SERVICE BULLETIN: JSB 007-1
JABIRU J430 · Service Bulletins
Overview
This service bulletin from Jabiru Aircraft Pty Ltd addresses issues related to the main undercarriage stub axle in Jabiru aircraft. It outlines the need for inspection and replacement of certain axles due to fatigue cracking, particularly in high-time training and 'J Series' models.
- Applicable to all Jabiru Aircraft.
- Failures of the main undercarriage stub axle have been reported.
- Fatigue cracking occurs at the inboard end of the axle.
- Visual inspections may not detect all cracks.
- Original axles should be replaced with new type axles.
- Axles on 2-door fuselages should be replaced at or before 2500 hours.
- Axles on 3-door fuselages should be replaced at or before 250 hours.
- Modification of the brake caliper mounting plate is required for new axles.
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 skycraft.ltd. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 2004
- File size ·
- 448 KB
- Copy found at ·
- skycraft.ltd
- Language ·
- en
Specifications & performance
Extracted from this document.
Specifications
- Axle replacement hours 2 door ·
- 2500
- Axle replacement hours 3 door ·
- 250
What is the SERVICE BULLETIN: JSB 007-1?
The SERVICE BULLETIN: JSB 007-1 is a service bulletins for the JABIRU J430, dated 2004.
What year was the SERVICE BULLETIN: JSB 007-1 published?
The SERVICE BULLETIN: JSB 007-1 — the JABIRU J430 service bulletins on file — is dated 2004.
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- Parts Catalog (IPC)
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- Type Certificate (TCDS)
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In this document
Applicability
All Jabiru Aircraft.
Background
Failures of the main undercarriage stub axle have occurred, particularly in high-time training aircraft and 'J Series' models due to fatigue cracking.
Recommendations
Replace original axles with new type axles; specific replacement hours are provided for different fuselage types.
Procedure
Step-by-step instructions for replacing the axle and modifying the brake caliper mounting plate.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Safety notes
- Visual inspection should not be solely relied upon to determine axle fitness.
- Care must be taken when modifying the brake caliper mounting plate to avoid notching.
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
JABIRU AIRCRAFT PTY LTD P.O. Box 5186 Phone: +61 7 4155 1778 Bundaberg West 4670 Fax: +61 7 4155 2669 Queensland, Australia Email: info@jabiru.net.au SERVICE BULLETIN: JSB 007-1 Issue: 1 Date: 29 th November 2004 Subject: Main Undercarriage Stub Axle 1. Applicability All Jabiru Aircraft. 2. Background Some failures of the main undercarriage stub axle have recently occurred in Jabiru aircraft. The failures occurred high-time training aircraft and “J Series” (models with 3-door fuselages) aircraft. Inspection showed that the failures had been caused by fatigue cracking at the inboard end of the axle (refer to Figure 1 below.). Note that visual inspection of these parts should not be used to judge if the part is fit to remain in service; some axles which appeared sound after cleaning and inspecting with 10X magnification were tested with dye penetrant and found to have cracks. Date: 29 th Nov 2004 Jabiru Aircraft Pty Ltd Document No: JSB007-1 Filename: Page: JSB007-1.doc 2 of 5 Main Undercarriage Stub Axle Figure 1. Original Stub Axle 3. Recommendations Replace the original axles with new type axles (refer to Figure 2 below). This is a one-time replacement – once the new axles are fitted, they need not be replaced. Note that due to the fillet radius machined into the root of the new stub axles, the brake caliper mounting plate must also be modified or replaced. • Axles fitted to 2 door fuselages (UL, SP, LSA, J160 models etc) should be replaced at or before reaching 2500 hours. • Axles fitted to 3 door fuselages (J400, J430, J450 and J200 family models) should be replaced at or before reaching 250 hours. Crack site Date: 29 th Nov 2004 Jabiru Aircraft Pty Ltd Document No: JSB007-1 Filename: Page: JSB007-1.doc 3 of 5 Main Undercarriage Stub Axle Figure 2. New Type Stub Axle The new axle can be distinguished from the old by the fillet radius machined into the root, and the taper instead of a step in diameter near the root. Date: 29 th Nov 2004 Jabiru Aircraft Pty Ltd Document No: JSB007-1 Filename: Page: JSB007-1.doc 4 of 5 Main Undercarriage Stub Axle Figure 3. Main Wheel & Brake Assy Fillet radius added here on new axle Inner side of hole thru caliper mounting plate must be chamfered to clear fillet on axle. Date: 29 th Nov 2004 Jabiru Aircraft Pty Ltd Document No: JSB007-1 Filename: Page: JSB007-1.doc 5 of 5 Main Undercarriage Stub Axle Figure 4. Brake Caliper Mounting Plate 4. Procedure i. Raise the wheel off the ground by jacking under the lower end of the fiberglass leg or by placing a support under the wing. ii. Remove wheel spat (if fitted). iii. Remove wheel from axle. iv. Remove the axle and brake caliper mounting plate. v. If the existing brake caliper mounting plate is to be modified and re-fitted, the chamfer can be cut using a die-grinder type tool or hand tools. Note that care must be taken not to notch the part, and once the bulk of material has been removed the tool marks must be removed using a fine file, then Scotch-Brite (or similar) polishing pads. vi. Re-fit the wheel and brake assembly, then replace the second axle using the process given above. Chamfer added to clear fillet on axle