[Federal Register Volume 59, Number 131 (Monday, July 11, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-15732]


[[Page Unknown]]

[Federal Register: July 11, 1994]


-----------------------------------------------------------------------


DEPARTMENT OF TRANSPORTATION
14 CFR Part 39

[Docket No. 93-NM-222-AD; Amendment 39-8960 AD 94-14-08]

 

Airworthiness Directives; Canadair Model CL-600-2B16 (CL-601-3A) 
Series Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: This amendment adopts a new airworthiness directive (AD), 
applicable to certain Canadair Model CL-600-2B16 series airplanes, that 
requires inspection to detect chafing of the wiring harness of the air 
driven generator (ADG), modification of the wiring harness, and repair 
of any chafed harness. This amendment is prompted by a report that the 
wiring harness on certain airplanes was produced in a configuration 
that is subject to chafing and electrical shorting. The actions 
specified by this AD are intended to prevent chafing or shorting of the 
wiring harness, which could result in loss of ADG power to the 
essential bus when the ADG is deployed during an emergency situation.

DATES: Effective August 10, 1994.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of August 10, 1994.

ADDRESSES: The service information referenced in this AD may be 
obtained from Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 
6087, Station A, Montreal, Quebec, H3C 3G9 Canada. This information may 
be examined at the Federal Aviation Administration (FAA), Transport 
Airplane Directorate, Rules Docket, 1601 Lind Avenue, SW., Renton, 
Washington; or at the FAA, Engine and Propeller Directorate, New York 
Aircraft Certification Office, 181 South Franklin Avenue, Room 202, 
Valley Stream, New York; or at the Office of the Federal Register, 800 
North Capitol Street, NW., suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: Michele Maurer, Aerospace Engineer, 
Systems and Equipment Branch, ANE-173, FAA Engine and Propeller 
Directorate, New York Aircraft Certification Office, 181 South Franklin 
Avenue, Room 202, Valley Stream, New York 11581; telephone (516) 791-
6427; fax (516) 791-9024.

SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal 
Aviation Regulations (14 CFR part 39) to include an airworthiness 
directive (AD) that is applicable to certain Canadair Model CL-600-2B16 
series airplanes was published in the Federal Register on March 14, 
1994 (59 FR 11735). That action proposed to require inspection to 
detect chafing and modification of the wiring harness of the air driven 
generator (ADG), and repair of any chafed harness.
    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. No comments were submitted in response 
to the proposal or the FAA's determination of the cost to the public. 
The FAA has determined that air safety and the public interest require 
the adoption of the rule as proposed.
    The FAA estimates that 25 airplanes of U.S. registry will be 
affected by this AD, that it will take approximately 1 work hour per 
airplane to accomplish the required actions, and that the average labor 
rate is $55 per work hour. Based on these figures, the total cost 
impact of the AD on U.S. operators is estimated to be $1,375, or $55 
per airplane.
    The FAA estimates that it will take approximately 9 work hours per 
airplane to accomplish the modification and the average labor rate is 
$55 per work hour. Required parts will cost approximately $199 per 
airplane. Based on these figures, the total cost impact of the 
modification on U.S. operators is estimated to be $17,350, or $694 per 
airplane.
    Based on the figures, above, the total (inspection plus 
modification) cost impact of the AD on U.S. operators is estimated to 
be $18,725, or $749 per airplane.
    The total cost impact figure discussed above is based on 
assumptions that no operator has yet accomplished any of the 
requirements of this AD action, and that no operator would accomplish 
those actions in the future if this AD were not adopted.
    The regulations adopted herein will not have substantial direct 
effects 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. Therefore, in 
accordance with Executive Order 12612, it is determined that this final 
rule does not have sufficient federalism implications to warrant the 
preparation of a Federalism Assessment.
    For the reasons discussed above, I certify that this action (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. A final evaluation has been prepared for this action 
and it is contained in the Rules Docket. A copy of it may be obtained 
from the Rules Docket at the location provided under the caption 
ADDRESSES.

List of Subjects in 14 CFR Part 39

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

Adoption of the Amendment

    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. App. 1354(a), 1421 and 1423; 49 U.S.C. 
106(g); and 14 CFR 11.89.


Sec. 39.13  [Amended]

    2. Section 39.13 is amended by adding the following new 
airworthiness directive:

94-14-08  Canadair: Amendment 39-8960. Docket 93-NM-222-AD.

    Applicability: Model CL-600-2B16 series airplanes having serial 
numbers 5099 through 5131, inclusive; certificated in any category.

    Note 1: Airplanes having serial numbers 5001 through 5098, 
inclusive, are subject to the requirements of AD 91-19-01, amendment 
39-8026 (which is similar in content to this amendment).

    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent loss of emergency power to the essential bus when the 
air driven generator (ADG) is deployed, accomplish the following:
    (a) Within 25 hours time-in-service after the effective date of 
this AD, inspect to detect chafing of the wiring harness of the ADG 
in accordance with Canadair Alert Service Bulletin A601-0370, 
Revision 1, dated April 15, 1993. If chafing is found, prior to 
further flight, repair in accordance with the service bulletin.
    (b) Within 60 days after the effective date of this AD, modify 
the harness installation of the ADG in accordance with Canadair 
Alert Service Bulletin A601-0370, Revision 1, dated April 15, 1993.
    (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, New York Aircraft Certification 
Office (ACO), FAA, Engine and Propeller Directorate. Operators shall 
submit their requests through an appropriate FAA Principal 
Maintenance Inspector, who may add comments and then send it to the 
Manager, New York ACO.

    Note 2: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the New York ACO.

    (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.
    (e) The inspection and modification shall be done in accordance 
with Canadair Alert Service Bulletin A601-0370, Revision 1, dated 
April 15, 1993. This incorporation by reference was approved by the 
Director of the Federal Register in accordance with 5 U.S.C. 552(a) 
and 1 CFR part 51. Copies may be obtained from Bombardier, Inc., 
Canadair, Aerospace Group, P.O. Box 6087, Station A, Montreal, 
Quebec, H3C 3G9 Canada. Copies may be inspected at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, 
Washington; or at the FAA, Engine and Propeller Directorate, New 
York Aircraft Certification Office, 181 South Franklin Avenue, Room 
202, Valley Stream, New York; or at the Office of the Federal 
Register, 800 North Capitol Street, NW., suite 700, Washington, DC.
    (f) This amendment becomes effective on August 10, 1994.

    Issued in Renton, Washington, on June 23, 1994.
S.R. Miller,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 94-15732 Filed 7-8-94; 8:45 am]
BILLING CODE 4910-13-U