[Federal Register Volume 59, Number 182 (Wednesday, September 21, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-23223]


[[Page Unknown]]

[Federal Register: September 21, 1994]


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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39

[Docket No. 94-NM-35-AD; Amendment 39-9026; AD 94-19-04]

 

Airworthiness Directives; Raytheon Corporate Jets Model BAe 125-
1000A Series 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 Raytheon Corporate Jets Model BAe 125-1000A 
series airplanes, that requires modification of the control circuit 
wiring for the engine thrust reversers and of the wiring for 
annunciation of rudder bias status. This amendment is prompted by a 
report that a single dormant electrical fault in the control circuit of 
the thrust reversers could cause a thrust reverser to deploy if the 
pilot selects reverse thrust during the approach phase of flight; and 
by reports that if an asymmetric thrust reverser condition occurs, the 
correct rudder bias may not be annunciated before the flight crew 
applies high reverse thrust. The actions specified by this AD are 
intended to prevent adversely affected controllability of the airplane.

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

ADDRESSES: The service information referenced in this AD may be 
obtained from Raytheon Corporate Jets Inc., 3 Bishops Square, St. 
Albans Road West, Hatfield, Hertfordshire, AL109NE, United Kingdom. 
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 (14 CFR part 39) to include an airworthiness 
directive (AD) that is applicable to certain Raytheon Corporate Jets 
Model BAe 125-1000A series airplanes was published in the Federal 
Register on April 29, 1994 (59 FR 22141). That action proposed to 
require modification of the control circuit wiring for the engine 
thrust reversers and of the wiring for annunciation of rudder bias 
status.
    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 19 airplanes of U.S. registry will be 
affected by this AD, that it will take approximately 60 work hours per 
airplane to accomplish the required actions, and that the average labor 
rate is $55 per work hour. Required parts will cost approximately 
$1,000 per airplane. Based on these figures, the total cost impact of 
the AD on U.S. operators is estimated to be $81,700, or $4,300 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:

94-19-04 Raytheon Corporate Jets, Inc.:

    Amendment 39-9026. Docket 94-NM-35-AD.

    Applicability: Model BAe 125-1000A series airplanes; serial 
numbers 258151, 258159, and 259003 through 259044 inclusive; 
certificated in any category.
    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent in-flight deployment of a thrust reverser, which 
could adversely affect the controllability of the airplane, 
accomplish the following:

    (a) Within 8 months after the effective date of this AD, modify 
the control circuit wiring for the left and right engine thrust 
reversers and rudder bias status annunciation, in accordance with 
Raytheon Corporate Jets Service Bulletin SB.78-9-3662B, dated 
January 7, 1994.
    (b) 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.

    (c) 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.
    (d) The modification shall be done in accordance with Raytheon 
Corporate Jets Service Bulletin SB.78-9-3662B, dated January 7, 
1994. 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 Raytheon Corporate Jets Inc., 3 
Bishops Square, St. Albans Road West, Hatfield, Hertfordshire, 
AL109NE, United Kingdom. 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.
    (e) This amendment becomes effective on October 21, 1994.

    Issued in Renton, Washington, on September 14, 1994.
Donald L. Riggin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 94-23223 Filed 9-20-94; 8:45 am]
BILLING CODE 4910-13-U