ISSUE : 5 of 19/03/2004 SB N° : 90-25-012 

 DATE : 18/01/2001 PAGE : 1 / 10 

SB – Form CE 025 – 10/93 

58(/8&,(1&283(7%3,6628'81)5$1&(7(/(3+21(7(/()$;

	


SERVICE BULLETIN 

N° 90-25-012 

ATA system: 25 

SUBJECT: 

PASSENGER SEAT ASSEMBLIES 

BACKREST LINKS 

ROUTINE INSPECTION 

 

Q. GOVINDAPOULLE F. PORTALIER G. OKON 

 Technical Support Eng. Customer Services Airworthiness Mgr. 

Service Bulletin approved by SICMA AERO SEAT in accordance with IR 21A603(b) & IR 21A611(a) 
	


SERVICE BULLETIN 

ISSUE : 5 of 19/03/2004 SB N° : 90-25-012 

 DATE : 18/01/2001 PAGE : 2 / 10 

SB – Form CE 025 – 10/93 

58(/8&,(1&283(7%3,6628'81)5$1&(7(/(3+21(7(/()$;

1/ PLANNING INFORMATION 

A - EFFECTIVITY

 

 This Service Bulletin is applicable to SICMA seat series 9140, 9166, 9173, 9174, 9184, 9188, 

9196, 91B7, 91B8, 91C0, 91C2, 91C3, 91C4, 91C5, 9301, 9501, equipped with backrest links P/N 

90-000200-104-1 and 90-000200-104-2. See the affected seat P/Ns list on attached ANNEX 1 

issue 2 of this SB90-25-012 and its revisions. 

 

B - REASON 

 After some time in-service some cracks have been found on backrest links P/N 90-000200-104-1 & 

90-000200-104-2 and will adversely affect the structural resistance of the backrest structure. 

 To prevent this situation from occurring SICMA has issued a checking and replacement procedure 

as a routine maintenance. 

C - DESCRIPTION 

 The instructions of this document contain the following steps : 

1. INTERMEDIATE INSPECTION : to ensure existing links are in good condition and not 

cracked. This check must be performed before 6000 seat operating hours since new or since 

last backrest links installation or before 2 years from seat manufacturing date, whichever 

occurs later.

 On seats which are already over 6000 operating hours or over 2 years from seat 

manufacturing date, a period of 900 extra seat operating hours without exceeding 5 

months is granted from the issuing date of the Airworthiness Directive ref. 2001-605 

(AB), whichever occurs later, to complete the backrest links inspection. 

2. ROUTINE REPLACEMENT : to change the existing links P/N 90-000200-104-1 and 90-

000200-104-2 with new ones. This replacement must be performed before 12000 seat 

operating hours since new or since last backrest links installation or before 4 years from seat 

manufacturing date, whichever occurs later. 

 On seats which are already over 12000 operating hours or over 4 years from seat 

manufacturing date, a period of 3500 extra seat operating hours without exceeding 18 

months is granted from the issuing date of the Airworthiness Directive ref. 2001-605 

(AB), whichever occurs later, to complete the backrest links replacement. 

 During this period of 3500 extra seat operating hours without exceeding 18 months 

from the issuing date of the Airworthiness Directive ref. 2001-605 (AB), the backrest 

links will have to be checked for proper conditions every 900 operating hours without 

exceeding 5 months from the issuing date of the Airworthiness Directive ref. 2001-605 

(AB), whichever occurs later. 

The application of this Service Bulletin SB90-25-012 involves the addition of the modification 

placard P/N 00-6414 on each modified backrest structure indicating that the SB90-25-012 and its 

revisions - Part 2 has been completed (see § IDENTIFICATION of this S/B). 
	


SERVICE BULLETIN 

ISSUE : 5 of 19/03/2004 SB N° : 90-25-012 

 DATE : 18/01/2001 PAGE : 3 / 10 

SB – Form CE 025 – 10/93 

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D - COMPLIANCE 

The application of this Service Bulletin is mandatory in accordance with the Airworthiness 

Directive (AD) ref. 2001-605 (AB). 

E - APPROVAL 

Service Bulletin approved by SICMA AERO SEAT in accordance with IR 21A603(b) & IR 

21A611(a) 

F - MANPOWER 

 

 Estimated time : 1 Min. per backrest inspection 

 Estimated time : 40 Min. per backrest links change 

G - MATERIAL – Cost and availability 

The necessary parts will be supplied by : 

SICMA AERO SEAT 

 Spare parts department 

 7, Rue Lucien Coupet 

 36100 ISSOUDUN – France 

 Tel.: 33 (0) 2 54 03 39 39 - Fax: 33 (0) 2 54 03 39 00 

 

 Availability : 30 days upon receipt of request. 

 Cost : See Chapter 3 « Material information ». 

H - TOOLING and MATERIAL – Cost and availability 

 No special tooling is required 

I - WEIGHT and BALANCE 

Not affected 

J - ELECTRICAL DATA 

 Not affected 

K - REFERENCES 

 N/A 

L - OTHER PUBLICATIONS AFFECTED 

Component Maintenance Manuals 
	


SERVICE BULLETIN 

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 DATE : 18/01/2001 PAGE : 4 / 10 

SB – Form CE 025 – 10/93 

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PART ONE : CHECKING PROCEDURE 

INTERMEDIATE INSPECTION : 

Required before 6000 seat operating hours since new or since last backrest links installation or before 

2 years from seat manufacturing date on the issuing date of the AD ref. 2001-605 (AB), whichever 

occurs later. 

For affected seats having more than 12000 seat operating hours or more than 4 years from seat 

manufacturing date on the issuing date of the AD ref. 2001-605 (AB), whichever occurs later : The intermediate inspection is required every 900 seat operating hours or every 5 months without 

exceeding 3500 seat operating hours or 18 months on the issuing date of the AD ref. 2001-605 (AB), 

whichever occurs later.

ACCOMPLISHMENT INSTRUCTIONS : 

1. On each backrest assy, pull up the low corner of the backrest cushion in order to gain access to the 

backrest links see figure 1. 

2. Perform a visual inspection on the backrest links in order to check if there is any crack and especially 

at the location shown on figure 2. A flash-light can be used. 

3. According to findings perform the following appropriate action (see figure 2) : 

FINDINGS ACTION 

The links are not cracked 

The links are serviceable and can be left in-service 

until the 12000 seat operating hours since new or since 

last backrest links installation or before 2 years from 

seat manufacturing date, whichever occurs later 

The link(s) has (have) crack stopped at the 

lock-out pin-hole 

(*) The links have a limited life span and will have to be 

replaced within 600 operating hours without exceeding 

3 months, whichever occurs later 

The link(s) has (have) crack which passed 

the lock-out pin-hole 

(*) The links are not serviceable and must be 

immediately replaced 

(*) refer to Removal Procedure in Part Two of this Service bulletin 

NOTE : In order to keep the same service life of the links assembly, both links P/N 90-000200-

104-1 and 90-000200-104-2 have to be replaced in same time. 

IDENTIFICATION (see figure 4 ) : 

1. Add or complete the placard P/N 00-6414 on each checked backrest to indicate that the Service 

Bulletin SB90-25-012 and its revisions – Part 1 has been completed. 
	


SERVICE BULLETIN 

ISSUE : 5 of 19/03/2004 SB N° : 90-25-012 

 DATE : 18/01/2001 PAGE : 5 / 10 

SB – Form CE 025 – 10/93 

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NOTE: The placard P/N 00-6414 should be installed onto the backrest structure sheet-aluminum (see 

figure 1). 

PART TWO : REPLACEMENT PROCEDURE 

ROUTINE REPLACEMENT : 

Required before 12000 operating hours since new or since last backrest links installation or before 4 

years from seat manufacturing date or in case of cracked link on the issuing date of the AD ref. 2001-

605 (AB), whichever occurs later. 

ACCOMPLISHMENT INSTRUCTIONS : 

1. On each backrest assy, pull up the low corner of the backrest cushion in order to gain access to the 

backrest links. 

2. Disconnect the hydrolock from the backrest link (item 1, figure 3) to allow the backrest to be folded 

forwards. Make sure to not damage the kick-panel with this link while pulling forwards the backrest. 

3. Remove the two backrest hinge bolts in order to reach easily the links attachment. 

4. Remove the bolt P/N AN410A, nut P/N NAS679A4, washers P/N 56-06-26-32 and friction washers 

P/N 502-20-500-02 (items 2, figure 3) from the hydrolock link. 

5. On some seats, a backrest breakover shaft or lock-out pip-pin has to be removed from the lock out 

pin hole on the links. 

6. Remove the backrest hinge spacer (item 3, figure 3) and the upper attachment bolt P/N AN3-7A and 

nut P/N NAS679A3 (item 4, figure 3) from the backrest structure. 

7. Disengage the two links P/N 90-000200-104-1 and 90-000200-104-2 and the spacer P/N 90-000200-

112-0 from the backrest structure. 

8. Install new links P/N 90-000200-104-1 and 90-000200-104-2 with the existing spacer P/N 90-

000200-112-0 into backrest structure by using the bolt P/N AN3-7A and nut P/N NAS679A3. 

9. Reverse the above steps 5 to 2 and restore the seat to normal condition. 

IDENTIFICATION (see figure 4) : 

1. Add or complete the placard P/N 00-6414 on each modified backrest to indicate that the Service 

Bulletin SB90-25-012 and its revisions – Part 2 has been completed. 

NOTE: The placard P/N 00-6414 should be installed onto the backrest structure sheet-aluminum (see 

figure 1) 
	


SERVICE BULLETIN 

ISSUE : 5 of 19/03/2004 SB N° : 90-25-012 

 DATE : 18/01/2001 PAGE : 6 / 10 

SB – Form CE 025 – 10/93 

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BACKREST STRUCTURE ASSEMBLY EQUIPPED WITH LINKS 

- FIGURE 1 - 

BOLT P/N AN3-7A LINKS LOCATION 

SPACER P/N 90-000200-112-0 

NUT P/N NAS679A3

MODIFICATION PLACARD 

P/N 00-6414 

LOCATION FOR STICKING 
	


SERVICE BULLETIN 

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 DATE : 18/01/2001 PAGE : 7 / 10 

SB – Form CE 025 – 10/93 

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BACKREST LINK INSPECTION 

 

- FIGURE 2 - 

Backrest link in 

good condition 

Backrest link with 

crack stopped at the 

hole 

Backrest link with 

crack which passed 

the hole 

SERVICEABLE PART 

CAN BE LEFT 

IN- SERVICE LIMITED LIFE SPAN 

LINK TO BE 

REPLACED WITHIN 600 

SEAT OPERATING 

HOURS WITHOUT 

EXCEEDING 3 MONTHS 

UNSERVICEABLE 

PART 

MUST BE REPLACED 

IMMEDIATELY 
	


SERVICE BULLETIN 

ISSUE : 5 of 19/03/2004 SB N° : 90-25-012 

 DATE : 18/01/2001 PAGE : 8 / 10 

SB – Form CE 025 – 10/93 

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LINKS REMOVAL PROCEDURE 

- FIGURE 3 - 

LINK BETWEEN 

BACKREST AND 

HYDROLOCK 

ATTACHMENT BOLT-NUT 

AND SPACER TO BE 

REMOVED

BACKREST HINGE SPACER 

TO BE REMOVED 

BOLT – WASHERS – 

FRICTION WASHERS – NUT 

TO BE REMOVED 

4 

3 

2 

1 
	


SERVICE BULLETIN 

ISSUE : 5 of 19/03/2004 SB N° : 90-25-012 

 DATE : 18/01/2001 PAGE : 9 / 10 

SB – Form CE 025 – 10/93 

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MODIFICATION PLACARD P/N 00-6414 

TO BE INSTALLED ONTO THE BACKREST STRUCTURE SHEET-ALUMINUM 

- FIGURE 4 - 
	


SERVICE BULLETIN 

ISSUE : 5 of 19/03/2004 SB N° : 90-25-012 

 DATE : 18/01/2001 PAGE : 10 / 10 

SB – Form CE 025 – 10/93 

58(/8&,(1&283(7%3,6628'81)5$1&(7(/(3+21(7(/()$;

3/ MATERIAL INFORMATION 

1. Parts required per the Part Two of this document (see affected seats listed on the ANNEX 1 issue 

2 of this SB90-25-012 and its revisions) : 

Part Number Description Qty Notes 

90-000200-104-1 Link 1 - 

90-000200-104-2 Link 1 - 

00-6414 Modification Placard 1 Figure 4 

The prices mentioned below are valid for 

the dispatch year of this document. Prices 

are revised each Jan. 1st. These will then be 

used to respond to a request for quotation. 

Qty Price 

SB90-25-012 KIT 

1 thru 9 

10 thru 24 

25 and up 

259,64 

194,73 

129,82 

2. Parts required per the Part One of this document (see affected seats listed on the ANNEX 1 issue 

2 of this SB90-25-012 and its revisions) : 

Part Number Description Qty Notes 

00-6414 Modification Placard 1 Figure 4 

The prices mentioned below are valid for 

the dispatch year of this document. Prices 

are revised each Jan. 1st. These will then be 

used to respond to a request for quotation. 

Qty Price 

00-6414 Modification placard 

1 thru 9 

10 thru 24 

25 and up 

7,94 

6,61 

5,29