[Federal Register Volume 59, Number 93 (Monday, May 16, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-11357]


[[Page Unknown]]

[Federal Register: May 16, 1994]


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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39 
[Docket No. 93-NM-200-AD; Amendment 39-8911; AD 94-10-04]
 

Airworthiness Directives; Jetstream Model 4101 Airplanes
AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment adopts a new airworthiness directive (AD), 
applicable to certain Jetstream Model 4101 airplanes, that requires a 
visual inspection of an area beneath the flooring for foreign objects 
and debris, removal of any foreign object or debris found, and 
installation of a protective guard on the rear cabin attendant seat. 
This amendment also requires a revision to the FAA-approved maintenance 
program to include repetitive visual inspections of the area above the 
protective guard for foreign objects and debris, and removal of any 
foreign object or debris found. This amendment is prompted by reports 
that foreign objects and debris have been found in the area around the 
elevator and rudder trim cables below the floor. The actions specified 
by this AD are intended to prevent foreign objects and debris from 
lodging in the control circuits and jamming the elevator and rudder 
trim systems.
DATES: Effective June 15, 1994.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of June 15, 1994.
ADDRESSES: The service information referenced in this AD may be 
obtained from Jetstream Aircraft, Inc., P.O. Box
16029, Dulles International Airport, Washington, DC 20041-6029. 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 Office of the Federal Register, 800 
North Capitol Street, NW., suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: William Schroeder, Aerospace Engineer, 
Standardization Branch, ANM-113, FAA, Transport Airplane Directorate, 
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (206) 
227-2148; fax (206) 227-1320.

SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal 
Aviation Regulations to include an airworthiness directive (AD) that is 
applicable to certain Jetstream Model 4101 airplanes was published in 
the Federal Register on January 25, 1994 (59 FR 3636). That action 
proposed to require a visual inspection of an area beneath the flooring 
for foreign objects and debris, removal of any foreign object or debris 
found, and installation of a protective guard on the rear cabin 
attendant seat. That action also proposed to require a revision to the 
FAA-approved maintenance program to include repetitive visual 
inspections of the area above the protective guard for foreign objects 
and debris, and removal of any foreign object or debris found.
    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. Due consideration has been given to 
the two comments received.
    Both commenters support the proposed rule.
    After careful review of the available data, including the comments 
noted above, the FAA has determined that air safety and the public 
interest require the adoption of the rule as proposed.
    The FAA estimates that 7 airplanes of U.S. registry will be 
affected by this AD, that it will take approximately 2 work hours per 
airplane to accomplish the required actions, and that the average labor 
rate is $55 per work hour. Required parts will be supplied by the 
manufacturer at no cost to operators. Based on these figures, the total 
cost impact of the AD on U.S. operators is estimated to be $770, or 
$110 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 14 CFR part 
39 of the Federal Aviation Regulations 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:

94-10-04  Jetstream Aircraft Limited: Amendment 39-8911. Docket 93-
NM-200-AD.

    Applicability: Model 4101 airplanes; constructors numbers 41004 
through 41023 inclusive; certificated in any category.
    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent jamming of the elevator and rudder trim systems, 
accomplish the following:
    (a) Within 30 days after the effective date of this AD, 
accomplish paragraphs (a)(1) and (a)(2) of this AD in accordance 
with Jetstream Alert Service Bulletin J41-A25-034, Revision 1, dated 
October 30, 1993.
    (1) Perform a visual inspection of the underfloor area for 
foreign objects and debris in accordance with the alert service 
bulletin. Prior to further flight, remove any foreign object or 
debris found during the inspection.
    (2) Install a protective guard on the rear cabin attendant seat 
in accordance with the alert service bulletin.
    (b) Within 30 days after the effective date of this AD, revise 
the FAA-approved maintenance program to require repetitive visual 
inspections of the area above the protective guard for foreign 
objects and debris, and removal of any foreign object or debris 
found, in accordance with the times and procedures specified in 
paragraph 2.C.(7) of Jetstream Alert Service Bulletin J41-A25-034, 
Revision 1, dated October 30, 1993, as applicable.
    (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, Standardization Branch, ANM-113, 
FAA, Transport Airplane Directorate. Operators shall submit their 
requests through an appropriate FAA Principal Maintenance Inspector, 
who may add comments and then send it to the Manager, 
Standardization Branch, ANM-113.

    Note: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Standardization Branch, ANM-113.

    (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, removal, and installation shall be done in 
accordance with Jetstream Alert Service Bulletin J41-A25-034, 
Revision 1, dated October 30, 1993, which contains the following 
list of effective pages: 

------------------------------------------------------------------------
                                Revision                                
                                  level                                 
          Page No.              shown on        Date shown on page      
                                  page                                  
------------------------------------------------------------------------
1, 3, 7......................  1.........  October 30, 1993.            
2, 4-6, 8-11.................  Original..  October 7, 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 Jetstream Aircraft, Inc., P.O. 
Box 16029, Dulles International Airport, Washington, DC 20041-6029. 
Copies may be inspected at the FAA, Transport Airplane Directorate, 
1601 Lind Avenue, SW., Renton, Washington; or at the Office of the 
Federal Register, 800 North Capitol Street, NW., suite 700, 
Washington, DC.
    (f) This amendment becomes effective on June 15, 1994.

    Issued in Renton, Washington, on May 5, 1994.
S.R. Miller,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 94-11357 Filed 5-13-94; 8:45 am]
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