[Federal Register Volume 59, Number 33 (Thursday, February 17, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-3235]


[[Page Unknown]]

[Federal Register: February 17, 1994]


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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39

[Docket No. 93-NM-58-AD; Amendment 39-8825; AD 89-02-12 R1]

 

Airworthiness Directives; Gulfstream Model G-IV Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment revises an existing airworthiness directive 
(AD), applicable to certain Gulfstream Model G-IV airplanes, that 
currently requires deactivating instrument landing systems (ILS) that 
utilize dedicated Bendix radios. This amendment provides for an 
optional terminating action, which, if accomplished, allows 
reactivation of the Bendix ILS systems. This amendment is prompted by 
the development of a modification that positively addresses the 
identified unsafe condition. The actions specified by this AD are 
intended to prevent the hazardous deviations from the intended course.

DATES: Effective March 21, 1994.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of March 21, 1994.

ADDRESSES: The service information referenced in this AD may be 
obtained from Gulfstream Aerospace Corporation, P.O. Box 2206, M/S D-
10, Savannah, Georgia 31402-2206. 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, Small Airplane Directorate, Atlanta Aircraft 
Certification Office, 1669 Phoenix Parkway, suite 210C, Atlanta, 
Georgia; or at the Office of the Federal Register, 800 North Capitol 
Street NW., suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: Steve Flanagan, Aerospace Engineer, 
Airframe Branch, ACE-120A, FAA, Small Airplane Directorate, Atlanta 
Aircraft Certification Office, 1669 Phoenix Parkway, suite 210C, 
Atlanta, Georgia 30349; telephone (404) 991-2910; fax (404) 991-3606.

SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal 
Aviation Regulations by revising AD 89-02-12, Amendment 39-6155 (54 FR 
11165, March 17, 1989), which is applicable to certain Gulfstream G-IV 
airplanes, was published in the Federal Register on October 27, 1993 
(58 FR 57756). That action proposed to revise AD 89-02-12 to continue 
to require deactivating the instrument landing systems (ILS) utilizing 
dedicated Bendix radios and modifying the electronic display controller 
wiring. That action also proposed to provide for an optional 
terminating action, which consists of modifying the ILS receivers 
hardware and TCAS symbol generators software for the #1 and #2 
electronic display controllers.
    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. Due consideration has been given to 
the single comment received.
    The commenter supports the proposed rule.
    After careful review of the available data, including the comment 
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 there are approximately 95 Model G-IV 
airplanes of the affected design in the worldwide fleet. The FAA 
estimates that 59 airplanes of U.S. registry will be affected by this 
action.
    The actions currently required by AD 89-02-12 take approximately 3 
work hours per airplane to accomplish, at an average labor rate of $55 
per work hour. Based on these figures, the total cost impact of that AD 
on U.S. operators is estimated to be $9,735, or $165 per airplane.
    This revision of AD 89-02-12 will add no new additional costs to 
operators, since it merely provides for an optional terminating action. 
Should an operator elect to accomplish the terminating action, the 
associated modification will take approximately 6 work hours per 
airplane to accomplish. The relocation and certification of a new AM/FM 
entertainment antenna will take approximately 120 work hours per 
airplane to accomplish. The average labor charge is $55 per work hour. 
All required parts will be provided free of charge by the manufacturer. 
Based on these figures, the total cost of accomplishing the optional 
terminating action is estimated to be $6,930 per airplane.
    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 removing amendment 39-6155 (54 FR 
11165, March 17, 1989), and by adding a new airworthiness directive 
(AD), amendment 39-8825, to read as follows:


89-02-12 R1 Gulfstream: Amendment 39-8825. Docket 93-NM-58-AD. 
Revises AD 89-02-12, Amendment 39-6155.

    Applicability: Model G-IV airplanes, as listed in Gulfstream 
Aircraft Service Change No. 110, dated January 24, 1989, 
certificated in any category.
    Compliance: Required as indicated, unless accomplished 
previously.

    Note 1: Paragraphs (a) and (b) of this AD merely restate the 
requirements of paragraphs A. and B. of AD 89-02-12, Amendment 39-
6155. As allowed by the phrase, ``unless accomplished previously,'' 
if those requirements of AD 89-02-12 have already been accomplished, 
paragraphs (a) and (b) of this AD do not require that those actions 
be repeated.

    To prevent hazardous deviations from the intended course, 
accomplish the following:
    (a) Prior to further flight after April 3, 1989 (the effective 
date of AD 89-02-12, Amendment 39-6155), discontinue use of the 
Bendix instrument landing system (ILS) radios for any type of 
approach. Pull both circuit breakers (C/B) on the co-pilot's C/B 
panel labeled ``ILS #1'' and ``ILS #2.'' Tie-wrap the C/B's out, 
using TY23M or equivalent tie-wraps. Affix placards (Gulfstream 
decal #1159F40000-911 or equivalent) to the control heads and the C/
B's, labeling them ``INOP.''
    (b) Within 10 hours of airplane operation after April 3, 1989 
(the effective date of AD 89-02-12, Amendment 39-6155), modify the 
wiring to the #1 and #2 electronic display controllers, in 
accordance with Gulfstream Aircraft Service Change No. 110, dated 
January 24, 1989. -
    (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, Atlanta Aircraft Certification 
Office (ACO), FAA, Small 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, Atlanta ACO.
    Note 2: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Atlanta ACO.
    (d) Special flight permits may be issued in accordance with FAR 
21.197 and 21.199 to operate the airplane to a location where the 
requirements of this AD can be accomplished.
    (e) Accomplishment of the actions specified in both paragraphs 
(e)(1) and (e)(2) of this AD constitutes terminating action for the 
requirements of this AD:
    (1) Modify the Bendix ILS systems in accordance with Gulfstream 
Aircraft Service Change No. 110A, dated April 9, 1993; and
    (2) Prior to further flight after accomplishing the actions 
specified in paragraph (e)(1) of this AD, reactivate the Bendix ILS 
systems after relocating the forward radome mounted AM/FM 
entertainment antenna system in accordance with a method approved by 
the Manager, Atlanta ACO, FAA, Small Airplane Directorate.
    (f) The modifications shall be done in accordance with 
Gulfstream Aircraft Service Change No. 110, dated January 24, 1989, 
and Gulfstream Aircraft Service Change No. 110A, dated April 9, 
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 Gulfstream Aerospace 
Corporation, P.O. Box 2206, M/S D-10, Savannah, Georgia 31402-2206. 
Copies may be inspected at the FAA, Transport Airplane Directorate, 
1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Small 
Airplane Directorate, Atlanta Aircraft Certification Office, 1669 
Phoenix Parkway, suite 210C, Atlanta, Georgia; or at the Office of 
the Federal Register, 800 North Capitol Street, NW., suite 700, 
Washington, DC.
    (g) This amendment becomes effective on March 21, 1994.

    Issued in Renton, Washington, on February 7, 1994.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 94-3235 Filed 2-16-94; 8:45 am]
BILLING CODE 4910-13-U