Service Bulletin No: 34-038 Date: Mar 26/13

Rev No. Date: Page 1 of 18

Service Bulletin No: 34-038 Ref No: 305

Modification No: EC-13-0125 ATA Chapter: 34

SERVICE BULLETIN

PILATUS AIRCRAFT LTD, STANS, SWITZERLAND

NAVIGATION - ATTITUDE AND DIRECTION

MODIFICATION TO THE ELECTRONIC STANDBY INSTRUMENT-SYSTEM (ESIS) POWER RETURN 

WIRES

1. Planning Information

A. Effectivity

PC-12/47E Series aircraft MSN 545, 1001 thru 1450.

MSN 1451 and up will have this modification incorporated during production.

NOTE: Throughout this Service Bulletin, Config. 1 aircraft are MSN 545 and MSN 1001 thru 

MSN 1270. Config. 2 aircraft are MSN 1271 thru MSN 1450.

B. Concurrent Requirements

None.

C. Reason

In order to minimize any possibility that the Apex displays can be affected together with the ESIS, 

the ESIS ground connection is relocated, improving isolation and separation from the main 

displays.

D. Description

This Service Bulletin gives the data and instructions necessary to do a modification to change the 

ground connection for the ESIS.

E. Compliance

Mandatory.

Accomplishment required not later than May 31/2013.
Service Bulletin No: 34-038 Date: Mar 26/13

Rev No. Date: Page 2 of 18

SERVICE BULLETIN

F. Approval

The technical content of this document is approved under the authority of DOA No. EASA. 21J. 

357.

PILATUS advises Operators/Owners to check with their designated Airworthiness Authority for 

any changes, local regulations or sanctions that may affect the embodiment of this Service 

Bulletin.

G. Copyright

© Pilatus Aircraft Ltd. This document contains proprietary information that is protected by 

copyright. All rights are reserved. No part of this document may be copied, reproduced or 

translated to other languages without the prior written consent of Pilatus Aircraft Ltd.

H. Manpower

I. Weight and Balance

(1) Weight change:

None.

(2) Moment change:

None.

J. Electrical load Data

Not changed.

K. Software

Not changed.

L. References

Aircraft Maintenance Manual (AMM): 12-B-20-20-01-00A-040A-A, 12-B-20-31-00-00A-070A-A, 

12-B-25-10-03-00A-920A-A, 12-B-34-26-40-00A-903A-A or 12-B-34-26-40-00A-903B-A, 

12-B-46-30-00-00A-903A-A,12-B-46-30-01-00A-920A-A, 12-B-46-30-03-00A-920A-A.

M. Publications Affected

Wiring Diagram Manual (WDM).

Task Man-hours

(With Ground Point 

Ready)

Man-hours

(Without Ground Point 

Ready)

Preparation 0.50 0.50

Modification 2.50 2.75

Close-Up 1.25 1.25

TOTAL MAN-HOURS 4.25 4.50
Service Bulletin No: 34-038 Date:Mar 26/13

Rev No. Date: Page 3 of 18

SERVICE BULLETIN

N. Interchangeability of Parts

One way interchangeable. Pre Service Bulletin parts must not be installed on Post Service 

Bulletin aircraft.
Service Bulletin No: 34-038 Date: Mar 26/13

Rev No. Date: Page 4 of 18

SERVICE BULLETIN

2. Material Information

A. Material - Price and Availability:

If you require more information about this modification, please contact us as follows: 

PILATUS AIRCRAFT LTD.,

CUSTOMER SUPPORT MANAGER,

CH-6371 STANS,

SWITZERLAND

General Aviation:

Tel: + 41 41 619 3333

Fax: + 41 41 619 7311

eMail: SupportPC12@pilatus-aircraft.com

PILATUS BUSINESS AIRCRAFT LTD.,

PRODUCT SUPPORT DEPARTMENT

11755 AIRPORT WAY

BROOMFIELD, CO 80021.

UNITED STATES OF AMERICA

Tel: +1 303 465 9099

Fax: +1 303 465 6040

eMail: Productsupport@PilBal.com

PILATUS AUSTRALIA (PTY.) LTD,

17 JAMES SCHOFIELD DRIVE,

ADELAIDE AIRPORT SA 5950,

AUSTRALIA

Tel: +61 (8) 8234 4433

Fax: +61 (8) 8234 4499

eMail: supportpc12@pilatus.com.au

Operators are requested to advise Pilatus Aircraft Ltd, of the Manufacturer’s Serial Number 

(MSN) and the flying hours of aircraft which are affected by this Service Bulletin.

