# AD 87-13-10: Rudder Drive Crank Assembly - Type: Airworthiness directive - Status: Current - Products: Boeing DC-9-31, DC-9-32, DC-9-32 (VC-9C), DC-9-32F, DC-9-32F (C-9A), DC-9-32F (C-9B), DC-9-33F, DC-9-34, DC-9-34F and DC-9-41 - Effective: August 8, 1987 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-5666 - Registered aircraft: 7 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7F6C88E648DB18BA862569F2006C7B62.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/87-13-10 ## The airworthiness directive 87-13-10 MCDONNELL DOUGLAS: Amendment 39-5666. Applies to McDonnell Douglas Model DC-9-30, -40, and C-9 (Military) series airplanes, Fuselage Numbers 1 through 1084, certificated in any category. Compliance required as indicated, unless previously accomplished. To prevent the failure of the rudder drive crank assembly, accomplish the following: A. Within 1,000 landings or 150 days after the effective date of this AD, whichever occurs earlier, unless already accomplished within the last 2,000 landings or 7 months, eddy current or ultrasonically inspect the rudder drive crank assembly for cracks in accordance with McDonnell Douglas DC-9 Service Bulletin 27-261, Revision 1, dated April 3, 1987, or later FAA-approved revisions. 1. If no cracks are found, accomplish repetitive inspections at intervals not to exceed 12 months or 3,000 landings, whichever occurs earlier, until such time as the procedures described in paragraph A.3., below, are accomplished. 2. If crack(s) are found, before further flight, replace cracked rudder drive crank assembly with a new P/N 5912801-1 or -501 drive crank. If a new 5912801-1 drive crank assembly is used as a replacement part, inspect in accordance with paragraph A.1., above. 3. Installation of rudder drive crank assembly P/N 5912801-501, in accordance with McDonnell Douglas DC-9 Service Bulletin 27-261, Revision 1, dated April 3, 1987, or later FAA-approved revisions, constitutes terminating action for the repetitive inspections required by paragraph A.1., above. B. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region. C. Upon the request of an operator, an FAA Maintenance Inspector, subject to prior approval of the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region, may adjust the repetitive inspection intervals specified inthis AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the change for that operator. All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to the McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Director, Publications and Training, C1-L65 (54-60). These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or at 4344 Donald Douglas Drive, Long Beach, California. This amendment becomes effective August 8, 1987. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A6WE](https://openairdocs.org/tcds/A6WE): The Boeing Company; names 7 of 25 models: DC-9-41, DC-9-34F, DC-9-33F, DC-9-31, DC-9-32F, DC-9-32 (VC-9C), DC-9-34 ## 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: 7 (7 by airframe model, 0 by engine model) - Makers: Mcdonnell Douglas 5, Douglas 2 Models with the most aircraft: - [Mcdonnell Douglas DC-9-33F](https://openairdocs.org/model/mcdonnell-douglas-dc-9-33f): 3 aircraft (airframe model) - [Douglas DC-9-32F](https://openairdocs.org/model/douglas-dc-9-32f): 1 aircraft (airframe model) - [Mcdonnell Douglas DC-9-32](https://openairdocs.org/model/mcdonnell-douglas-dc-9-32): 1 aircraft (airframe model) - [Mcdonnell Douglas DC-9-32F](https://openairdocs.org/model/mcdonnell-douglas-dc-9-32f): 1 aircraft (airframe model) - [Douglas DC-9-33F](https://openairdocs.org/model/douglas-dc-9-33f): 1 aircraft (airframe model) All 5 models: https://openairdocs.org/ad/87-13-10/models.md Every aircraft: https://openairdocs.org/ad/87-13-10/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.