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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
Amendment 39-4587; AD 79-24-04 R1
BOEING Model 707-100, 707-100B, 707-200, and 720, 720B Series Airplanes
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Preamble Information
AGENCY: Federal Aviation Administration, DOT
DATES: Effective April 4, 1983.
Regulatory Information
79-24-04 R1 BOEING: Amendment 39-3617 as amended by Amendment 39-4587. Applies to all Boeing 707-100, 707-100B, 707-200, and Boeing 720, 720B series airplanes. Within the next number of landings shown in Table I, if not already accomplished within the last same number of landings, and at repeat intervals not to exceed those specified, visually inspect the horizontal stabilizer center section rear spar upper chord in accordance with page 9, paragraph IIIB, Boeing Service Bulletin 3332, Rev. 2, or in a manner approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. If cracks are found, repair prior to further flight in a manner approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region, except that airplanes may be flown to a maintenance base for repairs or replacement in accordance with FAR 21.197.
TABLE I
 | 720/720B | 707-100/-100B/-200 |
| Initial inspection interval | 125 landings | 175 landings |
| | |
| Repetitive inspections | 250 landings | 350 landings |
Accomplishment of the modification described in Accomplishment Instructions, Part II, of Boeing Service Bulletin 3332, Rev. 3, dated January 8, 1982, or later FAA approved revisions, constitutes terminating action for this AD.
The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1).
Amendment 39-3617 became effective November 27, 1979.
This Amendment 39-4587 becomes effective April 4, 1983.
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