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MSB817-70 Inspection of tail mounting bracket G 109 / G 109B

GROB G-109 · Service Bulletins

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Overview

This document is a service bulletin (MSB817-70) issued by Grob Aircraft AG, detailing mandatory inspection procedures for the tail mounting bracket of the G 109 and G 109B aircraft. It addresses safety concerns related to potential loss of rudder control due to a broken pivot in the tail mounting bracket.

  • Mandatory inspection of tail mounting bracket for G 109 and G 109B aircraft.
  • Inspection required within the next 100 flight hours or annual inspection, by March 31, 2017.
  • Reports of broken pivot leading to loss of rudder control prompted this bulletin.
  • Instructions must be certified in the logbook by authorized personnel.
  • Repeat inspection every 100 flight hours or with annual inspection.
  • Contact Grob Aircraft for support and questions.
  • No changes to aircraft configuration are required.
  • Document approved under EASA Design Organization Approval.

Document

Source

Originally published by grob-aircraft.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.

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Document details

Type
·
Service Bulletins
Year
·
2016
File size
·
142 KB
Publisher
·
grob-aircraft.com
Language
·
en
About this document
What is the MSB817-70 Inspection of tail mounting bracket G 109 / G 109B?

The MSB817-70 Inspection of tail mounting bracket G 109 / G 109B is a service bulletins for the GROB G-109, dated 2016.

Where does the MSB817-70 Inspection of tail mounting bracket G 109 / G 109B come from?

This copy of the MSB817-70 Inspection of tail mounting bracket G 109 / G 109B was originally published by grob-aircraft.com and is hosted on Sprinkle as a free, searchable reference copy.

What year was the MSB817-70 Inspection of tail mounting bracket G 109 / G 109B published?

The MSB817-70 Inspection of tail mounting bracket G 109 / G 109B — the GROB G-109 service bulletins on file — is dated 2016.

Documentation completeness
1/7

Most owners only have the POH. Here's the essential set for the GROB G-109.

  • Pilot's Operating Handbook / AFM
  • Checklist
  • Maintenance Manual
  • Parts Catalog (IPC)
  • Systems & Wiring
  • Service Bulletins on file
  • Type Certificate (TCDS)

More GROB G-109manuals & documents

In this document

Technical Details

The bulletin outlines the mandatory inspection of the tail mounting bracket due to safety concerns, specifying affected aircraft and compliance timelines.

Accomplishment – Instructions

Step-by-step instructions for inspecting and potentially replacing components of the tail mounting bracket are provided.

Planning Information

Details on materials required for the inspection and references to maintenance manuals are included.

Remarks

Instructions must be certified by authorized personnel, and information should be forwarded to new aircraft owners if sold.

Safety notes

  • Failure to comply with the inspection may lead to loss of rudder control.
  • Inspection must be performed by authorized personnel.
  • Damage found during inspection must be addressed before the next flight.

Full document text

MSB817-70 Page 1 of 6 28 Sep. 2016 Replaces Issue: - 817-70 Inspection of tail mounting bracket G 109 / G 109B Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies SERVICE BULLETIN NO. / TECHNISCHE MITTEILUNG NR. MSB817-70 I. TECHNICAL DETAILS 1.1 Category / Kategorie: Mandatory Vorgeschrieben Note: GROB issues Service Bulletins of category Mandatory (MSBs), if the information or instructions have a precautionary or safety intent either related to design or conformity and to publish revisions of manuals (AFM, AMM, IPC). However, according to Article 20 (1) of Regulation (EC) No. 216/2008, only EASA may issue mandatory information, in the form of an Airworthiness Directive (AD), in order to react to a given safety problem. Service Bulletins classified Mandatory issued by GROB´s design organisation do not have a legally mandatory character equivalent to an AD, cannot have enforcement implications and, therefore, serve as information or instruction by GROB only. This also applies to cases where a Service Bulletin is published in anticipation of an AD. 1.2 Airplanes affected / Betroffene Flugzeuge: G 109, all S/N G 109, alle W/N G 109B, all S/N G 109B, alle W/N 1.3 Time of Compliance / Dringlichkeit: Within next 100 FH inspection or next annual inspection, whichever comes first, but not later than 31 th March 2017 Mit der nächsten 100 FH Inspektion oder bei der nächsten JNP, je nachdem, was zuerst eintrifft, aber nicht später als 31. März 2017 1.4 Subject / Gegenstand: ATA 32-20 Tail gear ATA 32-20 Spornfahrwerk Inspection of tail mounting bracket Inspektion des Spornbockes MSB817-70 Page 2 of 6 28 Sep. 2016 Replaces Issue: - 817-70 Inspection of tail mounting bracket G 109 / G 109B Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies 1.5 Reason / Grund: GROB received two reports about a broken pivot of the tail mounting bracket, see Figure 1. This led to a loss of rudder control in flight. This Service Bulletin mandates an inspection of the tail mounting bracket. The configuration of the aircraft is not affected by this Service Bulletin. GROB erhielt zwei Meldungen über eine gebrochene Achse am Spornbock, siehe Figure 1. Dies führte zum Verlust der Seitenruderkontrolle im Flug. Diese Technische Mitteilung verlangt eine Inspektion des Spornbockes. Die Konfiguration des Luftfahrzeuges ist durch diese Technische Mitteilung nicht betroffen. Figure 1 MSB817-70 Page 3 of 6 28 Sep. 2016 Replaces Issue: - 817-70 Inspection of tail mounting bracket G 109 / G 109B Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies 1.6 Concurrent Documents / Mitgeltende Unterlagen: Maintenance Manual G 109/ G 109B (AMM) Illustrated Parts Catalogue G 109/G 109B Wartungshandbuch G 109/ G 109B (WHB) RI-817-15 1.7 Approval Note / Genehmigungsvermerk: The technical content of this document is approved under the authority of EASA Design Organization Approval No. EASA.21J.030. 1.8 Accomplishment – Instructions / Durchführung – Anweisungen 1.8.1 Ensure that the aircraft is safe for parking I.A.W. AMM Sicherstellen, dass das Flugzeug sicher abgestellt ist, gemäss WHB. 1.8.1 Remove the rudder and the rudder drive-rod from rear lever 109-2807 (item 310 of Figure 2). Remove M8 self-locking nut from rear mounting bracket (item 280 of Figure 2). Remove lever 109-2807 with pull springs (refer to Figure 2) Seitenruder ausbauen, Seitenruderantrieb am hinterem Hebel 109-2807 (Pos. 310 in Figure 2) aushängen. ln hinterer Spornbocklagerung M8-Stopmutter lösen (Pos. 280 in Figure 2). Hebel 109-2807 mit Zugfedern abnehmen (siehe Figure 2). 1.8.2 Check the ball bearing in the lever 109-2807 for smooth running. If required, replace the bearing (item 1 of 2.2) and do repair instruction RI- 817-15 before next flight. Kugellager in Hebel 109-2807 auf Leichtgängigkeit prüfen. Bei Beanstandung, Kugellager (lfd.Nr. 1 aus 2.2) tauschen und vor dem nächsten Flug Reparaturanleitung RI-817-15 durchführen. 1.8.3 Inspect the rear bolt of the mounting bracket for damage, especially corrosion and brush marks. If damage is found, do repair instruction RI-817-15 before next flight. Hintere Schraube im Spornbock auf Beschädigung, wie z.B. Korrosion und Schleifmarken, prüfen. Bei Beschädigung, vor dem nächsten Flug Reparaturanleitung RI-817-15 durchführen. 1.8.4 Assemble in reverse order. Tighten the nut (item 2 of 2.2) with a maximum torque of 16Nm. In umgekehrter Reihenfolge zusammenbauen. Ziehen Sie die Mutter (lfd. Nr. 2 aus 2.2) mit einem maximalen Drehmoment von 16Nm an. 1.8.5 Return aircraft to service. Flugzeug wieder freigeben. MSB817-70 Page 4 of 6 28 Sep. 2016 Replaces Issue: - 817-70 Inspection of tail mounting bracket G 109 / G 109B Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies Figure 2 1.9 Repetitive Action / Wiederkehrende Massnahmen Repeat this inspection every 100FH or with annual inspection, whichever comes first. I. Make a handwritten note in the AMM until next revision of the AMM. Inspektion alle 100 Flugstunden oder bei der nächsten JNP wiederholen, je nachdem, was zuerst eintrifft. Machen Sie einen handschriftlichen Eintrag im WHB, bis zur nächsten Revision des Handbuches. Check here Hier prüfen MSB817-70 Page 5 of 6 28 Sep. 2016 Replaces Issue: - 817-70 Inspection of tail mounting bracket G 109 / G 109B Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies II. PLANNING INFORMATION 2.1 Weight and CG / Gewicht und Schwerpunktlagen N/A Nicht betroffen 2.2 Material and Availability / Material und Verfügbarkeit Item Lfd.Nr. P/N Teilenummer Description Bezeichnung Qty. / A/C Anz / Lfz 1 608-2RSH or 608-2RSL (SKF) Deep groove ball bearing Rillenkugellager 2 2 LN9348 M8 Self-locking Nut Stopmutter 1 2.2 Special Tools / Spezialwerkzeuge N/A Nicht betroffen 2.3 Labor costs / Arbeitsaufwand n/a Nicht verfügbar 2.4 Reference documents / Referenzunterlagen

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Maintenance Manual G 109/ G 109B Illustrated Parts Catalogue G 109/G 109B Wartungshandbuch G 109/ G 109B 2.5 Credit / Vergütung N/A Nicht zutreffend MSB817-70 Page 6 of 6 28 Sep. 2016 Replaces Issue: - 817-70 Inspection of tail mounting bracket G 109 / G 109B Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies III. REMARKS / SONSTIGES The instructions in paragraph 1.8 have to be accomplished and certified in the logbook by authorized staff: - in EASA countries according to EASA Part 66 - in non-EASA countries according to national regulations with respect to maintenance. If you have sold your aircraft in the meantime, we kindly ask you to forward this information to the new owner and to provide us with the name and address of the new owner as well as with the respective serial number. For questions and assistance please contact: Die Anweisungen in Kapitel 1.8 sind durch autorisiertes Personal durchzuführen und im Bordbuch zu bestätigen: - in EASA-Staaten gemäss EASA Teil 66 - in nicht EASA-Staaten gemäss nationaler Vorschriften bezüglich Wartung Sollten Sie Ihr Flugzeug in der Zwischenzeit verkauft haben, bitten wir Sie, diese Mitteilung an den neuen Besitzer weiterzuleiten und uns Name und Anschrift des neuen Besitzers sowie die betreffende Werknummer mitzuteilen. Für Rückfragen und Unterstützung wenden Sie sich bitte an: Product Support, phone: +49 8268 998105 fax: +49 8268 998200 e-mail: productsupport@grob-aircraft.com