AD 98-25-09

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AD Number:
98-25-09
Document Type:
AD Final Rules
Docket Number:
98-NM-237-AD
Subject Heading:
Bombardier Models DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103, DHC-8-100, DHC-8-200, and DHC...Show more
Subject:
MLG Brake Shuttle Valves
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
01/14/1999
Make:
Bombardier Inc. | Viking Air Limited
Model:
DHC-8-101 | DHC-8-102 | DHC-8-103 | DHC-8-106 | DHC-8-201 | DHC-8-202 | DHC-8-301 | DHC-8-311 | DHC-...Show more
Product Type:
Aircraft
Product Subtype:
Large Airplane
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 98-25-09
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   98-NM-237-AD

AMENDMENT:   39-10935

AD NUMBER:   98-25-09

SUBJECT HEADING:   Bombardier Models DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103, DHC-8-100, DHC-8-200, and DHC-8-300 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective January 14, 1999.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
98-25-09 BOMBARDIER, INC. (Formerly de Havilland, Inc.): Amendment 39-10935. Docket 98-NM-237-AD.

Applicability: Model DHC-7-1, -100, -101, -102, and -103 series airplanes, having serial numbers (S/N) 003 through 113 inclusive; and Model DHC-8-100, -200, and -300 series airplanes, having S/N's 003 through 498 inclusive; certificated in any category.

NOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (c) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.

Compliance: Required as indicated, unless accomplished previously.

To prevent failure of the brake shuttle valves, and consequent loss of the brake effectiveness, due to installation of improper filter fittings, which could reduce controllability of the airplane during taxi, takeoff, and landing roll, accomplish the following:

(a) Within 3 months after the effective date of this AD, perform a one-time visual inspection to determine the serial numbers of the brake shuttle valves of the main landing gear (MLG), in accordance with Bombardier Alert Service Bulletin S.B. A7-32-102, Revision `A,' dated November 26, 1997 (for Model DHC-7 series airplanes), or S.B. A8-32-139, Revision `A,' dated December 19, 1997 (for Model DHC-8 series airplanes), as applicable. If any brake shuttle valve having S/N 2162A through 2244A inclusive is installed, prior to further flight, replace the filter fittings with new filter fittings, in accordance with the applicable alert service bulletin.

(b) As of the effective date of this AD, no person shall install a brake shuttle valve having part number 5084-1 on any airplane, unless it has been inspected and any defective filter fitting replaced, in accordance with the requirements of this AD.

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

(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 and replacement shall be done in accordance with Bombardier Alert Service Bulletin S.B. A7-32-102, Revision `A,' dated November 26, 1997, or Bombardier Alert Service Bulletin S.B. A8-32-139, Revision 'A,' dated December 19, 1997, as applicable. 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 Bombardier, Inc., Bombardier Regional Aircraft Division, 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 the FAA, Engine and Propeller Directorate, New York Aircraft Certification Office, 10 Fifth Street, Third Floor, Valley Stream, New York; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

NOTE 3: The subject of this AD is addressed in Canadian airworthiness directive CF-98-05, dated March 2, 1998.

(f) This amendment becomes effective on January 14, 1999.

FOOTER: