# AD 50-23-02: Nose Gear Yoke End Fitting - Type: Airworthiness directive - Status: Current - Products: Boeing DC-6, DC-6A and DC-6B - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Registered aircraft: 17 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4C3449868DD26D68862569BC005F11D0.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/50-23-02 ## The airworthiness directive 50-23-02 DOUGLAS: Applies to All Model DC-6 Aircraft. To be accomplished as indicated below: 1. All P/N 5245424 and P/N 5248748 nose gear yoke end fittings which have not been shotpeened in the journal radius prior to original installation or by subsequent rework should be removed for inspection after being in service for a period not to exceed 6,000 hours. Nose gear yoke end fittings which have already accumulated service time in excess of 6,000 hours should be removed for inspection as soon as practical but not later than September 1, 1950. Shotpeening can be distinguished by the dull gray color and coarse surface of the shotpeened area. 2. Fittings removed at the 6,000-hour period may be used for an additional 4,000 hours or a total service life of 10,000 hours if inspected and reworked as follows: (a) Strip anodic surface from part, and subject to Zyglo inspection paying particular attention to the journal radius. If no cracks are found, the radius should be polished to remove all blemishes and then shotpeened. This inspection and shotpeening must be done by the Douglas Aircraft Co., an agency approved by that company, or by a method that has been substantiated as being equivalent to the procedure recommended by the Douglas Co. (b) Inspect the base radius of the spot faces of the six mounting holes. Parts having zero radius (sharp corner) to 0.031 radius at this point must be reworked to obtain an 0.062 spot face radius. It will be permissible to increase the original spot face diameter of 1 1/8 inches to 1 1/4 inches to obtain the 0.062 radius. Parts having 0.031 or better radius need not be reworked. Parts should be reanodized after completion of all work. (c) Inspect the inside diameter of the 2103390 ring. All sharp edges should be given a 0.031 radius. (d) Inspect the inside diameter of the flanged end of the 2333253 bushing to see that it has a 1/8-inch radius and rework if necessary. 3. Fittings shotpeened at time of original installation may be operated for a maximum service period of 10,000 hours provided they do not have the zero spot face radius at the mounting holes. Parts falling in this category should be removed at the normal gear overhaul period of 8,000 hours for rework of the spot face radius. 4. All fittings should be scrapped after reaching a total service life of 10,000 hours. (Douglas General Service Letter DC-6 No. 26 dated April 7, 1950, covers the same subject.) ## Affected data sheets (3) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 6A3](https://openairdocs.org/tcds/6A3): The Boeing Company; names 1 of 3 models: DC-6A - [TCDS 6A4](https://openairdocs.org/tcds/6A4): The Boeing Company; names 1 of 2 models: DC-6B - [TCDS A-781](https://openairdocs.org/tcds/A-781): The Boeing Company; names 1 of 1 models: DC-6 ## 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: 17 (17 by airframe model, 0 by engine model) - Makers: Douglas 17 Models with the most aircraft: - [Douglas DC-6B](https://openairdocs.org/model/douglas-dc-6b): 9 aircraft (airframe model) - [Douglas DC-6A](https://openairdocs.org/model/douglas-dc-6a): 7 aircraft (airframe model) - [Douglas DC-6](https://openairdocs.org/model/douglas-dc-6): 1 aircraft (airframe model) All 3 models: https://openairdocs.org/ad/50-23-02/models.md Every aircraft: https://openairdocs.org/ad/50-23-02/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.