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GOODRICH

SERVICE BULLETIN

Number 8023219(}-24·01

Goodrich Power Systems

Westfield Road

Pitslone LU7 9GT England

0044 1296 663000

SERVICE BULLETIN

STANDARD

ELECTRICAL POWER - GCU A PT. NO. 80232190 AND 80231894/S2INSPECTION/CHECK

OF THE TRANSIENT SUPPRESSION DIODES INSTALLED

INITIAL ISSUE

OF

SERVICE BULLETIN

80232192-24-01

AIRCRAFT APPLICABILITY DASSAUL T FALCON 7X

1. Instructions

A. The Service Bulletin was written under EASA Approval No. UK.145.00858.

8. The technical content of this document is approved under the authority of DOA No. EASA.21J.051.

Copyright in this SeMce Bulletin and associ<:!teddocuments and drawings belongs to Goodrich Power Systems and aJllights are raserve<l.

No reproduction of all or part of this Service Bulletin shall be made without the prior written consenl of Goodrich Power Systems.

This docUment contains infoonalion that may be confidential and its disclosure to others requires the written consent of Goodrich Power

Systems_
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GOODRICH

SERVICE BULLETIN

Number 80232190-24-01

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GOODRICH

SERVICE BULLETIN

Number 80232190-24-01

1. Planning Information

A. Effectivily

(1) This Service Bulletin (S8) applies to the Goodrich Corporation GCU Cards PI. No. 80232192 and

80231894/$2 installed in the left and Right Primary Power Distribution Box (PPOS), installed on

the Falcon 7X aircraft.

8. Concurrent Requirements

(1) None.

C. Reason

(1) Oassault Aviation has performed an analysis of aircraft-level effects associated with degradation of

33 Volt Transienl Voltage Suppression (TVS) Diode in the Primary Distribution Control Unit (PDCU)

and Generator Control Unit (GCU) printed circuit board assemblies.

D. Description

(1) The TVS Diodes have been categorised based on the severity of the effect. This S8 gives the

procedures necessary to identify the degradation of ~Priority 1 and 2" lVS Diodes.

E. Compliance recommendation

(1) At the next removal of a GCU card.

F. Approval

(1) The lechnical content of this document is approved under the authority of DOA No. EASA.21J.051.

G. Manpower

(1) 0.25 Man hours

H. Weight and Balance

(1) None.

I. Electrical Load Data

(1) None.

J. Software Accomplishment Summary

(1) Not applicable

K. References

(1) This S8 was written using Goodrich Engineering Report PG0900400ED and rework drg 80232216

as source data.

L. Other Publications Affected

Goodrich ACMM for the GCU CARD ASSEMBLY Part No. 80232192, ATA No. 24-61-52 will

be revised to include the data contained in this S8.

Goodrich CMM for the Left PPDB, Part No. SW02101, ATA No. 24--61~01 will be revised to

reference the data contained in this SB

Goodrich CMM for the Right PPDB, Part No. SW02201, ATA No. 24-61-02 will be revised to

reference the data contained in this SB

M. Interchangeability or Intermixability of Parts

(1) Not applicable

Initial Issue : Aug 13/09

ReVision Date : Aug 13/09

©: Goodricll Power Systems. 2009 All rights rese •..••ed.

80232190-24-01

Page 1 of 9
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GOODRICH

SERVICE BULLETIN

Number 80232190-24-{)1

2. Material lnfonnaoon

A. Material - Price and Availability

(1) Not Applicable.

B. Industry Support Program

(1) Not Applicable.

c. Material Necessary for each Component/Engine

(1) Not Applicable.

D. Spare Parts Availability

(1) Not Applicable.

E. Re-identlfied Parts

(1) None.

F. Tooling - Price and Availability

(1) The tools given below are necessary for this 58 and are to be procured from the sources given.

Prices and lead times for Goodrich lools are available on request.

Qty Part Number Source Keyword

1 · Commercially Available ESD Surface mat and

wrist band

1 TE2-Q658 Goodrich Power Falcon multi-channel

Systems transorb tester (33V)

1 · Commercially Available Power supply 48V D.C.

2 · Locally Made Ground lead with 4mm

plug terminations

2 · Commercially Available Crocodile clip

3. Accomplishment Instructions

A. General

CAUTION: THE SPDS CONTAINS ITEMS THAT ARE ELECTROSTATIC-DISCHARGE SENSITIVE

(ESDS). OBEY APPROVED INDUSTRY PRECAUTIONS WHEN YOU TOUCH, REMOVE

OR INSTALL PARTS. DAMAGE CAN OCCUR FROM ELECTROSTATIC DISCHARGE.

