed in Boeing Alert Service 
Bulletin DC9-27A147, Revision 03, dated May 8, 2001; certificated in 
any category.

    Note 1: This AD applies to each airplane identified in the 
preceding applicability provision, regardless of whether it has been 
modified, altered, or repaired in the area subject to the 
requirements of this AD. For airplanes that have been modified, 
altered, or repaired so that the performance of the requirements of 
this AD is affected, the owner/operator must request approval for an 
alternative method of compliance in accordance with paragraph (c) of 
this AD. The request should include an assessment of the effect of 
the modification, alteration, or repair on the unsafe condition 
addressed by this AD; and, if the unsafe condition has not been 
eliminated, the request should include specific proposed actions to 
address it.

    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent smoke/fire in the flight compartment in the event 
that the automatic spoiler actuator overheats, and/or loss of the 
spoiler control system, which could significantly reduce the braking 
effectiveness of the airplane; accomplish the following:

Modification of the Spoiler Control System

    (a) Within 18 months after the effective date of this AD, modify 
the spoiler control system by accomplishing all actions specified in 
the Accomplishment Instructions of Boeing Alert Service Bulletin 
DC9-27A147, Revision 03, dated May 8, 2001, per the service 
bulletin.

    Note 2: Modification per McDonnell Douglas Service Bulletin DC9-
27-147, dated January 7, 1972; Revision 1, dated July 30, 1974; or 
Revision 2, dated May 9, 1975; before the effective date of this AD; 
is considered acceptable for compliance with paragraph (a) of this 
AD.

Installation of Protective Interlock Box Assemblies

    (b) Prior to or in conjunction with the requirements of 
paragraph (a) of this AD,

[[Page 500]]

install protective interlock box assemblies in the spoiler circuit, 
per McDonnell Douglas DC-9 Service Bulletin 27-103, dated March 19, 
1968.

Alternative Methods of Compliance

    (c) An alternative method of compliance or adjustment of the 
compliance time that provides an acceptable level of safety may be 
used if approved by the Manager, Los Angeles Aircraft Certification 
Office (ACO), FAA. Operators shall submit their requests through an 
appropriate FAA Principal Maintenance Inspector, who may add 
comments and then send it to the Manager, Los Angeles ACO.

    Note 3: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Los Angeles ACO.

Special Flight Permit

    (d) Special flight permits may be issued in accordance with 
sections 21.197 and 21.199 of the Federal Aviation Regulations (14 
CFR 21.197 and 21.199) to operate the airplane to a location where 
the requirements of this AD can be accomplished.

Incorporation by Reference

    (e) The actions shall be done in accordance with Boeing Alert 
Service Bulletin DC9-27A147, Revision 03, dated May 8, 2001, and 
McDonnell Douglas DC-9 Service Bulletin 27-103, dated March 19, 
1968; as applicable. This incorporation by reference was approved 
previously by the Director of the Federal Register as of January 16, 
2002 (66 FR 64114, December 12, 2001). Copies may be obtained from 
Boeing Commercial Aircraft Group, Long Beach Division, 3855 Lakewood 
Boulevard, Long Beach, California 90846, Attention: Data and Service 
Management, Dept. C1-L5A (D800-0024). Copies may be inspected at the 
FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, 
Washington; or at the FAA, Los Angeles Aircraft Certification 
Office, 3960 Paramount Boulevard, Lakewood, California; or at the 
Office of the Federal Register, 800 North Capitol Street, NW., suite 
700, Washington, DC.

Effective Date

    (f) The effective date of this amendment remains January 16, 
2002.

    Issued in Renton, Washington, on December 20, 2001.
Ali Bahrami,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.

[FR Doc. 02-86 Filed 1-3-02; 8:45 am]
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