500.51.12.030 Contact address above Contact address above

B. Warranty

Pilatus agrees to cover the costs for parts and labor of affected aircraft provided the work is 

accomplished by an Authorized Service Center within 6 months from the issue date of this 

Service Bulletin.

Modification Kit Number Price Availability
Service Bulletin No: 34-038 Date:Mar 26/13

Rev No. Date: Page 5 of 18

SERVICE BULLETIN

C. Material Necessary for one Aircraft

Modification Kit No. 500.51.12.030 has these parts: 

New Part No. Description Old Part No. Qty Disp. 

Code

Fig Item

591.30.12.031 GROUND STUD 12 - 1 - 1 1

511.36.12.986 PLACARD (GS125) - 1 - 1 8

971.31.18.830 TERMINAL LUG - 2 - 1 2

938.07.68.304 NUT - 2 - 1 4

10

938.77.11.112 WASHER - 2 - 1 3

9

971.32.18.105 RETAINING CLIP - 3 - 1 6

919.79.41.302 WIRE, (F4H22N) 

1500 MM AWG22

- 1 3 -

971.42.31.535 PIN MODULE - 1 3 -

NOTE: Config 1 aircraft requires new wire (P/N 919.79.41.302) and pin module (P/N 

971.42.31.535).

NOTE: Config 2 aircraft only require one terminal lug (P/N 971.31.18.830).

NOTE: Part Numbers given in this Service Bulletin are correct at the time of approval. Pilatus 

Aircraft Ltd. reserves the right to change the part numbers as necessary. Part numbers 

of items delivered are correct when the part is dispatched.

Disposition Codes: N - New / D - Discard / R - Return to Pilatus 
Service Bulletin No: 34-038 Date: Mar 26/13

Rev No. Date: Page 6 of 18

SERVICE BULLETIN

D. Operator Supplied Materials (AMM 12-B-20-31-00-00A-070A-A) 

MATERIAL NO. DESCRIPTION QTY REMARKS

P01-010 SOLVENT A/R Or equivalent

P02-031 ABSORBENT PAPER A/R Or equivalent

P07-021 ALODINE 1132 TOUCH-NPREP PENA/R Or equivalent

P08-076

Alternative 

P07-007

MASKING VARNISH

EPOXY PRIMER

A/R

A/R

Glyptal G7526F (P/N 

908.18.12.095)

AKZO NOBEL (P/N 

910.02.05.031)

P09-005 CABLE TIE A/R Or equivalent

P09-008 CABLE TIE A/R Or equivalent

P09-014 CABLE TIE A/R Or equivalent

P09-026 MASKING TAPE A/R Or equivalent

- RED PROTECTIVE TAPE A/R Pilatus P/N 917.40.60.311

- BONDING TESTER 1 Local supply

E. Tooling - Cost and Availability

None.
Service Bulletin No: 34-038 Date:Mar 26/13

Rev No. Date: Page 7 of 18

SERVICE BULLETIN

3. Accomplishment Instructions 

A. Preparation

(1) Remove the left bottom sidewall (Ref. AMM, 12-B-25-10-03-00A-920A-A).

(2) Remove the pilot’s PFD (Ref. AMM, 12-B-46-30-01-00A-920A-A).

(3) Remove the upper MFD (Ref. AMM, 12-B-46-30-03-00A-920A-A).

B. Modification

(1) Disconnect the wires from the ground point (Ref. Fig. 6 - Hook-Up Chart):

(a) Get access to the grounding block GB109 installed on the aft face of FR10. Do this 

through the location for the pilot’s PFD.

(b) For Config. 1 aircraft (Ref. Fig. 2):

1 Locate the wire F6A20N.

2 Disconnect the wire from position 4 of the grounding block GB109 (Ref. Line 

1 of the Hook-Up Chart).

3 Remove the terminal pin from the wire.

4 Locate the wire F4H22N.

5 Disconnect the wire from position 1 of the grounding block GB109 (Ref. Line 

2 of the Hook-Up Chart).

6 Remove the terminal pin from the wire.

(c) For Config. 2 aircraft (Ref. Fig. 4):

1 Locate the wire F81A22N.

2 Disconnect the wire from position 4 of the grounding block GB109 (Ref. Line 

5 of the Hook-Up Chart).