NOTE: This S8 is intended for use on a GCU that is removed from the PPD8 and off the aircraft.

(1) Place the GCU card on the ESD mat.

(2) Connect a ground lead to the ground socket of the test-set and a suitable earth point.

(3) Connect the DC plug from the Power Supply Unit (PSU) to the 48 volts socket on the side of the

test-set.

(4) Connect mains lead from the PSU to an applicable a.c. outlet and apply mains power.

Initial Issue : Aug 13/09

Revision Date : Aug 13/09

@, Goodrich Power System. - 2009 All ,J;jhlS reserved.

80232190-24-01

Page 2 of 9
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GOODRICH

SERVICE BULLETIN

Number 80232190-24-01

(5) Push the "TEST" button on the test-set, make sure the 40 RED LEOs illuminate.

NOTE: If, the RED LEOs do not illuminate the test set is damaged.

B. Procedure

(1) Plug the' board into the GCU connector on the test-set (Ref. Fig. 1) .

NOTE: The top side of the board (the side with the main connector) must face you.

(2) Connect a ground lead to the socket "GROUND" on the test-set. Use a crocodile clip and connect

the ground lead to the thermal plane of the GCU card (Ref. Fig_ 2) .

(3) Record serial number of the GCU card and the test-set on the Results sheet.

(4) Push the "TEST" button on the test-set, record the status of ailihe LEOs on the Result Sheet

Appendix 1.

NbTE: This is to collect dala for possible future enhancements.

(5) Release the test button.

(6) Push the "TEST' button on the test-set, and make sure the circuit LEOs listed (Ref. Table 1) are all

GREEN.

Table 1 LED Pass GCU

Circuit No. Function RED LED GREEN LED Result

9 GLC3 AUX OFF ON PASS

39 GENGC OFF ON PASS

(7) Release the test button.

(8) If, a RED LED is ON or a GREEN LED is OFF (Ref. Table 1). the GCU card must be returned to

Goodrich Power systems.

C. Completion

(1) Disconnect and remove the ground lead and crocodile clip from the thermal plane of the GCU card.

(2) Remove the GCU card from the test-set.

(3) Remove a.c. mains power and disconnect the PSU from the a.c. outlet..

(4) Disconnect the PSU from the 48 volts socket on the side of the lest-set.

(5) Remove the ground lead from the ground socket of the test-set and the earth point.

Initial Issue : Aug 13/09

Revision Dale : Aug 13f09

©: Goodrd, Power Systems - 2009 All r~hts reserved.

80232190-24-01

Page 3 of 9
(i9 GROUND

TEST

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GOODRICH

SERVICE BULLETIN

Number 80232190-24-01

GCU

PDCU B

PDCUA

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Figure 1

@: Go(}dnch Power Systems .. 2009 All rights resen;ed.

Iniliallssue

Revision Date

: Aug 13/09

: Aug 13/09

80232190·24-01

Page 4 of 9
o

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I

o

Initial Issue : Aug 13/09

Revision Date : Aug 13/09

©, Goodrich Power Systems· 2009 All rights reserved.

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GOODRICH

SERVICE BULLETIN

Number 80232190·24·01

ESD plane

Geu

Figure 2

80232190-24-01

Page 5 of 9
Initial tssue : Aug 13f09

Revision Date : Aug 13f09

©: Goodrich Power Systems· 2009 All rig~ts reselVed.

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GOODRICH

SERVICE BULLETIN

Number 80232190-24-01

INTENTIONALLY BLANK

80232190-24-01

Page 6 of 9
Appendix 1

A. Complete the Results Table.

NOTE: .•.Delete as necessary.

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GOODRICH

SERVICE BULLETIN

Number 80232190·24-01

Table 2 Results Table

I Board type ISerial No.

