SB-GA8-2015-126

Issue 1

MANDATORY PO Box 881, Morwell, Victoria 3840, Australia

Ph + 61 (0) 3 5172 1200

Fax + 61 (0) 3 5172 1201 www.gippsaero.com

Service Bulletin

Subject:

Inspection of the Crankcase Breather Tube

Applicability:

All GA8 & GA8-TC 320 aircraft up to and including serial number GA8-TC 320-15-212

Amendments:

Issue 1: Initial issue. Ref GAE11-1578

Background:

An instance of Crankcase Breather Tube blockage due to icing has occurred during cold weather operations. All GA8 and GA8-TC aircraft require an inspection of the breather tube to ensure the bypass hole has been included at manufacture.

This Service Bulletin instructs the operators where to look for the bypass hole (relief aperture) and make sure it has been included at manufacture and is unobstructed. This Service Bulletin also addresses where and how a bypass hole should be included if required.

Compliance:

The requirements of this Service Bulletin shall be accomplished before the next flight. If an absence of a bypass hole is found then this should be rectified before any further flights.

Weight and Balance:

Nil

Approval:

This Service Bulletin has been approved pursuant to Regulation 21.095 of CASR (1998).

Parts:

The following parts are to be inspected to accomplish this Service Bulletin.

PART No.

GA8-717301-011

GA8-71312-011

DESCRIPTION

(GA8) Breather Tube Assembly

(GA8-TC 320) Breather Tube

Assembly

QTY Remarks

1

1

Inspect for blockages and Bypass Hole.

Figure 1

Inspect for blockages and Bypass Hole.

Figure 2

Parts Availability:

New parts can be obtained directly from GippsAero.

Tel: +61 (0)3 5172 1200

Fax: +61 (0)3 5172 1201

Email: [email protected]

Labour:

1 man hour should be allocated for completing the work detailed in this Service Bulletin.

SB-GA8-2015-126 Issue 1 Date of Issue: 10.02.2015 Page 1 of 4

Warranty:

Aircraft under warranty may claim the direct cost of carrying out the requirements of this Service

Bulletin via GippsAero Customer Service.

Tel:

Fax:

+61 (0)3 5172 1200

+61 (0)3 5172 1201

Email: [email protected]

Accomplishment Instructions:

NOTE:

Ensure the aircraft is prepared for maintenance and that appropriate safety precautions are taken when performing work outlined in this Service Bulletin.

Unless otherwise specified, reference to the GA8/GA8-TC 320 Service Manual as well as FAA AC43.13-1B & FAA AC43.13-2B should be made when carrying out the procedure prescribed in this Service Bulletin. In case of discrepancy between the Service Manual and the AC, the Service Manual takes precedence.

1. Remove the engine cowls as required in accordance with the applicable Service Manual.

2. Identify the installed location of the Crankcase Breather Tube as shown in Figure 1. Perform a visual inspection of the Tube and determine if a bypass hole exists. If the bypass hole does exist, check to ensure that the Breather Tube and bypass hole are clear of obstructions and fill out the compliance note document at the end of this Service Bulletin. If no bypass hole exists, proceed to

Step 3.

3. Using a 0.250” diameter drill, drill a bypass hole into the Breather Tube approximately 8.33” from the bottom of the tube as indicated in Figure 3. The hole should face forward and be distorted slightly (fluted) using a 1/4” pry bar (refer to Figure 4) to indent the upper portion of the hole inwards and extrude the bottom portion of the hole outwards.

4. Deburr hole to finish. Remove any tooling.

5. Clean all swarf from working area and re-assemble engine cowls.

Figure 1: Breather Tube Locations

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Drill 1/4” hole

Drill 1/4”

Hole

Figure 2: Area of Bypass Holes (Flute)

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Figure 3: Bypass hole positioning

Figure 4: Hole flute detail

Documentation:

Update aircraft log book to reflect incorporation of this Service Bulletin.

Continuing Airworthiness:

During subsequent engine inspections, verify that the Crankcase Breather Tube and bypass hole is checked for any blockages. All other instructions already specified in the aircraft Service Manual continue to be applicable.

Future issues of the Service Manual will contain clarified information as contained in this Service

Bulletin.

Compliance Notice:

Complete the Document Compliance Notice and return to GippsAero by mail, fax or email.

SB-GA8-2015-126 Issue 1 Date of Issue: 10.02.2015 Page 4 of 4

DOCUMENT COMPLIANCE NOTICE

Document:

SB-GA8-2015-126

Issue 1

Aircraft Serial Number: GA8-______________

Service Bulletin SB-GA8-2015-126 Issue 1 has been incorporated in the above aircraft.

Date of Incorporation: _____________________

______________________________________

Signed

Print Name: ____________________________

Please post, fax or email this compliance notice to:

GippsAero Technical Services

P.O. Box 881

Morwell Victoria 3840

Australia

Fax.: +61 03 5172 1201

Email: [email protected]