3 Remove the terminal pin from the wire.

(2) Install the ground stud GS125 (Ref. Fig. 1):

(a) Find the hole for the ground stud GS125 (1) (P/N 591.30.12.031) in FR12, LH.

(b) Remove the protective tape, if installed.

(c) If the hole has bare metal surrounding it for 14 mm (0.55 in.) diameter on the 

forward and the aft face, continue this Service Bulletin from Step 3.B.(2)(j).

(d) If the hole does not have bare metal surrounding it for 14 mm (0.55 in.) diameter on 

the forward and the aft face, continue with this Service Bulletin.

(e) Make a mark to show a circle of approximately 14 mm (0.55 in.) diameter on the 

forward face of FR12 with the same center as that of the hole.
Service Bulletin No: 34-038 Date: Mar 26/13

Rev No. Date: Page 8 of 18

SERVICE BULLETIN

(f) Make another mark to show a circle of approximately 14 mm (0.55 in.) diameter on 

the aft face of FR12 with the same center as that of the hole.

(g) Put the masking tape (Material No. P09-026) on the edges of the marked circles on 

the forward and aft faces of FR12.

(h) Remove the surface finish from the area inside the masking tape (Material No. P09-

026) circles.

(i) Remove the masking tape (Material No. P09-026).

(j) Use the absorbent paper (Material No. P02-031) made moist with the solvent 

(Material No. P01-010) to clean:

• The area on the forward face of FR12

• The area on the aft face of FR12.

(k) Apply a layer of Alodine (Material No. P07-021) to:

• The bare area on the forward face of FR12

• The bare area on the aft face of FR12.

(l) Wait approximately 10 minutes.

(m) Put the ground stud GS125 (1) (P/N 591.30.12.031) in position with the stud to the 

front of the aircraft.

(n) Install the washer (9) (P/N 938.77.11.112) and the nut (10) (P/N 938.07.68.304).

(o) Hold the ground stud GS125 (1) (P/N 591.30.12.031) and torque the nut (10) (P/N 

938.07.68.304) to between 2,3 and 2,9 Nm (20 and 25 lb in.).

NOTE: Do not forget to add the run down torque to the value given above (Ref. 

AMM, 12-B-20-20-01-00A-040A-A).

(p) Do an electrical continuity test between the ground stud GS125 and the aircraft 

structure (pilots seat rail or similar). The resistance must be less than 5 mΩ.

(3) Connect the wires to the ground stud GS125 (Ref. Fig. 6 - Hook-Up Chart):

(a) For Config. 1 aircraft (Ref. Fig. 1 and 3):

1 For the wire F6A20N.

a Make a note of the position of the cable ties that attach this wire to 

other wires in the aircraft.

b Cut the cable ties, if necessary, to remove this wire from the other 

wires in the aircraft.

c Route the wire to the ground stud GS125 (1, Fig. 1) (P/N 

591.30.12.031) (Ref. Fig. 3).

d Cut the wire to length and install a terminal lug (2) (P/N 971.31.18.830) 

(Ref. Line 3 of the Hook-Up Chart, Fig. 6).
Service Bulletin No: 34-038 Date:Mar 26/13

Rev No. Date: Page 9 of 18

SERVICE BULLETIN

e Use the cable ties (Material No. P09-005, Material No. P09-008 or 

Material No. P09-014) to attach the cables you released in Step 

3.B.(3)(a)1 b.

2 For the wire F4H22N.

a Make a note of the position of the cable ties that attach this wire to 

other wires in the aircraft.

b Cut the cable ties, if necessary, and remove this wire from the aircraft.

c Install pin module (P/N 971.42.31.535) to the wire (P/N 919.79.41.302) 

and connect to TB109-01 terminal X (Ref. Fig. 3). 

d Route the wire from TB109-01 terminal X to the ground stud GS125 (1, 

Fig. 1) (P/N 591.30.12.031) (Ref. Fig. 3).

e Cut the wire to length and install a terminal lug (2, Fig. 1) (P/N 

971.31.18.830) (Ref. Line 4 of the Hook-Up Chart, Fig. 6).

f Use the cable ties (Material No. P09-005, Material No. P09-008 or 

Material No. P09-014) to attach the cables you released in Step 

3.B.(3)(a)2 b.

3 Put the two terminal lugs (2) (P/N 971.31.18.830) (complete with the wires 

F6A20N and F4H22N) on the ground stud GS125 (1, Fig. 1) (P/N 

591.30.12.031).