Circuit No. Function RED LED GREEN LED

1 PDCU A: BUS_TiE_MAN ON'" / OFF'" ON'" J OFF*

PDCU B: GlC4_B_ST

2 PDCU A: BTC1_A_ST OW I OFF'" ON* I OFF"

PDCU B: GLC3_B_ST

GCU: STAR

3 PDCU A: GLC3_A_ST OW I OFF" OW! OFF'

POCU B: GALLEY_NOT_SHED

GGU: TRIP

4 PDCU A: GLC2_A_ST OW I OFF* ON" I OFF*

PDCU B: BTC1 _8_8T

GCU: READY2LQADA

5 PDCU A: GlC1_A_ST OW f OFF" ON' I OFF*

PDCU B: CABIN_NOT_SHED

GCU: READY2l0ADB

6 PDCU A: BC1_A_ST OW I OFF" ON* I OFF*

PDCU B: 5G_DC

GCU: SPARE

7 PDCU A: EXT_PWR_ON OW j OFF* ON" f OFF*

PDCU B: GEN1 OC

GCU: SG_RDY2LD

8 PDCU A: APUC1_A_ST ON* /OFF* OW I OFF*

PDCU B: GALLEY_OFF

GCU: FAN_OFF

9 PDCU A: 3TARTMODE_A_ST ON' / OFF' ON" I OFF'

PDCU B: BC1 _8_3T

GCU: GLC _AUX

10 POCU A: GlC4 _A _3T OW I OFF' OW I OFF'

PDCU B: GEN2_0C

GCU: GCS_ON

Initial Issue : Aug 13/09

Revision Dale : Aug 13/09

©: Goodrich Power Systems· 2Qll9 All rigt>ts reserved.

80232190-24-01

Page 7 of 9
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GOODRICH

SERVICE BULLETIN

Number 80232190-24-01

Circuit No. function RED LED GREEN lED

11 PDCU B: GPC2_B_ST ON- IOFF" OW I OFF"

12 POCU B: BTe2_B_5T ON' IOFF" OW {OFF"

13 PDCU A: SPARE_OGO OW JOFF' OW / OFF"

PDCU B: GEN3 ~OC

14 PDCU A: BTC2_A_ST OW I OFF" OW I OFF"

PDGU 8: ISOL_TIED

15 PDCU A: WOW_A_L ON" J OFF" OW I OFF"

PDCU B: APUC1 _8_ST

16 PDCU A: WOW_A_R ON" / OFF" OW I OFF"

PDCU B: BTC3_B_5T

17 PDCU A: STBY_PUMP _ON ON" { OFF" OW f OFF"

PDCU B: WOW_B_L

18 PDCU A: BTC3_A_ST ON" IOFF' ON' f OFF'

PDCU B: CABIN_OFF

19 PDCU A: HSCB_SBEP _ON ON" I OFF" OW JOFF"

PDCU 8: GLC2_B_ST

20 PDCU A: GPC1_A_ST ON" I OFF' ON" , OFF"

PDCU B: BAT1_GP _DC_IN

21 PDCU B: SPARE_OG1 ON" I OFF" ON" I OFF'

22 PDCU B: Be2_B_ST ON' {OFF' ON" I OFF'

23 PDCU B: SPARE_CONT_eTl ON" I OFF' ON" I OFF'

24 PDCU B: GPC1_B_ST ON" {OFF" OW JOFF"

25 PDCU B: 5TARTMODE_B_ST ON~ { OFF' OW j OFF"

26 PDCU B: GLC1 _B_5T ON" 1 OFF' ON~ 1 OFF'

27 PDCU B: B_GPU_WOW ON' I OFF" OW 1 OFF~

28 POCU B: GEN4_0C OW IOFF' OW J OFF'

29 POCU B: EMERGJ50L_B_ST ON' I OFF" OW I OFF·

30 POCU B: WOW_B_R ON" I OFF' OW I OFF'

35 POCU B: RAT_WOW ON' I OFF" ON" IOFF'

36 POCU A: BATT_HEATER ON' IOFF' ON' I OFF'

37 GCU: STARTMODE ON" I OFF' ON" I OFF'

38 GCU: GENOFF ON' IOFF* ON" J OFF'

Initial Issue : Aug 13/09

Revision Date : Aug 13/09

@',Goodrich Power Systems _ 200!l All rights reserved.

80232190-24-01

Page 8 of 9
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GOODRICH

SERVICE BULLETIN

Number 80232190-24-01

Circuit No. Function RED LED GREEN LED

39 POCU B: BAn _GP _OC_OUT ON' / OFF~ ON" { OFF"

GCU: GENoe

Initial Issue : Aug 13f09

Revision Date : Aug 13f09

©: GondIic/l Power Systems - 2009 All righlS resOT\leO.

80232190-24"()1

Page 9 of 9