AD 87-14-08

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AD Number:
87-14-08
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; DEHAVILLAND Model DHC-7 Series Airplanes
Subject:
Wing Fuel Tanks
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
08/01/1987
Make:
Viking Air Limited
Model:
DHC-7-1 | DHC-7-100 | DHC-7-101 | DHC-7-102 | DHC-7-103
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Superseded AD: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Superseded By: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: 87-14-08
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5677

AD NUMBER:   87-14-08

SUBJECT HEADING:   Airworthiness Directives; DEHAVILLAND Model DHC-7 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective August 1, 1987.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:   87-14-08 DEHAVILLAND AIRCRAFT COMPANY OF CANADA, A DIVISION OF BOEING OF CANADA, LTD.: Amendment 39-5677. Applies to all Model DHC-7 series airplanes, certificated in any category. Compliance required as indicated, unless previously accomplished.

To preclude a fuel fire in the wing landing light bay, accomplish the following:

A. Within the next 50 hours time-in-service after the effective date of this AD, gain access to the No. 4 flap track canoe "footprint area," the tank end ribs, and the wing box outboard of the No. 1 and No. 4 wing fuel tanks, in accordance with Paragraph A. of the Accomplishment Instructions of de Havilland Aircraft Company of Canada Service Bulletin 7-57-30, dated March 6, 1987, or Revision A, dated May 8, 1987. Conduct an external inspection of the tank end ribs, wing box outboard of the fuel tanks, and complete front spar to rear spar footprint areas of each No. 4 flap track canoe installation, in accordance with Paragraph B. of the Accomplishment Instructions of the service bulletin. If evidence of fuel leakage is found, prior to further flight perform an internal inspection, repair, and pressure test of the fuel tank, in accordance with Paragraph C. of the Accomplishment Instructions of the service bulletin.

B. Within 200 hours time-in-service after the effective date of this AD, install Modification 7/2536, in accordance with Paragraph D. of the Accomplishment Instructions of de Havilland Aircraft Company of Canada Service Bulletin 7-57-30, dated March 6, 1987, or Revision A, dated May 8, 1987.

C. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, New York Aircraft Certification Office, FAA, New England Region.

D. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of the inspections and modifications required by this AD.

All persons affected by this directive who have not already received the appropriate service information from the manufacturer may obtain copies upon request to The de Havilland Aircraft Company of Canada, a Division of Boeing of Canada, Ltd., Garrett Boulevard, Downsview, Ontario M3K 1Y5, Canada. This information may be examined at FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or FAA, New England Region, New York Aircraft Certification Office, 181 South Franklin Avenue, Room 202, Valley Stream, New York.

This amendment becomes effective August 1, 1987.

FOOTER: