### MSB1078- 19611 Page 1 of 9 01 December 2014 Replaces Issue : 1 4 Ju ly 2014 

# SERV I CE BULLET IN NO. MSB1078-196/1 I. TECH NI CAL DETAILS 1 .1 Category: Mandatory 

### Note : GROB issu es Service Bulletins of category Mandatory (MSBs) , if the information or instructions have a safety i ntent either re lated to design or conform ity an d to pub l ish rev is ions of manuals (AFM, AMM , IPC) . Howeve r, accord i ng to Article 20 (1) of Regulati on (EC) No . 21612008, only EASA may issue mandatory i nfo r mation , in the form of an Airworth i ness Directive (AD) , i n order to react to a given safety prob lem . Service Bullet i ns classified Mandatory issued by GROB's design organisat ion do not have a legally mandatory character equiva lent to an AD, cannot have enforcement im pl ications a nd , the refore, serve as in formation or instructio n by GROB on l y. Th is also applies to cases where a Service Bulletin i s pub l ished i n anti cipation of an AD . 

### Note : This service bulletin i s issued in anticipati on of an AD . I ssue of an AD wi ll not necessa ril y l ead to revi s io n of this service bulletin. 

### 1 .2 Airp lanes affected: G 115E all 

### SIN G 115 E G all 

### SIN 

### 1 . 3 Time of Comp l iance : Part A: 

### Before next I F R or VFR Night flight, or with i n next SO F H , wh ichever comes first , unless already acco m p l i shed under MSB 1078- 196 at i n itia l issue . Part B: 

### Within 1 00 fli g ht hours or n ext 100 or 200 hou rs i nspection , wh ichever comes fi rst. 

### 1 .4 Subject : AT A-Code : 80-00 Starting Inspec ti on of starter sol e noid and I nst all atio n of Starter Re lay . 

### 1.5 Reason: G rob received a report a bout a total loss of electrica l power i n IMC. Root cause was found to be a defect starter soleno id. The starter solenoi d had an i nternal defect causing a short circuit. The defect cannot be detected by v isua l i nspectio n. This Service Bu ll et in is in tended to p revent a n unsafe cond ition. The configuration of the aircraft is affected by Part B of th is Service Bulletin. 

### 1 .6 Conc urrent d ocuments: · Corresponding AMM

1 078- 1 96_1 MSB , I nspectio n of starter solenoid a nd I nstallation or Starter Relay 

# G 1 15E, EG Grob Aircraft AG, Lette n bachstrasse 9, D-86874 T ussenhausen - MattsiesMSB1078-196/1 Page 2 of9 

# GR 

# B 01 December 2014 Replaces Issue: 14 July 2014 

### AIRCRAFT 1.7 Approva l Note : The techn ical conte nt of this document is approved under the authority of EASA Design Organization Approval No . EASA.21J.030 . T hese i nformation or instructions relate to change no. MAM 1078- 187 wh ich has been approved by the Authority (EASA) under approval no . 10051624 . 

### 1.8 Accomp l ish me nt/In struction s Note : The AMM references i n th is Service Bu llet i n a re for G 115E. For G 115EG use the relevant Job Gu ide . 

### Part A One-time I nspectio n 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 F igure 1 for defective item and Figure 2 for correct installation .

Figure 1 : Incorrect connection bolts Fig ure 2 : Correct installation 1.8 .4 Release the two bolts on the starter solenoid . Carefu lly pull the solenoid away from the starte r housing until the dead stop . Make sure t hat the soleno id plunger is still attached, refe r to Figure 3 . Attach the soleno id to the starter w ith the two bolts.

10

78- 196 _ 1 MS8,1r .speclion ol starte r sol enoid and Installation o f $tarter Re lay 

# G 11 5E, EG G rob Airc raft AG, Letten bachstrasse 9 , D-86874 Tussenhausen - MattsiesMSB1078-196/1 Page 3 of9 01 December 2014 Replaces Issue : 14 July 2014

Figure 3: Starter so l enoid 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 Insta ll the Engine Cowlings , refer to AMM Chapter 71-10. 1 . 8.8 Connect the a i rcraft battery , refer to AMM Chapter 24-30. 1.8.9 For G 115E approved for I FR : Make and i nstall a placard " IFR operation in VMC only", refer to Figure 4.



# - .,.



## O~lJiiD il'l)O [ G - BTAS 

# I

F igure 4 : Limitation p lacard 1 .8.1 0 Release aircraft into service according to national requirements.

1078-196

_ 1 MS8, InspectiOn of starter solenoid and lns taR

ation ol Slartor Relay 

# G 115E, EG Grab Aircraft AG , Lettenbachstrasse 9 , D-86874 Tussenhausen-MattsiesMSB1078-196/1 Page 4 of 9 01 December 2014 Replaces Issue: 14 July 2014 Part B Installation of Starter Relay (Terminating action) 1.8.1 Disconnect t he aircraft battery, refer to AMM Chapter 24-30 . 1.8.2 Remove the Engine Cowl i ngs, 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 Re lay to the mounting plate . 1 . 8.8 Disconnect the wires from the relay and cut the terminals from t he wires . Discard the Start Control Re lay. 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 forwa rd, 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, Lettenbachst rasse 9, D-86874 Tussenhausen-MattsiesMSB1078-196/1 Page 5 of 9 01 December 2014 Replaces Issue: 14 J uly 2014 

### AIRCRAFT 1.8.14 App ly one of the ru bber caps to the new cable PA 03K06-E (Item 7 of List 2.2) and connect it to the starter moto r. 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 th e ru bber caps to the new cable PA 03G06-E (Item 8 of List 2.2) and connect it to the firewa ll terminal. Cap the contact and put the cable to the new Starter Relay. 1.8.16 Cri mp one new termina l (item 9 of List 2.2) on the two cables KA 02F20-E and KA 02G20 -E. Crimp a new term i nal (i tem 10 of List 2.2) on the cable KA 04 F20N-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 re lay , refer to Figure 7. Cap the contacts.

Figure 7 1 . 8.18 Safety the ca bl es w ith cab l e ties , where necessary. 1 . 8.19 Put the oil coo ler /shroud in position. Install the U-bolts which ho lds the top and the bottom of the oil cooler to the mounti ng plate. Use four new nuts (Item 4 of List 2.2) with the original w ashers. 1 . 8.20 Install the coo ling air hose to the oil cooler . 1 . 8.21 Install the Eng i ne Cowlings, refer to AMM Chapter 71 -10. 1 . 8 . 22 Re lease 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 (I tem 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 Externa l 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) . Con nect it to the battery re lay and the rear bo lt of the new fuse , refer to Figure 9 and Figure 10. Cap th e 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 . 1 078- 1 96 _1 M SS. Inspection or s1a11er solenoid and l nslallation ofStarter Relay 

# G 115E, EG Grob Aircraft AG , Lettenbachstrasse 9, D-86874 Tussenhausen-MattsiesMSB1078-196/1 Page 6 of9 01 December 2014 

# ll~ 

# GROB Replaces Issue : 14 July 2014 

### AIRCRAFT 1 . 8.30 Cut the cable t ies 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 t ies, where necessary . 1.8.32 Connect the External Power Contro l Relay to its socket.

13.1\ 1 II I

**~y** l I MII f r.(

**~~~I'**A 0 0 1 '>OA Figure 8

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**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

1078-1 96_1 M$8. Inspection or starter solenoid and Install ation 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-MattsiesMSB 1 078-196/1 Page 7 of9 01 December 2014 Replaces Issue: 14 Ju ly 2014

PA 03F06-E

New edge protection

Figure 10 1 . 8 . 33 Connect the a i rcraft 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 Action s none

107

8-196

_ 1 MSS, I nspection of s tarter solenoid a nd I nstallation of Starter Relay 

# G 115E, EG Grob A ircraft AG , Lettenbachstrasse 9, D-86874 Tussenha usen-MattsiesMSB1078-196/1 Page 8 of9 01 December 2014 Replaces Iss ue: 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-9470.01 PA 03L06-E 1 19 MS28936-150 150A Fuse 1 20 GS51 0 118-1-120 Cellular Rub ber 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 M SS. lnspeetlon of starter sorenoo<r and Installation of Starter Relay 

# G 115E, EG Grob Aircraft AG, Lettenbachstrasse 9 , D-86874 Tussenhausen-MattsiesMSB 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) Append ix IllPart 66

- in non - EASA countries according to national regulations with respect to maintenance . If you have sold your aircraft in th e meanti me , we kind ly ask you to forward th i s i nformation to the new owner and to p rovide 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

1078-1 96_1 M S8. l nspectJCn of starter solef>oid and Installation of Starter R elay 

# G 115E, EG Grob Aircraft AG, Lettenbachstrasse 9 , D-86874 Tussenhausen-Mattsies