[Federal Register Volume 59, Number 21 (Tuesday, February 1, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-453]


[[Page Unknown]]

[Federal Register: February 1, 1994]


=======================================================================
-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 93-NM-116-AD; Amendment 39-8795; AD 94-01-13]

 

Airworthiness Directives; de Havilland Model DHC-8-300 Series 
Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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

SUMMARY: This amendment adopts a new airworthiness directive (AD), 
applicable to certain de Havilland Model DHC-8-300 series airplanes, 
that requires modifying the airplane fire detection system and revising 
the Airplane Flight Manual (AFM) to include procedures related to 
operating the system. This amendment is prompted by reports of several 
oil fires in the inter compressor case (ICC) assembly. The actions 
specified by this AD are intended to prevent severe structural damage 
to the airplane due to an internal engine fire within the ICC.

DATES: Effective March 3, 1994.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of March 3, 1994.

ADDRESSES: The service information referenced in this AD may be 
obtained from de Havilland, Inc., Garratt Boulevard, Downsview, Ontario 
M3K 1Y5, 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: Richard Fiesel, Aerospace Engineer, 
Propulsion Branch, ANE-174, FAA, Engine and Propeller Directorate, New 
York Aircraft Certification Office, 181 South Franklin Avenue, room 
202, Valley Stream, New York 11582; telephone (516) 791-7422; fax (516) 
791-9024.

SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal 
Aviation Regulations to include an airworthiness directive (AD) that is 
applicable to certain de Havilland Model DHC-8-300 series airplanes was 
published in the Federal Register on September 29, 1993 (58 FR 50868). 
That action proposed to require the installation of an inter compressor 
case (ICC) fire detection system, connection of the ICC fire detection 
system to the airplane fire detection system, and a revision to the AFM 
to provide the flight crew with operating procedures associated with 
the ICC fire detection system.
    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 9 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 $985 
per airplane. Based on these figures, the total cost impact of the AD 
on U.S. operators is estimated to be $28,120, or $1,480 per airplane. 
This total cost figure assumes that no operator has yet accomplished 
the requirements of this AD.
    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:

94-01-13 De Havilland, Inc.: Amendment 39-8795. Docket 93-NM-116-AD.

    Applicability: Model DHC-8-301, -311, and -314 series airplanes, 
serial numbers 100 through 332 inclusive; certificated in any 
category.
    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent severe structural damage to the airplane due to an 
internal engine fire within the inter compressor case, accomplish 
the following:
    (a) Within 90 days after the effective date of this AD, 
accomplish paragraphs (a)(1), (a)(2), and (a)(3) of this AD:
    (1) Install an inter compressor case (ICC) fire detection system 
in accordance with de Havilland Service Bulletin S.B. 8-26-14, dated 
March 6, 1992.
    (2) Connect the ICC fire detection system to the airplane fire 
detection system in accordance with de Havilland Service Bulletin 
S.B. 8-26-14, dated March 6, 1992.
    (3) Revise Section 4, ``Abnormal Procedures'', Page 4-10-1, of 
the FAA-approved Airplane Flight Manual (AFM), by adding the 
following steps immediately after step 1 of paragraph 4-10, ``Engine 
Fire Detection System Failures''. This may be accomplished by 
inserting a copy of this AD in the AFM.

``For aircraft incorporating de Havilland Modification 8/1835
2. FAULT A advisory light illuminates--Land as soon as 
practicable.''

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

    (c) 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.
    (d) The installation and connection shall be done in accordance 
with de Havilland Service Bulletin S.B. 8-26-14, dated March 6, 
1992. 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 de Havilland, Inc., Garratt 
Boulevard, Downsview, Ontario M3K 1Y5, Canada. Copies may be 
inspected at the FAA, Transport Airplane Directorate, 1601 Lind 
Avenue, SW., Renton, Washington; or at 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.
    (e) This amendment becomes effective on March 3, 1994.

    Issued in Renton, Washington, on January 4, 1994.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 94-453 Filed 1-31-94; 8:45 am]
BILLING CODE 4910-13-U