MSB1078-19611 

Page 1 of 9 

01 December 2014 

Replaces Issue: 14 July 2014 

SERVICE BULLETIN NO. MSB1078-196/1 

I. TECHNICAL DETAILS 

1.1 Category: 

Mandatory 

Note: GROB issues Service Bulletins of category Mandatory (MSBs), if the information or 

instructions have a 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. 21612008, 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 impl ications 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. 

Note: This service bulletin is issued in anticipation of an AD. Issue of an AD will not 

necessarily lead to revision of this service bulletin. 

1.2 Airplanes affected: 

G 115E all SIN 

G 115EG all SIN 

1.3 Time of Compliance: 

Part A: Before next IFR or VFR Night flight, or within next SOFH, whichever comes first, unless 

already accomplished under MSB 1078-196 at initial issue. 

Part B: Within 100 flight hours or next 100 or 200 hours inspection, whichever comes first. 

1.4 Subject: 

AT A-Code: 80-00 Starting 

Inspection of starter solenoid and Installation of Starter Relay. 

1.5 Reason: 

Grob received a report about a total loss of electrical power in IMC. Root cause was found to be 

a defect starter solenoid. The starter solenoid had an internal defect causing a short circuit. The 

defect cannot be detected by visual inspection. 

This Service Bulletin is intended to prevent an unsafe condition. The configuration of the aircraft 

is affected by Part B of this Service Bulletin. 

1.6 Concurrent documents: · 

Corresponding AMM 

1078-196_1 MSB, Inspection of starter solenoid and Installation or Starter Relay G 115E, EG 

Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies 
MSB1078-196/1 

Page 2 of9 GR B 

01 December 2014 

Replaces Issue: 14 July 2014 AIRCRAFT 

1.7 Approval Note: 

The technical content of this document is approved under the authority of EASA Design 

Organization Approval No. EASA.21J.030. 

These information or instructions relate to change no. MAM 1078-187 which has been approved 

by the Authority (EASA) under approval no. 10051624. 

1.8 Accomplishment/Instructions 

Note: The AMM references in this Service Bulletin are for G 115E. For G 115EG use the 

relevant Job Guide. 

Part A One-time Inspection 

1.8.1 Disconnect the aircraft battery, refer to AMM Chapter 24-30. 

1.8.2 Remove the Engine Cowlings, refer to AMM Chapter 71-10. 

1.8.3 Visually inspect the starter. Make sure that the power connection bolts have the same 

length, refer to Figure 1 for defective item and Figure 2 for correct installation. 

Figure 1: Incorrect connection bolts Figure 2: Correct installation 

1.8.4 Release the two bolts on the starter solenoid. Carefully pull the solenoid away from the 

starter housing until the dead stop. Make sure that the solenoid plunger is still attached, 

refer to Figure 3. Attach the solenoid to the starter with the two bolts. 

1078-196_ 1 MS8,1r.speclion ol starter solenoid and Installation of $tarter Relay G 11 5E, EG 

Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies 
MSB1078-196/1 

Page 3 of9 

01 December 2014 

Replaces Issue: 14 July 2014 

Figure 3: Starter solenoid at dead stop 

1.8.5 If the starter is OK, do step 1.8.7. 

1.8.6 If the starter is not OK or in case of doubt, replace the Starter. 

1.8.7 Install the Engine Cowlings, refer to AMM Chapter 71-10. 

1.8.8 Connect the aircraft battery, refer to AMM Chapter 24-30. 

1.8.9 For G 115E approved for IFR: Make and install a placard "IFR operation in VMC only", 

refer to Figure 4. 

- .,. O~lJiiD il'l)O 

[ G-BTAS I 

Figure 4: Limitation placard 

1.8.1 0 Release aircraft into service according to national requirements. 

1078-196 _1 MS8, InspectiOn of starter solenoid and lnstaRation ol Slartor Relay G 115E, EG 

Grab Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies 
MSB1078-196/1 

Page 4 of 9 

01 December 2014 

Replaces Issue: 14 July 2014 

Part B Installation of Starter Relay (Terminating action) 

1.8.1 Disconnect the aircraft battery, refer to AMM Chapter 24-30. 

1.8.2 Remove the Engine Cowlings, refer to AMM Chapter 71-10. 

1.8.3 Disconnect the spark plug cables from the spark plugs. 

1.8.4 Remove the cooling air hose from the oil cooler. 

GROB 

AIRCRAFT 

1.8.5 Remove the U-bolts which holds the top and the bottom of the oil cooler to the mounting 

plate. 

