# AD 93-07-14: Inspect MLG Wheel Spacer Retainer Assembly - Type: Airworthiness directive - Status: Current - Products: Boeing DC-9-32F (C-9A), DC-9-32F (C-9B), DC-9-33F, DC-9-34, DC-9-34F, DC-9-41 and DC-9-51 - Effective: June 1, 1993 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-8546 - Docket: 92-NM-171-AD - Registered aircraft: 6 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8181ADA24A67414786256A080065BFEC.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/93-07-14 ## The airworthiness directive 93-07-14 MCDONNELL DOUGLAS: Amendment 39-8546. Docket 92-NM-171-AD. Applicability: Model DC-9-33F, -34, -34F, -41, and -51 series airplanes, and C-9 (military) airplanes; as listed in McDonnell Douglas DC-9 Service Bulletin 32-228, Revision 1, dated October 6, 1989; certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent main landing gear wheel assembly separation during wheel rotation, accomplish the following: (a) Within 2,000 landings or 18 months after the effective date of this AD, whichever occurs first: Conduct a one-time inspection of the main landing gear (MLG) wheel spacer retainer assemblies for correct hardness of the wheel spacer retainer assemblies and proper installation of the anti-rotation pin, in accordance with McDonnell Douglas DC-9 Service Bulletin 32-228, Revision 1, dated October 6, 1989. (1) If hardness of the wheel spacer retainer assembly is within limits specified in the service bulletin, and the anti-rotation pin is properly installed, as described in the service bulletin, prior to further flight, permanently mark the wheel spacer retainer assembly with the marking "S/B 32-228." NOTE: Operators may use any marking procedure that does not create significant stress concentration effects. Acceptable methods include stamping or electro-chemical etch. An appropriate area to mark is the outside diameter of the wheel spacer retainer assembly, at least 2 inches away from the anti-rotation pin. (2) If hardness of the wheel spacer retainer assembly is not within limits specified in the service bulletin or the anti-rotation pin is not properly installed, as described in the service bulletin, prior to further flight, replace the wheel spacer retainer assembly, in accordance with McDonnell Douglas DC-9 Service Bulletin 32-228, Revision 1, dated October 6, 1989. After accomplishing this replacement, permanently mark the wheel spacer retainer assembly withthe marking "S/B 32-228." (b) As of the effective date of this AD, only wheel spacer retainer assemblies marked "SB 32-228" may be installed on any airplane. (c) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Los Angeles Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Los Angeles ACO. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO. (d) 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. (e) The inspection and replacement shall be done in accordance with McDonnell Douglas DC-9 Service Bulletin 32-228, Revision 1, dated October 6, 1989. 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 McDonnell Douglas Corporation, P.O. Box 1771, Long Beach, California 90846-1771, Attention: Business Unit Manager, Technical Publications, C1-HDR (54-60). Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Transport Airplane Directorate, Los Angeles Aircraft Certification Office (ACO), 3229 East Spring Street, Long Beach, California; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment becomes effective on June 1, 1993. ## 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 6 of 25 models: DC-9-41, DC-9-34F, DC-9-33F, DC-9-51, DC-9-32F, 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: 6 (6 by airframe model, 0 by engine model) - Makers: Mcdonnell Douglas 4, 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-9-32F](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 4 models: https://openairdocs.org/ad/93-07-14/models.md Every aircraft: https://openairdocs.org/ad/93-07-14/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.