# ZODIAC AEROSPACE SERVICES EUROPE TECHNICAL PUBLICATION DEPARTMENT 61, RUE PIERRE CURIE – CS20001 78373 PLAISIR CEDEX - FRANCE Phone: +33 (0)1 61 34 19 24 - Fax: +33 (0)1 61 34 21 13

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No: 1 Page: 1/2 

### TRANSMITTAL SHEET This Transmittal Sheet applies to the issue 1, dated MAR 24/14, of Service Bulletin 766983-28-002. REASON FOR REVISION Paragraph 1. A. (2) & Appendix I : P/N 768-055, 768-100, 798-038 instead of 768-055-0, 768-100-0, 798-038-0. REVISION SEQUENCE Original Issue: OCT 15/13. Issue 1: MAR 24/14.

# ZODIAC AEROSPACE SERVICES EUROPE

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Page: 2/2 

### PAGE LEFT BLANK INTENTIONALLY

# ZODIAC AEROTECHNICS SENSING SYSTEMS 

# SERVICE BULLETIN

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 1 / 20 TITLE: FUEL – FUEL PROB E – INSPECTION FOR POTE NTIAL SPLICE CONDUCTOR SOLDERING DEFECT
1. PLANNING INFORMATION A. Effectivity (1) Aircraft application This Service Bulletin applies to ATR 42/72 aircraft. (2) Equipment involved This Service Bulletin applies to Fuel Probes 766-046-2, 766-047-2, 766-048-2, 766-793-1, 766-795-2, 766-796-2, 766-797-2, 766-983-1, 768-055, 768-100, 798-038 listed in Appendix I, produced from June 2011 to August 2013 and not identified with letter “C” in the control box of the identification plate. B. Concurrent Requirements Affected customers should notify their usual Zodiac Aerospace Services contacts in regards of their location (See table 4. ZODIAC AEROSPACE SERVICES FACILITIES). C. Reason The purpose of this inspection is to check and repair if necessary the connection with splice conductor on the fuel probe. D. Description This inspection consists to check and repair if necessary the splice conductor connection on fuel probes. A discrepancy was found on the ground wire, due to a non-compliant soldering on the splice conductor. Letter “C” is applied on equipment once inspected (see paragraph 3. B. Identification). E. Compliance This inspection is RECOMMENDED.

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 2 / 20 F. Approval The technical content of this document (rev.0) is approved under the Authority of DOA N°EASA. 21. J. 044. G. Manpower This Service Bulletin will be accomplished by Zodiac aircraft Sensing Systems Management (ZSSM) workshop within 15 working days from receipt of units. (1) 1 technician. (2) Check only: 1h00. (3) Complete operation: 1h45. H. Weight and Balance Not Changed. I. Electrical Load Data Not Changed. J. Software Accomplishment Summary Not Applicable. K. References CMM 28-42-72. L. Other Publications Affected Not changed. M. Interchangeability Not applicable.

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 3 / 20 2. MATERIAL INFORMATION A. Material – Price and Availability Application of this Service Bulletin is Free of Charge for equipment produced from June 2011 to August 2013, listed in Appendix I and not identified with letter “C” in the control box of the identification plate. B. Industry Support Information (1) The Service Bulletin can be accomplished by ZSSM workshop, the inspection will be done within 15 working days from receipt of equipment. C. Material Necessary for Each Component Not Applicable. D. Re-identified Parts Not applicable. E. Tooling – Price and Availability Not Applicable. 3. ACCOMPLISHMENT INSTRUCTIONS A. Procedure CAUTION: Step n°(1) of this procedure is optional and leads to a time-saving in case of compliant splice conductor. If step n°(1) cannot be accomplished, do step n°(3). (1) Do an X-ray inspection of the splice conductor installed in the support assembly of the fuel probe. Then do step n° (2).

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 4 / 20 (2) Do a check of the splice conductor soldering according to the following tables (in case of doubt, refer to step n°(3)): (a) If the splice conductor is compliant as described in table below, do step n°(7) for the final testing instructions. COMPLIANT SPLICE CONDUCTOR KEYPOINTS FIGURES

Melted soldering aligned on stripped surface

(b) If the splice conductor is not compliant as described in table below, do step n°(3) for the disassembly instructions.

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 5 / 20 NON-COMPLIANT SPLICE CONDUCTOR KEYPOINTS FIGURES Level 1 defect: Soldering not aligned on the stripped surface

Level 1 defect: Soldering is not melted

Level 1 defect: Missing soldering

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 6 / 20 NON-COMPLIANT SPLICE CONDUCTOR KEYPOINTS FIGURES Level 2 defect: Partially melted soldering

(3) Disassemble the fuel probe according to the following steps and tables: TOOLS CONSUMABLES Hot air tool with digital display (STEINEL HG 2310 or equivalent), with reduction nozzle (STEINEL n°070618 or equivalent) Beveled branchwood stick Ø4mm.
Flat-blade screwdriver 3.5x100 or equivalent --- (a) Soften glue with hot air tool to get access to the screws of the clamp. KEYPOINTS FIGURE
T°C=300°C Airflow = mini

# ZO D SENSING S

Date: M A Revisio n 

# D IAC A E

SYSTEMS

A R 24/14 n No. 1 (b)

(c) (d) 

# E ROTE C

S Strip glu e K

Risk of s clamp

Loosen t h Use the h clamp. K

Risk of s clamp 

# C HNICS

S ERVICE B e with bran c K EYPOINT

s cratching o

h e f our scr e h ot air tool a K EYPOINT

s cratching o



### B ULLETI N c hwood stic

o n the

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### N : k.

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# 766 9 FI G

r emove the t o remove t FIG



# 9 83- 2 G URE

clamp. t he remaini G URE



# 2 8-0 0 Pa g e: n g glue on



# 0 2

7

/ 20 the

# Z S E

D a R e 

# Z ODIA C

E NSING SYSTEM S

a te: MAR 24 / e vision No. 1 (4) 

# C AERO T S

/ 14 1 Do a visu

steps and

Binocul a magnifyi

Binocul a magnifyi equivale
(a) If th ste p

- T (ri n co n dis sol be t th e
- T gr o (B )

(b) If th n°( 5 

# T ECHN I

SERV I al inspecti o tables: TOOLS a r microsco p

ng lamp or
KEYPOIN T

a r microsco p

ng lamp or nt

e splice co p n°(6) for t h
KEYPOI T he solde n g) is fully m n tour cernable, der is t ween the s e ground wi r T he shield o und wire a )
.

e splice c o 5 ) for the re w 

# I CS

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p e or equivalent
T

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o nductor is w iring instr u NOT C O 

### L ETIN: p lice condu

l dering is c y instructio n M PLIANT S P

not compli a u ctions. O MPLIAN T 

# 7 6 cto r solder i CON S

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# 6 698 3

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N/A
FIGURE

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# - 002 P a g e: 8 / 20 f ollowing

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do step

# ZO D SENSING S

Date: M A Revisio n 

# D IAC A E

SYSTEMS

A R 24/14 n No. 1

(5) Do a T O Ho 23 1 (S T So Th e Cu



# E ROTE C

S K

In cas e to

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# C HNICS

S ERVICE B

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ccording t o
t h digital di s a lent), with 0 74616 or e

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### B ULLETI N r efer

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# 2 8-0 0 Pa g e: LES d
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# 0 2 9 /

20

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 10 / 20 (a) Desolder the core of the coaxial cable (HI) from the connector and the ground wire (M) from the lug. KEYPOINT FIGURE

Remove the red caps from the connectors.

(b) Remove the coaxial cable from the support assembly. (c) Cut the coaxial cable very close to the splice conductor and discard the excess. KEYPOINT FIGURE

Cutting very close to the splice conductor.

(d) Remove the remaining solder from the lug of the ground wire and from the connector receptacle. (e) Strip off 25mm of the first insulation of the coaxial cable. 

#  HI

M

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 11 / 20 KEYPOINT FIGURE
Stripping = 25mm

(f) Retract the braid to the maximum. FIGURE

(g) Cut the braid. KEY POINT FIGURE
Do not damage the second insulation.

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 12 / 20 (h) Strip off 5mm of the first insulation again. KEYPOINT FIGURE
Stripping = 5mm
(i) Strip and tin the new ground wire W104476. KEYPOINTS FIGURE - Length = 50mm - Stripping = 5mm (j) Hold the ground wire on the coaxial cable and solder it very lightly. KEYPOINTS FIGURE - Insulations of the two cables are aligned. - The least possible soldering (k) Install the splice conductor on the stripped portion of the wire: KEYPOINTS FIGURE - Solder ring centered. - The two cables inserted in the largest splice conductor diameter. 

## Ø large

# ZO D SENSING S

Date: M A Revisio n 

# D IAC A E

SYSTEMS

A R 24/14 n No. 1 (l)

(m)

(n) 

# E ROTE C

S Prepare t K

- A ngle d n°07461 - T°C=3 8
- A irflo w - Prehe a Solder th e

- Splice with the - Ring c e surface s - Durati o - Hot air oriented Make su r table bel o K
- The s o melted, discern a is visibl e shielder (A). - The s h ground w 

# C HNICS

S ERVICE B t he hot air t o K EYPOINT S d nozzle ST

6 or equiv a 8 0°. =mini. a ting >1min
e splice co n

KEYPOIN T conductor i top of the n e ntered in t s . o n : minimu

tool horizo

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its contour a ble, a fillet e between t h

and the gr o ielder and t w ire are ali g



### B ULLETI N o ol: S EINEL a lent.

.
n ducto r : T S n contact n ozzle. he stripped m of 18 s.ntallys plice cond u T S

m is fully is no of solder he o und wire t he g ned (B).



### N : u ctor solde



# 766 9 FI G

F

r ing is com p FI G



# 9 83- 2 G URE

F IGURE

pliant as d e G URE



# 2 8-0 0 Pa g e: 1 e scribed in



# 0 2

3 /

20 the

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 14 / 20 (o) Cut to length, strip and tin the ground wire (M) and the high impedance coaxial cable core (HI). KEYPOINT FIGURE
Stripping: 5mm.
(p) Solder the ground wire (M) on the lug of the support assembly. FIGURE



### M HI

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 15 / 20 (q) Solder the cable of high impedance (HI) on the connector receptacle. FIGURE

(r) Make sure that the solderings are compliant. (s) Blow compressed air on the fuel probe. Make sure that there is no solder splatter into the clamp.

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 16 / 20 (6) Assemble the fuel probe according to the following steps and tables. TOOLS CONSUMABLES QTY Flat-blade screwdriver 3.5x100 or equivalent Screw 

### G225032 4 Point 7M14339-7M14340 or equivalent Lock washer 

### G772120 4 --- Araldite 2011 (base 2011/A=W192355 + hardener 2011/B=W195356) 1 --- Clamp A791278 (if non-reusable) 1

--- Cap 

### G899087D7 2 --- 95° Denaturized Ethylic Alcohol 1 --- Cotton-swab 1 (a) Tighten the 4 screws with the 4 lock washers on the clamp A791278. KEYPOINTS FIGURES

- Do not reuse the initial screws. - Change the clamp if it is scratched.

(b) Use a cotton-swab moistened with 95° Denaturized Ethylic Alcohol to remove the grease from the clamp. (c) Prepare a base-hardener mixture of Araldite. KEYPOINTS FIGURE

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 17 / 20 - Proportion by weight:

Base 2011/A: 100 p.p. Hardener 25011/B: 80p.p. - Use of the mixture: 2h max.

(d) Apply Araldite on the screw heads. (e) Remove any excess with a lint-free cloth. (f) Let polymerising at ambient temperature during a minimum of 8 hours. (7) Final testing Do the final testing of the fuel probe in accordance with "TESTING AND FAULT ISOLATION" chapter of CMM 28-42-72.

# Z S E

D a R e 

# Z ODIA C

E NSING SYSTEM S

a te: MAR 24 / e vision No. 1 B. Iden t (1)

(2) 

# C AERO T S

/ 14 1 t ification

After insp e plate acc o T O Punch w M K E Light mal Letter “C ” left side o stamp.

Install the 

# T ECHN I

SERV I e ction, app o rding to th e O OLS w ith letter “ C M allet E YPOINTS

let blows

” on the rig h o f the contr o

protection 

# I CS

I CE BUL L ly letter “C ” e following t QTY C ” 1 1

h t or o l

caps on th e



### L ETIN:

” on the “C o t ables:

CONSU M Cap G89 9

-- -

e 2 connec t



# 7 6 o ntrol” box M ABLES

9 087D7

- FI G

t ors.



# 6 698 3 of the fuel QTY

2

--- G URES



# 3 -28 - P a probe iden



# 002 ag e: 18 / 20 tification

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 19 / 20 4. ZODIAC AEROSPACE SER VICES FACILITIES EUROPE ASIA ZODIAC AEROSPACE SERVICES EUROPE 61 rue Pierre Curie CS20001 78373 PLAISIR Cedex France Phone : +33 61 34 23 23 FA X : + 33 1 61 34 21 13 ZODIAC AEROSPACE SERVICES ASIA 36, Loyang Drive SINGAPORE 508949 Phone : +65 6579 2230 Fax : +65 6579 2231

AMERICAS ZODIAC AEROSPACE SERVICES AMERICAS W175 N5737 Technology Drive MENOMONEE FALLS, WI 53051 USA Phone : +1 262 293 1000 FAX : +1 262 293 1010 Web site: www.zodiacaerospace.com

# ZODIAC AEROTECHNICS SENSING SYSTEMS

Date: MAR 24/14 

### SERVICE BULLETIN: 

# 766983-28-002 Revision No. 1 Pa g e: 20 / 20 APPENDIX I This Service Bulletin applies to fuel probes produced from June 2011 to August 2013, not identified with letter “C” in the control box of the identification plate, and listed as follows: Aircraft Equipment PNR First S/Ns Last S/Ns 42 766-046-2 1046 1083 42 766-047-2 1154 1214 42 766-048-2 1150 1197 42 768-055 1156 1227 42 798-038 1150 1238 72 766-793-1 1469 1826 72 766-795-2 1661 2093 72 766-796-2 1722 2152 72 766-797-2 1663 2051 72 766-983-1 2200 2652 72 768-100 1511 1876