1.8.6 Remove the shroud and move the oil cooler to one side. 

1.8. 7 Remove the screws that attach the Start Control Relay to the mounting plate. 

1.8.8 Disconnect the wires from the relay and cut the terminals from the wires. Discard the 

Start Control Relay. 

1.8.9 Drill a 5mm hole in the relay mounting plate, 35mm below forward hole of the old Start 

Control Relay. Countersink hole for a M5 screw. Refer to Figure 5. 

Attach the starter relay (item 1 of List 2.2) so that the terminals point forward, refer to . 

Use 2x M5 screw, washers and nuts (Items 2, 3 and 4 of List 2.2). 

@ 

@ @ 

New hole 

Figure 6 

0 

Figure 5 

1.8.1 0 Remove the cable KA 01 E16-E. Cut the wax strings/ty-wraps and release the P-clips, 

where necessary. Disconnect the cable at the starter solenoid. 

1.8.11 Install the jumper cable (item 5 of List 2.2) on the starter solenoid, refer to wiring 

diagram. 

1.8.12 Cap and stow cable KA 03K16-P near the removed starter control relay (Item 6 of List 

2.2). 

1.8.13 Disconnect the cable PA 03G06-E at the firewall and the starter motor. Keep the two 

rubber caps and discard the cable. 

1078-196_1 MSB. Inspection of starter solenoid and lnS1allaticn of Slarter Relay G 115E, EG 

Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies 
MSB1078-196/1 

Page 5 of 9 

01 December 2014 

Replaces Issue: 14 July 2014 AIRCRAFT 

1.8.14 Apply one of the rubber caps to the new cable PA 03K06-E (Item 7 of List 2.2) and 

connect it to the starter motor. Cap the contact and put the cable along the cable loom to 

the new Starter Relay. Install P-clips and ty-wraps as required. 

1.8.15 Apply one of the rubber caps to the new cable PA 03G06-E (Item 8 of List 2.2) and 

connect it to the firewall terminal. Cap the contact and put the cable to the new Starter 

Relay. 

1.8.16 Crimp one new terminal (item 9 of List 2.2) on the two cables KA 02F20-E and 

KA 02G20-E. Crimp a new terminal (item 10 of List 2.2) on the cable KA 04F20N-P. 

1.8.17 Apply two new rubber caps (item 11 of List 2.2) to the cables and connect them to the 

new starter relay, refer to Figure 7. Cap the contacts. 

Figure 7 

1.8.18 Safety the cables with cable ties, where necessary. 

1.8.19 Put the oil cooler/shroud in position. Install the U-bolts which holds the top and the 

bottom of the oil cooler to the mounting plate. Use four new nuts (Item 4 of List 2.2) with 

the original washers. 

1.8.20 Install the cooling air hose to the oil cooler. 

1.8.21 Install the Engine Cowlings, refer to AMM Chapter 71 -10. 

1.8.22 Release the rear equipment compartment panel for access, refer to AMM 

Chapter 25-1 0. 

1.8.23 Disconnect the External Power Control Relay from its socket (Item 60 of Figure 8). 

1.8.24 Remove the bolt that attaches the External Power Control Relay Socket (Item 30 of 

Figure 8). Remove the bolt that attaches the P-clamp (Item 80 of Figure 8). 

1.8.25 Attach the new fuse holder (Item 12 of List 2.2) to the new fuse bracket (Item 13 of List 

2.2) with screws, washers and nuts (Items 14 thru 16 of List 2.2). 

1.8.26 Install the new fuse bracket with the bolts that attach the External Power Control Relay 

Socket and the P-clamp. Use a longer bolt for the External Power Control Relay Socket. 

(Item 17 of List 2.2). 

1.8.27 Disconnect the cable PA 03F06-E from the battery relay. 

1.8.28 Apply two new rubber caps (item 11 of List 2.2) to the new cable PA 03L06-E (Item 18 of 

List 2.2). Connect it to the battery relay and the rear bolt of the new fuse, refer to Figure 

9 and Figure 10. Cap the contacts. 

1.8.29 Connect the cable PA 03F06-E to front bolt of the new fuse holder, refer to Figure 10. 

Install a 150A Fuse (Item 19 of List 2.2) and tighten the attaching nuts. 

1078-196_1 MSS. Inspection or s1a11er solenoid and lnslallation of Starter Relay G 115E, EG 

Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies 
MSB1078-196/1 

Page 6 of9 

01 December 2014 ll~ GROB 

Replaces Issue: 14 July 2014 AIRCRAFT 

1.8.30 Cut the cable ties on the front edge of the External Power Assy, refer to Figure 10. 

Install the edge protection on the front edge (Item 20 of List 2.2). 

1.8.31 Safety the cables with cable ties, where necessary. 

1.8.32 Connect the External Power Control Relay to its socket. 

13.1\ 1 II I ~y l I M II f r.( 

~~~I' A 

0 0 

1 '>OA 

Figure 8 

PJ\ 0.$~06 • 

'-'A 1 /I 7/ I 

ll.i\11 r RY f~l I ,1\V I - I , /PJ\ I 

0 q I 

RH " r " HHoV I ' 

I 

Figure 9 

1078-196_1 M$8. Inspection or starter solenoid and Installation or Starter Relay 

PJ\ 0/1 06 I' 

i 1 J\ 0/ // I) 

1>,1\ l.)f// ! 

G 115E, EG 

Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies 
MSB1078-196/1 

Page 7 of9 

01 December 2014 

Replaces Issue: 14 July 2014 

PA 03F06-E 

New edge 

protection 

Figure 10 

1.8.33 Connect the aircraft battery, refer to AMM Chapter 24-30. 

PA 03L06-E 

1.8.34 Install the rear equipment compartment panel for access, refer to AMM Chapter 25-10. 

1.8.35 Do an engine run-up, refer to AMM Chapter 71-00. 

1.8.36 For G 115E: remove and discard the placard "IFR operation in VMC only". 

1.8.37 Release aircraft into service according to national requirements. 

1.9 Repetitive Actions 

none 

1078-196_1 MSS, Inspection of starter solenoid and Installation of Starter Relay G 115E, EG 

Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies 
MSB1078-196/1 

Page 8 of9 

01 December 2014 

Replaces Issue: 14 July 2014 

GROB 

AIRCRAFT 

II. PLANNING INFORMATION 

2.1 Weight and CG 

N/A 

2.2 Material and Availability 

Part B· 

Item PIN Description Qty.l AIC 

1 GS246001-9 Starter Relay 1 

2 DIN965-A2-5x14 Screw 2 

3 DIN 125A-A2-5.3 Washers 2 

4 DIN985-A2-5 Nut 6 

5 115E-9510.03 Jumper cable 1 

6 GS247009-2-32 TC Cap, red 1 

115E-9510.02 PA 03K06-E (for 82086/E- 82184/E) 

7 PA 03K06-E 1 115E-9510.02/1 (for 82301/E- 82323/E and model G 115EG) 

115E-951 0.01 PA 03G06-E 

8 (for 82086/E- 82184/E and model G 115EG) 1 

115E-9510.01/1 PA 03G06-E (for 82301/E- 82323/E) 

9 MS 25036-153 Terminal, Blue 1 

10 MS 25036-149 Terminal, Red 1 

11 MS 25171-3S Rubber Caps 4 

12 MS28934-1 Fuse holder 1 

13 115E-9332 Fuse Bracket 1 

14 DIN 965-A2-5x25 Screw 2 

15 DIN9021-A2-5,3 Washer 2 

16 DIN985-A2-05 Nut 2 

17 DIN933-A2-4x14 Bolt 1 

18 115E-94 70.01 PA 03L06-E 1 

19 MS28936-150 150A Fuse 1 

20 GS510118-1-120 Cellular Rubber Sealing 1 

2.3 Special Tools 

Part B: 

Item PIN Description 

1 TYCO 169400-0 (or equivalent) Crimping tool 

2 AMP 169404 (or equivalent) Positioner for TYCO 169400-0 

2.4 Labor costs 

NIA 

2.5 Reference documents 

Corresponding AMM and IPC 

2.6 Credit 

N/A 

1078-196_1 MSS. lnspeetlon of starter sorenoo<r and Installation of Starter Relay G 115E, EG 

Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies 
MSB 1078-196/1 

Page 9 of9 

01 December 2014 a,GROB 

Replaces Issue: 14 July 2014 A I RCRAFT 

Ill. REMARKS 

The instructions in paragraph 1.8 have to be accomplished and certified in the logbook by 

authorized staff: 

- in EASA countries according to Article 5 VO EG 2042/03 (VO EG 1056/2008) Appendix IllPart 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: 

phone: 

fax: 

e-mail: 

Product Support, 

+49 8268 998105 

+49 8268 998200 

productsupport@grob-aircraft.com 

1078-196_1 MS8. lnspectJCn of starter solef>oid and Installation of Starter Relay G 115E, EG 

Grob Aircraft AG, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies