P&M Aviation SB 144 Spiral Ring Replacement


Following maintenance, a clevis pin came out of the RP-4 roll trim system pulley on a QuikR causing a left turn. The split ring securing the clevis pin had come out. It is not known if the ring was disturbed during the maintenance.

The split ring which came out was the same “spiral start” pattern as that which has caused trouble before (see Service Bulletin 139). This pattern of ring has no positive stop, so that simple rotation of the ring (e.g. caused by it getting caught on something) will cause it to disengage. See A below, showing the ring starting to disengage.

Type C is better having a 90 degree positive stop. Type D is used on the QuikR and GTR washout rod universal joints and the most secure type of ring, having no starting ramps and 2 complete turns through the hole. All type A split rings have been discarded at the Factory.



Split rings of the spiral start pattern “A” above must be removed in all locations and be replaced with stainless steel split pins or rings to pattern C or D. The small 4mm clevis pins used in the RP-4 pulley take a 1/16” split pin, part no. FPSP-002. Larger clevis pins take 5/64” stainless steel 316 split pins, part no. FPSP-005.

The ends of the split pin should be trimmed and curled over so as to minimise the possibility of snagging.

3) Documentation

The aircraft technical log must be signed “ Service bulletin SB144 (split rings) carried out” by a qualified inspector and/or an owner/operator.

4) Continued Airworthiness

At each permit revalidation, the inspector must check the service bulletin has been carried out, that there are no split rings of the “spiral

You can read the full service bulletin here.

Eurostar EV-97 Wing Spar Cap Inspection

LSA has received information from two Eurostar owners regarding the wing lower spar cap which on inspection has shown cracking of the paint which may indicate unusual movement of the joint between the fuselage and the wing root (figure 1). The cause of this and extent within the UK fleet of Eurostar EV-97 aircraft is currently unknown.

As an interim measure and until LSA understands this anomaly, we strongly suggest that you inspect your lower spar caps around the 5th bolt outboard of the wing to fuselage attachment bracket shown in figure 1. The lower attachment should look as in figure 2. If you observe paint cracking or any other difference from that shown in figure 2 DO NOT FLY the aircraft. After inspection inform LSA of your findings by phone or email even if you find no differences. Please do not disturb the paint if you discover anything suspicious, as this could destroy any evidence present. A simple questionnaire is attached. Your feedback will enable LSA to evaluate the extent and occurrence of this anomaly.

To inspect the wings of your aircraft in situ, firstly remove the top and bottom wing fairings. Access to the spar cap can then be gained through the rear lightening hole on the inboard rib (figure 3 ). A camera can be inserted through the lightning hole to take a picture of the area. To prevent the camera from falling into the wing attach a lanyard or similar restraint to enable you to retrieve the camera in the event that you do drop it. Alternatively a good quality borescope can be used to view the area.

Until further information is available on this issue, owners are reminded that they must always observe the loading and speed limitations, particularly in turbulent conditions. They are put in place for good reasons.

Light Sport Aviation is actively working with authorities to understand this anomaly and will contact all owners as soon as more information is available.

The full service bulletin can be seen here


Cracking in the paintwork is evident


There’s no cracking evident in this photo


A mobile phone camera or good quality borescope can be used to inspect the affected area

CASA in Australia lift Jabiru restrictions

Limitations on the use of Jabiru engines have been lifted by Australia’s Civil Aviation Safety Authority (CASA) following a 20-month investigation into a series of engine failures. The problems were through bolt and valve train failures in the Jabiru fleet in Australia, where the aircraft is frequently used for flight training. CASA says that stock Jabiru engines maintained in strict accordance with Jabiru service bulletins and maintenance instructions are no longer affected by the limitations, which were issued in late 2014. The full report can be read HERE

Tellus Survey – July 2016

Tellus is a ground and airborne geoscience mapping programme, collecting chemical and geophysical data that will inform the management of Ireland’s environment and natural resources. The aircraft operates at low altitude, if you plan on flying in the area check the Tellus website for details of the aircrafts location –

Airborne survey of Galway, Mayo and neighbouring parts of Roscommon, Offaly, Clare and Tipperary is underway. Survey is 27% complete.



The NMAI AGM will take place in The Irish Parachute Club, Clonbullogue, Co. Offaly on Sunday 08/05/2016. Every member is requested to attend this meeting as there are a few changes coming and we want you all to have you say . Can members also inform us if you intend on flying to this event as we will have to arrange aircraft parking. If attending by air please text Mark Brereton on 087 6617115 just to let us know.

The AGM is your chance to improve how your sport is run. The NMAI Committee work hard to keep the sport safe and we are rapidly growing, with more and more aircraft joining our books each week, so attend and show your support.
If the weather is good there will be a BBQ in Limetree Airfield later on that evening and all are welcome to attend.

Low flying Survey Aircraft over Waterford

Tellus Aircraft ImageThe latest phase of the survey involves a Twin Otter aircraft flying at a low height over eastern Waterford, parts of southern Tipperary, Kilkenny and western Wexford and will be in the air from mid-April 2016 for 3-4 weeks (weather permitting). The Tellus website – – is updated weekly with the planned flight schedule.

The aircraft will fly at a low level, around 200ft, over rural areas, rising to 800ft over urban areas. While in most cases this aircraft will be operating beneath our normal operating altitudes, a good look out will be required during approach and landing, especially if you are operating in and out of unmarked strips.

The Tellus team is delivering an ongoing communications campaign in the region. If you have any concerns about the survey you can contact the Tellus Freephone information line on 1800 303 516 or visit You can also follow Tellus on twitter, @TellusGSI

Click Map to see in full size

Tellus Waterford Map_sm

New NMAI Procedures Manual

Version 7.1 of the NMAI Procedures Manual has just been approved by the IAA. There are no significant changes but all owners and inspectors should study the changes to see if it has an impact on their aircraft. The latest version can be downloaded from the Documents section.

Inspectors Meeting Cancellation

Due to unforeseen circumstances, the Inspectors Meeting scheduled for the 7th of November has been postponed. A new date will be issued shortly. Apologies for any inconvenience caused to our inspectors and members.

Class II Medical

Class II Medicals will be available on Saturday, the 31st of October in Abbeyshrule Aerodrome. Places are limited, so contact Mark Brereton on 0876617115 or by email to to reserve a place.

Registration Marks

Notice to all aircraft owners – please ensure that the registration marks on your aircraft adhere to the guidelines. In particular, the hyphen should be two-thirds the height of the general letters and the markings under the wing need to read from left to right, and be at least 50cm in height. If you are changing the registration marks of your aircraft in the near future, consult IAA (Nationality and Registration Order) SI number 107 of 2015. This document is available on the IAA website, or simply follow the link [Go to pages 16-17]: