29 Mar 2024, 07:51 [ UTC - 5; DST ]
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Post subject: Re: What do you know about the Cessna 421C Posted: 02 Mar 2022, 13:46 |
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Joined: 11/25/16 Posts: 1819 Post Likes: +1382 Location: 2IS
Aircraft: C501
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Username Protected wrote: Jeff,
Your MT props - are they 4 blades? As far as other mods go, you can still get the main gear wheel covers and I’m told that the Strake mod is also obtainable. I was unaware that the winglets were no longer an option.
John That's correct, we've got the 4-blade. I'm told that the wheel covers and strakes are obtainable (and helpful), too. Those sound incredible.
[youtube]https://youtu.be/Y8SiilrFsUk[/youtube]
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Post subject: Re: What do you know about the Cessna 421C Posted: 02 Mar 2022, 15:11 |
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Joined: 11/22/08 Posts: 2914 Post Likes: +922 Company: USAF Propulsion Laboratory Location: Dayton, OH
Aircraft: PA24, AEST 680, 421
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AD 2000-01-16
The visual inspection is more than just a quick look.
VISUAL INSPECTION (a) CLEANING In order to properly inspect the exhaust system, components must be clean and free of oil, grease, etc. If required, clean as follows:
(1) Clean engine exhaust components with a suitable solvent, allow to drain, and wipe dry with a clean cloth.
(2) Remove the heat shields from the turbocharger in accordance with the heat shield removal procedures in the appropriate Cessna Aircraft Service Manual.
(3) Remove shields around the exhaust bellows or slip joints, multi-segment "V" band clamps at joints, and other items that might hinder the inspection of the system. Removal of the "V" band clamps may not be necessary.
(4) Using crocus cloth, polish any suspect surfaces to verify that no cracks or pinholes exist in the material. Replace or repair any part where cracks or pinholes exist.
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Post subject: Re: What do you know about the Cessna 421C Posted: 02 Mar 2022, 15:12 |
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Joined: 11/22/08 Posts: 2914 Post Likes: +922 Company: USAF Propulsion Laboratory Location: Dayton, OH
Aircraft: PA24, AEST 680, 421
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(b) VISUAL INSPECTION OF COMPLETE SYSTEM NOTE 1: Conduct this inspection when the engine is cool.
(1) Visually inspect exhaust stacks for burned areas, cracks, bulges, and looseness. Make sure the attach bolts are properly torqued, in accordance with the appropriate Cessna Aircraft Service Manual. NOTE 2: During this inspection, pay special attention to the condition of the bellows, if installed, and welded areas along the seams; the welded areas around the bellows; and the welded seams around the exhaust system components.
(2) Visually inspect the flexible connection between the waste-gate and overboard duct (when applicable) for cracks and security.
(3) Visually inspect the exhaust joint springs for correct compression. If the joint is disturbed or if the springs are obviously loose or frozen, proceed with the following inspection (see Figure 1 of this Appendix).
(i) Before removal of the exhaust joint springs, measure the inalled length of each spring, and replace the springs compressed to less than .45 inch.
(ii) Remove all the springs and measure the free length. Replace any spring having a free length of less than .57 inch. NOTE 3: Add AN960-10 (or FAA-approved equivalent part number) washers under the head of the joint bolts as required to obtain the correct dimension. During installation, the joint bolts should be tightened gradually and spring length checked frequently to prevent over-compression of the springs.
(iii) Reinstall the springs and measure the installed length. The length must be .51 inch (+.00, -.03 inch).
(4) If installed, visually inspect the slip joint(s) for bulges beyond the normal manufacturing irregularities of .03 inches and/or cracks. If any bulges and/or cracks are present, replace the bulged or cracked slip joint(s). (Refer to the appropriate Cessna Aircraft Service Manual) (See Figure 2 of this Appendix).
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