Airworthiness Directives; British Aerospace Model BAe 146-100A, - 200A, and -300A Series Airplanes

DEPARTMENT OF TRANSPORTATION

14 CFR Part 39

[Docket No. 94-NM-42-AD; Amendment 39-9009; AD 94-17-14]

Airworthiness Directives; British Aerospace Model BAe 146-100A, -

200A, and -300A Series Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment supersedes an existing airworthiness directive

(AD), applicable to British Aerospace Model BAe 146-100A, -200A, and -

300A series airplanes, that currently requires replacing the quick

release coupling halves on each end of the pump case drain line on the

hydraulic engine driven pump (EDP) on the number 2 and number 3 engines

with improved fire resistant coupling halves. This amendment revises

the applicability of the existing AD. This amendment is prompted by the

identification of additional airplanes that are subject to the

addressed unsafe condition. The actions specified by this AD are

intended to prevent hydraulic fluid leakage from the pump case drain

line quick release coupling, which could fuel the flames in the event

of an engine fire.

DATES: Effective on October 11, 1994.

The incorporation by reference of British Aerospace Service

Bulletin SB.29-31-01339A, Revision 1, dated July 8, 1993, as listed in

the regulations, is approved by the Director of the Federal Register as

of October 11, 1994.

The incorporation by reference of British Aerospace Service

Bulletin SB.29-31-01339A, dated May 24, 1993, as listed in the

regulations, was approved previously by the Director of the Federal

Register as of January 20, 1994 (58 FR 67310, December 21, 1993).

ADDRESSES: The service information referenced in this AD may be

obtained from British Aerospace, PLC, Librarian for Service Bulletins,

P.O. Box 17414, Dulles International Airport, Washington, DC 20041-

0414. 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) by superseding AD 93-24-05,

amendment 39-8754 (58 FR 67310, December 21, 1993), which is applicable

to certain British Aerospace Model BAe 146-100A, -200A, and -300A

series airplanes, was published in the Federal Register on May 12, 1994

(59 FR 24670). The action proposed to continue require replacement of

the quick release coupling halves on each end of the pump case drain

line on the hydraulic engine driven pump (EDP) on the number 2 and

number 3 engines with improved fire resistant coupling halves, and

proposed to revise the applicability of the existing AD to add

additional airplanes.

Interested persons have been afforded an opportunity to participate

in the making of this amendment. No comments were received on 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 46 airplanes of U.S. registry will be

affected by this AD, that it will take approximately 3 work hours per

airplane to accomplish the required actions, and that the average labor

rate is $55 per work hour. Required parts will be provided 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 $7,590, or

$165 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 removing amendment 39-8754 (58 FR

67310), and by adding a new airworthiness directive (AD), amendment 39-

9009, to read as follows:

94-17-14 British Aerospace: Amendment 39-9009. Docket 94-NM-42-AD.

Supersedes AD 93-24-05, Amendment 39-8754.

-Applicability: Model BAe 146-100A series airplanes, serial

numbers E1002 through E1199 inclusive; Model BAe 146-200A series

airplanes, serial numbers E2008 through E2204 inclusive, and E2210

through E2220 inclusive; and Model BAe 146-300A series airplanes,

serial numbers E3001 through E3219 inclusive, and E3222;

certificated in any category. -

Compliance: Required as indicated, unless accomplished

previously. -

To prevent hydraulic fluid leakage from the pump case drain line

quick release couplings, which could fuel the flames in the event of

an engine fire, accomplish the following: -

(a) For airplane serial numbers E3001 through E3207 inclusive,

E3209 through E3219 inclusive, and E3222: Within 6 months after

January 20, 1994 (the effective date of AD 93-24-05, Amendment 39-

8754), replace the quick release coupling halves on each end of the

pump case drain line on the hydraulic engine driven pump (EDP) on

the number 2 and number 3 engines with improved fire resistant

coupling halves, in accordance with British Aerospace Service

Bulletin SB.29-31-01339A, dated May 24, 1993, or SB.29-31-01339A,

Revision 1, dated July 8, 1993. -

(b) For airplane serial numbers E1002 through E1199 inclusive,

E2008 through E2204 inclusive, E2210 through E2220 inclusive, and

E3208: Within 6 months after the effective date of this AD, replace

the quick release coupling halves on each end of the pump case drain

line on the hydraulic EDP on the number 2 and number 3 engines with

improved fire resistant coupling halves, in accordance with British

Aerospace Service Bulletin SB.29-31-01339A, Revision 1, dated July

8, 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, 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

Federal Aviation Regulations (FAR) 21.197 and 21.199 to operate the

airplane to a location where the requirements of this AD can be

accomplished. -

(e) The replacement shall be done in accordance with British

Aerospace Service Bulletin SB.29-31-01339A, Revision 1, dated July

8, 1993, which includes the following list of effective pages: -

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Revision

Page level shown Date shown on page

on page

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1-.......................... 1-........... July 8, 1993.

2-11........................ Original..... (These pages are not

dated).

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This incorporation by reference is approved by the Director of the

Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part

51. The incorporation by reference of British Aerospace Service

Bulletin SB.29-31-01339A, dated May 24, 1993, was approved

previously by the Director of the Federal Register in accordance

with 5 U.S.C. 552(a) and 1 CFR Part 51 as of January 20, 1994 (58 FR

67310, December 21, 1993). Copies may be obtained from British

Aerospace, PLC, Librarian for Service Bulletins, P.O. Box 17414,

Dulles International Airport, Washington, DC 20041-0414. 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 October 11, 1994.

Issued in Renton, Washington, on August 16, 1994.

Darrell M. Pederson,

Acting Manager, Transport Airplane Directorate, Aircraft Certification

Service.

[FR Doc. 94-21966 Filed 9-8-94; 8:45 am]

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