2008-24-01 Viking Air Limited: Amendment 39-15741; Docket No. FAA- 2008-0891; Directorate Identifier 2008-CE-046-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective December 30, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 airplanes, serial numbers (SNs) 1 through 696, that
(1) have not had modifications 6/1676 and 6/1726 installed; and
(2) are certificated in any category.
Subject
(d) Air Transport Association of America (ATA) Code 27: Flight Controls.
Reason
(e) The mandatory continuing airworthiness information (MCAI) states:
Three instances have occurred in which the aircraft took off with pre-mod 6/1676 flight control gust locks still installed, sometimes with disastrous results.
The MCAI, to prevent an attempted take-off with the gust locks installed, requires the incorporation of de Havilland Modification 6/1676 (ensures downward deflection of the elevators when the control locks are engaged) and incorporation of de Havilland Modification 6/1726 (adds to the control lock a warning flag which masks essential flight instruments on the pilot's instrument panel). Based on investigation, the FAA and National Transportation Safety Board believe
that an attempted takeoff with the gust locks installed could be the cause of a recent accident in Hyannis, Massachusetts.
Actions and Compliance
(f) Unless already done, within 6 calendar months after December 30, 2008 (the effective date of this AD), do the following actions using Boeing Canada de Havilland Division Service Bulletin No. 6/ 508, Revision "A,'' dated January 31, 1990:
(1) Incorporate de Havilland Modification 6/1676, which assures downward deflection of the elevators when the control locks are engaged.
(2) Incorporate de Havilland Modification 6/1726, which adds to the control lock a warning flag that covers up essential flight instruments on the pilot's instrument panel.
FAA AD Differences
Note: This AD differs from the MCAI and/or service information as follows: No differences.
Other FAA AD Provisions
(g) The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, Standards Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Fabio Buttitta, Aerospace Engineer, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone: (516) 228-7303; fax: (516) 794- 5531. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO.
(2) Airworthy Product: For any requirement in this AD to obtain corrective actions from a manufacturer or other source, use these actions if they are FAA-approved. Corrective actions are considered FAA-approved if they are approved by the State of Design Authority (or their delegated agent). You are required to assure the product is airworthy before it is returned to service.
(3) Reporting Requirements: For any reporting requirement in this AD, under the provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.), the Office of Management and Budget (OMB) has approved the information collection requirements and has assigned OMB Control Number 2120-0056.
Related Information
(h) Refer to MCAI Transport Canada AD No. CF-90-01, dated January 31, 1990; and Boeing Canada de Havilland Division Service Bulletin No. 6/508, Revision "A,'' dated January 31, 1990, for related information.
Material Incorporated by Reference
(i) You must use Boeing Canada de Havilland Division Service Bulletin No. 6/508, Revision "A,'' dated January 31, 1990, to do the actions required by this AD, unless the AD specifies otherwise.
(1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) For service information identified in this AD, contact Viking Air Ltd., 9564 Hampden Rd., Sidney, British Columbia, Canada V8L 5V5; telephone: 800-663-8444 or 250-656-7227; fax: 250-656-0673; E-mail:
[email protected]; Web: http://www.vikingair.com.
(3) You may review copies at the FAA, Central Region, Office of the Regional Counsel, 901 Locust, Room 506, Kansas City, Missouri 64106; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal- register/cfr/ibr-locations.html.
