| AD Number | 92-12-04 | Status | Active |
| Effective Date | July 24, 1992 | Issue Date | Not specified |
| Docket Number | 91-NM-267-AD | Amendment | 39-8264 |
| Product Type | ["Aircraft"] | Product Subtype | ["Large Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Viking Air Limited |
| Model(s) | DHC-7-1 DHC-7-100 DHC-7-101 DHC-7-102 DHC-7-103 |
92-12-04 DE HAVILLAND, INC.: Amendment 39-8264. Docket No. 91-NM-267-AD.
Applicability: de Havilland Model DHC-7 series airplanes; serial numbers 1 through 23; certificated in any category.
Compliance: Required as indicated, unless accomplished previously.
To prevent reduced structural integrity of flap track no. 1, accomplish the following:
(a) Within 6 months after the effective date of this AD, perform a one-time dye penetrant inspection to detect cracks in flap track no. 1, in accordance with de Havilland Service Bulletin 7-53-15, Revision A, dated November 27, 1981.
(b) If cracks are evident or suspected as a result of the inspection required by paragraph (a) of this AD, prior to further flight, replace the flap track in accordance with de Havilland Service Bulletin 7-53-15, Revision A, dated November 27, 1981.
(c) If no cracks are evident or suspected as a result of the inspection required by paragraph (a) of this AD, within 6 months after theeffective date of this AD, modify the lower surface of flap track no. 1 in accordance with de Havilland Service Bulletin 7-53-15, Revision A, dated November 27, 1981.
(d) An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, New York Aircraft Certification Office, ANE-170, FAA, Engine and Propeller Directorate. The request shall be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, New York Aircraft Certification Office, ANE-170.
NOTE: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the New York Aircraft Certification Office.
(e) 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.(f) The inspections and repairs shall be done in accordance with de Havilland Service Bulletin 7-53-15, Revision A, dated November 27, 1981. 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 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, 1100 L Street NW., Room 8401, Washington, DC.
(h) This amendment becomes effective on July 24, 1992.