4 Install the washer (3) (P/N 938.77.11.112) and the nut (4, Fig. 1) (P/N 

938.07.68.304).

5 Apply a layer of the masking varnish (Material No. P08-076) to both sides of 

the ground stud GS125 (1, Fig. 1) (P/N 591.30.12.031).

6 Put the three retaining clips (6) (P/N 971.32.18.105) in position equally 

spaced along the wires F6A20N and F4H22N between FR11 and FR12, LH.

7 At these positions, wrap a piece of the protective tape (7) (P/N 

917.40.60.311) around the wire F6A20N and the wire F4H22N.

8 Put the three retaining clips (6, Fig. 1) (P/N 971.32.18.105) in position on top 

of the VHF 1 antenna cable.

9 Put the wires F6A20N and F4H22N on top of the three retaining clips (6, Fig. 

1) (P/N 971.32.18.105) and hold everything in position with cable ties (5, Fig. 

1) (Material No. P09-005).
Service Bulletin No: 34-038 Date: Mar 26/13

Rev No. Date: Page 10 of 18

SERVICE BULLETIN

(b) For Config. 2 aircraft (Ref. Fig. 1 and 5):

1 For the wire F81A22N.

a Make a note of the position of the cable ties that attach this wire to 

other wires in the aircraft.

b Cut the cable ties, if necessary, to remove this wire from the other 

wires in the aircraft.

c Route the wire to the ground stud GS125 (1, Fig. 1) (P/N 

591.30.12.031) (Ref. Fig. 5).

d Cut the wire to length and install a terminal lug (2, Fig. 1) (P/N 

971.31.18.830) (Ref. Line 6 of the Hook-Up Chart, Fig. 6).

e Use the cable ties (Material No. P09-005, Material No. P09-008 or 

Material No. P09-014) to attach the cables you released in Step 

3.B.(3)(b)1 b.

2 Put the terminal lug (2, Fig. 1) (P/N 971.31.18.830) (complete with the wire 

F81A22N) on the ground stud GS125 (1, Fig. 1) (P/N 591.30.12.031).

3 Install the washer (3, Fig. 1) (P/N 938.77.11.112) and the nut (4, Fig. 1) (P/N 

938.07.68.304).

4 Apply a layer of the masking varnish (Material No. P08-076) to both sides of 

the ground stud GS125 (1, Fig. 1) (P/N 591.30.12.031).

5 Put the three retaining clips (6, Fig. 1) (P/N 971.32.18.105) in position equally 

spaced along the wire F81A22N between FR11 and FR12, LH.

6 At these positions, wrap a piece of the protective tape (7, Fig. 1) (P/N 

917.40.60.311) around the wire F81A22N.

7 Put the three retaining clips (6, Fig. 1) (P/N 971.32.18.105) in position on top 

of the VHF 1 antenna cable.

8 Put the wire F81A22N on top of the three retaining clips (6) (P/N 

971.32.18.105) and hold everything in position with cable ties (5, Fig. 1) 

(Material No. P09-005).

(4) Install the placard (GS125) (8, Fig. 1) (P/N 511.36.12.986) adjacent to the ground stud 

GS125 (1, Fig. 1) (P/N 591.30.12.031) in a position it can be easily read.

C. Close-Up

(1) Remove all equipment, materials and tools from the work area. Make sure that the work 

area is clean.

(2) Install the upper MFD (Ref. AMM, 12-B-46-30-03-00A-920A-A).

(3) Install the pilot’s PFD (Ref. AMM, 12-B-46-30-01-00A-920A-A).

(4) Do a Power On Check (Ref. AMM, 12-B-46-30-00-00A-903A-A).
Service Bulletin No: 34-038 Date:Mar 26/13

Rev No. Date: Page 11 of 18

SERVICE BULLETIN

(5) Do a test of the ESIS (Ref. AMM, 12-B-34-26-40-00A-903A-A or AMM, 12-B-34-26-40-

00A-903B-A).

(6) Install the left bottom sidewall (Ref. AMM, 12-B-25-10-03-00A-920A-A).

D. Documentation

(1) Record in the aircraft logbook and the Aircraft Flight Manual that this Service Bulletin has 

been accomplished.

