Cavalon 915iS Lower Engine Mounting Nuts
AUTOGYRO Cavalon 915 iS · Service Bulletins
Overview
This service bulletin addresses the replacement of lower engine mounting nuts on the AutoGyro Cavalon fitted with a Rotax 915iS engine. It provides instructions to replace specific nuts that may lose clamping torque due to heat and vibration, ensuring flight safety.
- Service Bulletin AG-SB-2021-01-B-EN effective from 20 April 2021.
- Mandatory compliance for affected aircraft to ensure safety.
- Replacement of Binx M10 and SI Nyloc M10 nuts with M10 SI full metal nuts.
- Estimated man-hours for the task is 0.8 hours.
- Standard tools required for the replacement.
- No weight and balance effects from this service bulletin.
- Completion of the bulletin must be documented.
- Contact AutoGyro for support and claims.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Reference only, not for flight. Use the current approved manual for your aircraft. See terms, section 5.
Document
Source
Copy found at autogyrousa.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 2021
- File size ·
- 629 KB
- Copy found at ·
- autogyrousa.com
- Language ·
- en
What is the Cavalon 915iS Lower Engine Mounting Nuts?
The Cavalon 915iS Lower Engine Mounting Nuts is a service bulletins for the AUTOGYRO Cavalon 915 iS, dated 2021.
What year was the Cavalon 915iS Lower Engine Mounting Nuts published?
The Cavalon 915iS Lower Engine Mounting Nuts — the AUTOGYRO Cavalon 915 iS service bulletins on file — is dated 2021.
Common. More common than 85% of the aircraft models we track.
Most owners only have the POH. Here's the essential set for the AUTOGYRO Cavalon 915 iS.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
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In this document
Applicability
Applicable to AutoGyro Cavalon aircraft fitted with a Rotax 915iS engine.
Reason and Overview
Reports indicated that certain nuts could lose clamping torque due to heat and vibration, prompting the need for replacement with more reliable nuts.
Accomplishment Instructions
Instructions detail the steps to replace the affected nuts and ensure proper tightening.
Compliance
While no immediate flight safety risks were reported, checking the tightness of the fastenings is recommended.
Customer Support
Labour hours and materials are covered by this service bulletin, and claims require proper documentation.
Material Information
No specific materials are required other than the replacement nuts.
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Safety notes
- Failure to comply with mandatory actions may result in significant reduction of flight safety.
- Ensure a minimum of 1.5 threads of the bolt end are protruding from the nut once torqued.
- The task must be performed by trained personnel.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Full document text
Service Bulletin Contact & Info: airworthiness@auto-gyro.com www.auto-gyro.com AutoGyro GmbH Dornierstr. 14 31137 Hildesheim AG-SB-2021-01-B-EN Page 1 of 4 Title: Cavalon 915iS Lower Engine Mounting Nuts AG-SB-2021-01-B-EN Effective Date: 20 April 2021 Compliance Category: A - MANDATORY B – RECOMMENDED C - OPTIONAL Applicability Aircraft type & model: AutoGyro Cavalon Affected Serial number(s): AutoGyro Cavalon fitted with a Rotax 915iS engine The maintenance manual to be referenced is this stated or subsequent issue. As per AutoGyro website This form is the response from AutoGyro GmbH either against a problem found in the product in service requiring a containment or rectification action, or as service information for aircraft modification incorporation. For help, contact AutoGyro on 49(0)5121 88056-00, or email airworthiness@auto-gyro.com. Documentation (Service Bulletin Completion action) The accomplishment of this Service Bulletin, or the decision of its rejection, must be properly documented, if such procedure is required by the relevant authority Category Codes A – Mandatory – failure to comply result in a significant reduction of flight safety, injury or death B – Recommended – failure to comply may result in reduced safety margin, injury and/or equipment damage C - Optional – improves operating behavior, reliability and/or maintainability Chief Certification Officer Chief Technical Officer Service Bulletin Contact & Info: airworthiness@auto-gyro.com www.auto-gyro.com AutoGyro GmbH Dornierstr. 14 31137 Hildesheim AG-SB-2021-01-B-EN Page 2 of 4 Reason and overview of the Service Bulletin (cause of problem if known) In a small number of cases it has been reported during service feedback that on Cavalon fitted with a 915iS engine the lower engine mounting bolts assembled using Binx M10 nuts (43511) or using SI Nyloc M10 nuts (20183) can lose their clamping torque through the combined effects of heat and vibration. To prevent this AutoGyro has released a different nut that is less affected by the operational conditions. This service bulletin provides instructions for the replacement of the Binx M10 nuts (43511) or SI Nyloc M10 nuts (20183) with M10 SI full metal nuts (23630) for zinc plated engine mounting bolts. Manpower estimates The task may only be performed by an organization or individual entitled and trained to carry out maintenance on AutoGyro aircraft. Estimated man-hours to complete the task as a stand-alone item is: 0.8hr. Compliance In the cases reported there were no immediate flight safety risks; but AutoGyro recommends that the tightness of these two fastenings be checked at the earliest opportunity and rectified if needed as per this document. Customer Support Labour hours as stated above and required materials are covered by this SB. The SB reference AG-SB-2021-02-B-EN should be quoted on all labour claims and spares orders. Proof of assembled parts requiring replacement, and respective positions, should be submitted in the form of an email with photographs, stating works number and airframe hours to airworthiness@auto-gyro.com. No claims will be administered without this information. Tooling required Standard tools. Weight and Balance Effects Nil Manuals affected POH is unaffected. AMM to be updated at the next issue. Previous Modifications that affect the SB None Service Bulletin Contact & Info: airworthiness@auto-gyro.com www.auto-gyro.com AutoGyro GmbH Dornierstr. 14 31137 Hildesheim AG-SB-2021-01-B-EN Page 3 of 4 Accomplishment instructions (Action required to implement this bulletin): Effective date of this SB is 20 April 2021. Instructions 1. Gain access to the engine mountings by removing the upper and lower engine cowlings in accordance with the AMM job card 52-00-00 4-1. 2. Determine whether Binx M10 nuts (43511) or SI Nyloc M10 nuts (20183) are assembled on any of the lower engine mounting bolts. If SI full metal M10 nuts are fitted, no further action is required. 3. If Binx M10 or SI Nyloc M10 nuts are fitted, then replace with M10 SI full metal nuts (23630) for zinc plated engine mounting bolts in accordance with Job Card 71-20-00 8-1 of the respective AMM. Tighten well, noting that it is extremely difficult to access with a torque wrench. Target tightening torque 39Nm. Ensure a minimum of 1.5 threads of the bolt end are protruding from the nut once torqued. 4. Carry out a loose article and tool check. 5. Refit any previously removed cowlings in accordance with the respective job card. Binx M10 Nut (43511) SI Nyloc M10 Nut (20183) SI Full Metal M10 Nut (23630) Engine mount assembly with SI full metal M10 nut Service Bulletin Contact & Info: airworthiness@auto-gyro.com www.auto-gyro.com AutoGyro GmbH Dornierstr. 14 31137 Hildesheim AG-SB-2021-01-B-EN Page 4 of 4 Completion of this Service Bulletin must be recorded within the aircraft documentation, in line with the requirements of the country of operation. Material information (Parts required to be made to implement this service bulletin): Nil List of components (with purchasable part numbers) 23630 M10 SI full metal nut Interchangeability Not affected Parts disposition a) Disposal requirements – Nil b) Environmental hazards of parts containing hazardous materials – Nil c) Scrap requirements (e.g. mutilate scrapped items beyond use) – Nil