SERVICE BULLETIN: JSB 008-1
JABIRU J400 · Service Bulletins
Overview
This service bulletin from Jabiru Aircraft Pty Ltd addresses the main undercarriage bolts for the Jabiru J400 family of aircraft. It outlines the necessity for replacing existing bolts with upgraded 3/8” bolts during the next 100-hourly inspection or sooner if certain risk factors are present.
- Applicable to all Jabiru J400 family aircraft with 3-door fuselages.
- Failures of main undercarriage bolts have been reported due to rough taxiways, high airframe hours, and maximum weight operations.
- Existing 5/16” bolts must be replaced with 3/8” bolts.
- Replacement is mandatory during the next 100-hourly inspection or within 10 hours of operation under risk conditions.
- 3/8” bolts are standard on new Jabiru aircraft models.
- Work must be performed by approved personnel.
- Maintenance log must be annotated after the service bulletin is completed.
Document
Source
Originally published by co.za. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 2005
- File size ·
- 983 KB
- Publisher ·
- co.za
- Language ·
- en
Specifications & performance
Extracted from this document.
Specifications
- Original bolt size ·
- 5/16"
- Undercarriage bolt size ·
- 3/8"
What is the SERVICE BULLETIN: JSB 008-1?
The SERVICE BULLETIN: JSB 008-1 is a service bulletins for the JABIRU J400, dated 2005.
Where does the SERVICE BULLETIN: JSB 008-1 come from?
This copy of the SERVICE BULLETIN: JSB 008-1 was originally published by co.za and is hosted on Sprinkle as a free, searchable reference copy.
What year was the SERVICE BULLETIN: JSB 008-1 published?
The SERVICE BULLETIN: JSB 008-1 — the JABIRU J400 service bulletins on file — is dated 2005.
Most owners only have the POH. Here's the essential set for the JABIRU J400.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
More JABIRU J400manuals & documents
In this document
Applicability
All Jabiru J400 family aircraft (all models with 3-door fuselages) and optional on other Jabiru Aircraft.
Background
Failures of main undercarriage leg attachment bolts have been linked to rough taxiways, high airframe hours, and operations near maximum take-off weight.
Recommendations
Replace existing 5/16” undercarriage bolts with 3/8” bolts during the next 100-hourly inspection or within 10 hours if exposed to risk factors.
Compliance
Modification is mandatory for all Jabiru models in the J400 family and should be done during the next 100-hourly inspection.
Procedure
Detailed steps for replacing the undercarriage bolts, including safety precautions and maintenance log requirements.
Safety notes
- All work must be carried out by approved personnel.
- Ensure fuel tanks are low and taps are turned off to prevent leakage during maintenance.
- Breather covers must be highly visible if blocked to prevent flight issues.
Full document text
JABIRU AIRCRAFT PTY LTD P.O. Box 5186 Phone: +61 7 4155 1778 Bundaberg West Fax: +61 7 4155 2669 Queensland, Australia. Email: info@jabiru.net.au SERVICE BULLETIN: JSB 008-1 Issue: 1 Date: 31st March 2005 Subject: Main Undercarriage Bolts – Jabiru Aircraft 1. Applicability: All Jabiru J400 family aircraft (all models with 3-door fuselages.) Optional on other Jabiru Aircraft. 2. Background: Recently some owners of Jabiru aircraft in the J400-family (models with 3-door fuselages) have suffered failures of the main undercarriage leg attachment bolts. These failures appear to have been contributed to by the following factors: i) Relatively rough grass taxiways or runways ii) Relatively high hours on the airframe. iii) Aircraft operated regularly at or close to the maximum take-off weight. While periodic inspection and replacement of the bolts would most likely prevent in-service failures, Jabiru Aircraft have decided to upgrade the undercarriage bolts on all new aircraft to 3/8”. 3. Recommendations: • Jabiru models in the J400 family (models with 3-door fuselages) must have their existing 5/16” undercarriage bolts replaced during the aircraft’s next 100-hourly inspection, or within 10 hours of operation if the aircraft is regularly exposed to the risk factors listed above. • Note that while 3/8” bolts are also being introduced on all other Jabiru models, this is being done solely to retain commonality between the models and is not considered a mandatory modification on any aircraft but those in the J400 family. 4. Compliance: This modification is mandatory for all Jabiru models in the J400 family (models with 3-door fuselages). This work should be carried out during the aircraft’s next 100-hourly inspection, or within 10 hours of operation if the aircraft is regularly exposed to the risk factors listed above. UNCONTROLLED COPY DATED: 31-03-2005 JSB008-1 Service Bulletin – Main Undercarriage Bolts – J400 Family JSB 008-1 31st March 2005 JSB008-1.doc Page 2 of 2 The use of 3/8” bolts is standard on all kits in the ranges given below: LSA / UL / SP & local Variants: Serial No. 642 and on. J400 Family (all 3-door fuselages): Serial No. 234-237, then 240 and on. J160 Family: Serial No. 25 and on. 5. Procedure: a) Note: all work must be carried out by approved personnel, such as the kit builder or a Level 2 Maintenance Authority holder. b) Remove fairings etc as necessary for access to the main undercarriage bolts. c) For aircraft with wing tanks, ensure that the fuel tanks are low, taps are turned off, or that the breathers are blocked to prevent fuel leakage while the aircraft is sitting on the jack at an angle. Note that if the breathers are blocked the covers should be highly visible to ensure they are noticed and removed before flight. d) Jack one main undercarriage leg clear of the ground. Jabiru Aircraft use a stand under the wing to lift the wheel clear of the floor. Padded saw-horses placed under the fuselage are also acceptable. e) Remove the outer undercarriage leg clamp bolts & clamp. Check the clamp plate visually and against a straight edge. If the plate is bent, contact Jabiru Aircraft for replacement parts. Remove the inner leg attachment bolt. f) Using a drill press, enlarge the existing 5/16” holes in the clamp plate to 3/8”. Ensure the new holes are parallel with the old. de-burr all accessible edges of the enlarged holes in aluminium parts. g) Carefully drill the bolt holes in the fuselage out to 3/8”. De-burr the accessible edges of the aluminium reinforcement plates bonded to the inside of the fuselage. h) Re-fit the leg in accordance with the details in the Technical and construction manuals, substituting 3/8” bolts in place of the original 5/16” parts. i) Let the aircraft back down onto it’s wheel, then repeat the process for the other main undercarriage leg. j) Replace leg fairings. k) Remove any breather covers (if used) and return all fuel taps to their normal positions. l) Annotate the aircraft’s maintenance log to show that Jabiru Service Bulletin JSB 008 has been carried out. UNCONTROLLED COPY DATED: 31-03-2005 JSB008-1