(2) Use the Service Bulletin Evaluation Sheet to report your results to PILATUS.
SB2315

1

2

3

4

5

6

7

8

9

10

NOTE: CONFIG. 1 SHOWN

CONFIG. 2 IS THE SAME BUT WITH

ONLY ONE WIRE ATTACHED TO

THE GROUND STUD

FR 12. LH

Service Bulletin No: 34-038 Date: Mar 26/13

Rev No. Date: Page 12 of 18

SERVICE BULLETIN

 Installation of the Ground Stud GS125

Figure 1
Sansome Clive

Johnson Mark ECAHoler Daniel

Service Bulletin No: 34-038 Date:Mar 26/13

Rev No. Date: Page 13 of 18

SERVICE BULLETIN

 Wiring Diagram - Config 1 Aircraft - Pre Service Bulletin

Figure 2
produced without the prior written consent of Pilatus Aircraft Ltd. © Pilatus Aircraft Ltd. All rights are reserved. No part of this document may be copied or re

G weder ganz noch teilweise kopiert oder reproduziert werden. © Pilatus Flugzeugwerke AG. Alle Rechte vorbehalten. Dieses Dokument darf ohne vorherige Zustimmung der Pilatus Flugzeugwerke A 	


 	
  
	

    







	




	





 

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Service Bulletin No: 34-038 Date: Mar 26/13

Rev No. Date: Page 14 of 18

SERVICE BULLETIN

 Wiring Diagram - Config 1 Aircraft - Post Service Bulletin

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Service Bulletin No: 34-038 Date:Mar 26/13

Rev No. Date: Page 15 of 18

SERVICE BULLETIN

 Wiring Diagram - Config 2 Aircraft - Pre Service Bulletin

Figure 4
Service Bulletin No: 34-038 Date: Mar 26/13

Rev No. Date: Page 16 of 18

SERVICE BULLETIN

 Wiring Diagram - Config 2 Aircraft - Post Service Bulletin

Figure 5

produced without the prior written consent of Pilatus Aircraft Ltd. © Pilatus Aircraft Ltd. All rights are reserved. No part of this document may be copied or re

G weder ganz noch teilweise kopiert oder reproduziert werden. © Pilatus Flugzeugwerke AG. Alle Rechte vorbehalten. Dieses Dokument darf ohne vorherige Zustimmung der Pilatus Flugzeugwerke A



	

 


	






 
 



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Line 

End 1 

Wire No. 

End 2 

Remarks 

Ident. No. Terminal No. Terminal P/N. Terminal P/N. Terminal No. Ident. No. 

For Config. 1 Aircraft

1 M127P E - F6A20N - 4 GB109 Disconnect End 2 and remove the terminal pin 2 TB109-01 X - F4H22N - 1 GB109 Remove completely 3 M127P E - F6A20N 971.31.18.830 - GS125 Connect End 24 TB109-01 X 971.42.31.535 F4H22N 971.31.18.830 - GS125 Install new

For Config. 2 Aircraft

5 M127P 3 - F81A22N - 4 GB109 Disconnect End 2 and remove the terminal pin 6 M127P 3 - F81A22N 971.31.18.830 - GS125 Connect End 2

Service Bulletin No: 34-038 Date:Mar 26/13

Rev No. Date: Page 17 of 18

SERVICE BULLETIN

 Hook-Up Chart (Config 1 and 2 Aircraft)

Figure 6
Service Bulletin No: 34-038 Date: Mar 26/13

Rev No. Date: Page 18 of 18

SERVICE BULLETIN

INTENTIONALLY BLANK
Please forwoard this form to:

PILATUS AIRCRAFT LTD,

CUSTOMER SUPPORT PC-12 (GC)

CH 6371 Stans, Switzerland

Fax: +41 41 619 73 11

Email: supportpc12@pilatus-aircraft.com

Important Note: If a parts replacement are involved, please provide the 

applicable work card including the component details (part number(s) and 

serial number(s)) together with the feedback sheet.

The purpose of this Feedback Form is to allow you, the customer, to comment on this Service Bulletin. Your comments will be used to 

further improve our Service Bulletin program. It also provides Pilatus Aircraft with current information on each individual aircraft.

 We have embodied/accomplished this SB  Fully

 FEEDBACK SHEET FOR ACCOMPLISHMENT OF 

SB No: _____________ Ref No: ____________

Aircraft Registration

Owner

Service Center

Aircraft MSN Total Airframe Hours

Total Landings

Comments (procedure, kit quality, suggested improvments etc.)

Date of accomplishment Name Signature

The undersigned confirms the accomplishment of this Service Bulletin

 We will not embody/accomplish this SB  Partially

Operator