# AD 75-20-09: Wing Vibrations - Type: Airworthiness directive - Status: Current - Products: Boeing 727-100 Series, 727-100C Series, 727-200 Series, 727-200F Series, 727 Series and 727C Series - Effective: December 12, 1975 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-2445 - Registered aircraft: 25 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/20580CAE65E54A2E86256E0D00492160.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/75-20-09 ## The airworthiness directive 75-20-09 BOEING: Amendment 39-2375 as amended by Amendment 39-2445. Applies to Boeing Model 727 series airplanes, certificated in all categories, listed in Boeing Service Bulletin No. 727-57-137, Revision 2, or later FAA approved revisions. Compliance required as indicated. To prevent wing vibration from loose blind rivets in the outboard aileron tab mast fittings, accomplish the following: A. Within the next 200 flight hours from April 21, 1975, unless AD 75-08-10 has previously been accomplished, inspect all outboard aileron tab mast fittings for looseness, and repair, as necessary, in accordance with Boeing Alert Service Bulletin No. 727-57-137, Revision 2, or later FAA approved revisions, or in a manner approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region. Within 15 days from the time of the inspection of each airplane, report all findings, positive or negative, to the Chief, Engineering and Manufacturing Branch, FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108, or call the FAA project engineer at (206) 767-2516. The report must include the following: a. Airplane model number. b. Airplane total time. c. Description of looseness condition, if applicable, including number and type of fasteners loose and number of fittings per tab with loose fasteners. (Reporting approved by the Bureau of the Budget under BOB No. 04R0174). B. Within the next 2500 flight hours or 325 days from November 5, 1975, whichever occurs first, inspect the attaching blind rivets of the outboard aileron tab mast fittings for looseness. Repair, as necessary, in accordance with Boeing Alert Service Bulletin 727-57-137, Revision 1, or later FAA approved revisions, or in a manner approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region. C. As terminating action to this AD, prior to July 1, 1977, unless already accomplished, replace all blind rivets with bolts and nutplates inaccordance with Boeing Alert Service Bulletin 727-57-137, Revision 1, or later FAA approved revisions, or in a manner approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region. 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). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Boeing Commercial Airplane Company, P. O. Box 3707, Seattle, Washington 98124. The documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington. Amendment 39-2375 became effective November 5, 1975. This amendment 39-2445 supersedes AD 75-08-10. This amendment 39-2445 becomes effective December 12, 1975. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A3WE](https://openairdocs.org/tcds/A3WE): The Boeing Company; names 6 of 6 models: 727-100 Series, 727 Series, 727-200 Series, 727-100C Series, 727-200F Series, 727C Series ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 25 (25 by airframe model, 0 by engine model) - Makers: Boeing 25 Models with the most aircraft: - [Boeing 727-223](https://openairdocs.org/model/boeing-727-223): 9 aircraft (airframe model) - [Boeing 727-227](https://openairdocs.org/model/boeing-727-227): 4 aircraft (airframe model) - [Boeing 727-225](https://openairdocs.org/model/boeing-727-225): 2 aircraft (airframe model) - [Boeing 727-200F](https://openairdocs.org/model/boeing-727-200f): 1 aircraft (airframe model) - [Boeing 727-200](https://openairdocs.org/model/boeing-727-200): 1 aircraft (airframe model) - [Boeing 727-212](https://openairdocs.org/model/boeing-727-212): 1 aircraft (airframe model) - [Boeing 727-230](https://openairdocs.org/model/boeing-727-230): 1 aircraft (airframe model) - [Boeing 727-232](https://openairdocs.org/model/boeing-727-232): 1 aircraft (airframe model) - [Boeing 727-243](https://openairdocs.org/model/boeing-727-243): 1 aircraft (airframe model) - [Boeing 727-247](https://openairdocs.org/model/boeing-727-247): 1 aircraft (airframe model) - [Boeing 727-264](https://openairdocs.org/model/boeing-727-264): 1 aircraft (airframe model) - [Boeing 727-281](https://openairdocs.org/model/boeing-727-281): 1 aircraft (airframe model) - [Boeing 727-277](https://openairdocs.org/model/boeing-727-277): 1 aircraft (airframe model) All 13 models: https://openairdocs.org/ad/75-20-09/models.md Every aircraft: https://openairdocs.org/ad/75-20-09/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.