SB 25-1111432 

SERVICE BULLETIN 

 SB 25-1111432 

PAGE 1 OF 7 

May 22, 2007 

TO: Owner/Operators of Pacific Scientific Company Restraint 

Systems using Buckle Assembly Part Numbers 1111430-XX 

and 1111475-XX. 

SUBJECT: Information regarding the potential failure of the Guarded 

Rotary Buckle plastic handle. 

PURPOSE: This Service Bulletin (SB) identifies suspect Buckle 

Assemblies and advises operators to return them to Pacific 

Scientific for exchange/replacement. 

1. INTRODUCTION

Pacific Scientific has recently received field reports of several instances of cracking on 

the guarded rotary buckle plastic handle. The buckle assemblies returned to and 

examined by Pacific Scientific had large, readily apparent cracks throughout the plastic 

buckle handle. Pacific Scientific is investigating the cause of these cracks. 

Preliminary testing performed by Pacific Scientific on buckle assemblies with cracked 

plastic handles indicates that in some circumstances when a load is placed on the 

restraint system, the straps may not release as intended when the buckle is rotated. 

Pacific Scientific therefore recommends the mandatory, immediate replacement of the 

affected buckle assemblies. 

 Figure 1 

Part Number 

1111430-XX or 1111475-XX. 
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SERVICE BULLETIN 

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May 22, 2007 

3. SCOPE

This SB only involves Buckle Assemblies 1111430-XX and 1111475-XX with a date of 

manufacture between November 2004 and May 2007. These buckle part numbers are 

integral to Restraint Systems assemblies listed in Appendix 1, (see pg 7) . 

This Service Bulletin does not affect other types of Pacific Scientific plastic buckle 

handles or metal handle rotary buckles. 

4. REFERENCE

ACMM 25-11-59 “Restraint Systems”. 

See; http://www.pacscimiami.com/2004RestraintInspectionData.pdf

5. COMPLIANCE

Mandatory for guarded rotary buckles which contain suspect handles. Replacement 

parts will be made available at no charge to owners and operators for a period of six 

months from the date is issue of this document. Thereafter, normal R&O charges will 

apply. 

6. SAFETY 

No special safety precautions in performing this SB. 

6. TOOLING

No special tools or fixtures are required. A simple shim to release the fixed position 

strap fitting from the buckle is required. (See Figure 3) 

7. MANPOWER

Inspection and replacement of buckle from system should take one person 

approximately 0.1 hour. A Video clip of the process is posted at www.pacscimiami.com

8. INSPECTION

Suspect handles may be identified by checking the PN on the reverse side of the buckle 

assembly against the part numbers listed in Appendix 1 of this service bulletin. 

Suspect handles may also be identified by measuring the thickness of the handle vane. 

Measurement to determine suspect handles will be accomplished in accordance with 

Figure 3. 

ACCEPTABLE PARTS will have a vane dimension LESS than .125 INCH 

SUSPECT PARTS will have a vane dimension GREATER than .130 INCH

A GOLD center logo plus oversize vanes are indicators of suspect parts. Handles that 

have been reworked are marked with a BLUE logo on the center button. (See figure 4). 

These handles are acceptable and do not require replacement. 

In case of question or doubt of the status of the restraint in question, please contact us 

via email at sb@pacscimiami.com or (626) 228 8841 
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May 22, 2007 

Figure 2 

ACCEPTABLE HANDLE SUSPECT HANDLE 

Figure 3 

Determination of Vane dimension 

Figure 4 

REWORKED HANDLE HAS 

BLUE LOGO BUTTON : ACCEPTABLE

Measure vane no closer than 1/8th

inch and no more than 1/2 inch 

away from central hub. 

ACCEPTABLE HANDLE: 

LESS than .125 INCH 

SUSPECT HANDLE: 

GREATER than .130 INCH 
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May 22, 2007 

9. PROCEDURES

All suspect buckle assemblies (buckle assembly only) shall be removed from service for 

return to Pacific Scientific for exchange/replacement. 

Remove suspect buckle from fixed lap belt by sliding a shim between the fixed belt fitting 

and back of buckle assembly; 

1) Insert a piece of thin metal stock into the slot of the rotary buckle and push inward 

between the fitting and the buckle locking mechanism (see Figure 5) 

2) Pull the strap from the buckle 

3) Remove the buckle pad as necessary. 

A Video clip of removal process is available at www.pacscimiami.com 

Figure 5 

To reassemble with acceptable buckle, insert lap belt into new buckle. Fixed strap 

location is indicated by appropriate marking on buckle housing. Additional detailed 

instructions are available in ACMM 25-11-59 should they be required. 

10. MATERIAL OR SERVICE

Special contact points have been established in order to manage this Service Bulletin. 

Contact one of the following for instructions, replacement parts and technical questions: 

sb@pacscimiami.com or 1 (626) 228-8841 
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SERVICE BULLETIN 

 SB 25-1111432 

PAGE 5 OF 7 

May 22, 2007 

Standard Contacts 

Pacific Scientific Aviation Services 

11700 N.W. 102nd Rd. # 6 

Miami, Florida 33178 

United States 

Ph: 305-477-4711 

Fax: 305-477-9799 

Contact: Edel Mena 

Pacific Scientific UK Ltd. 

Howarth Road, Maidenhead 

Berkshire SL6 1AP 

United Kingdom 

Ph: 44-1628 68-2200 

Fax: 44-1628-68 2250 

Contact: Ross Hamilton 

Pacific Scientific Germany 

Unit 6 Hagen Park 

Miramstrasse 74 

34123 Kassel 

Germany 

Tel: + 49 (0) 561 57981 0 

Fax: + 49 (0) 561 57981 25 

Contact: Holger Laue 

11. EQUIPMENT ORDERING PROCEDURES

In order to maintain unit traceability, please return all suspect parts (buckle only) 

to your local Pacific Scientific facility with your company’s no-charge repair 

purchase order. Units will be repaired or replaced in a timely manner and 

returned with FAA 8130-3 or EASA Part 145 Form 1 tags. 

Should you require replacement parts in advance of removal, please identify the 

specific buckle part numbers and quantities that you will require, and contact 

your local Pacific Scientific repair center for instructions 

Additional details and instructions are available at www.pacscimiami.com 
SB 25-1111432 

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May 22, 2007 

12. FAQ Frequently Asked Questions

Q1: Are any other Pacific Scientific restraint Affected by this SB? 

 A: No other types of restraints or restraint components are affected by this condition or SB. 

Q2: Do I remove my entire system and send it in? 

 A: No, follow instructions in this bulletin and remove the buckle only. The straps need not be 

returned. 

Q3: Can I remove the handle and do the repair myself? 

 A: No, repairs other than by Pacific Scientific are not authorized. Return to service tags 

must be issued by Pacific Scientific. 

Q4: How soon should I send in my buckle? 

 A: The buckle must be immediately removed from service if the handle shows visible 

cracks. Handles which do not show visible cracks should be replaced as soon as 

possible. Replacement parts will be made available at no charge for a period of six 

months. Thereafter, normal R&O charges will apply. 

Q5: Will I receive a new or repair buckle? 

 A: Repaired buckles will be sent to operators. 

Q6: How long does it take to fix the unit? 

 A: Pacific Scientific currently estimates a turn around time of four days. 

Q7: How much will the rework cost? 

 A: All exchange/replacements will be Free of Charge within 6 months from the date of this 

document. 

Q8: Where do I send my unit? 

 A: Issue your standard no charge repair order referencing this SB and forward to Pacific 

Scientific’s Miami, London, or Kassel, Germany repair center per the SB instructions. 

Q9: What should I do if my buckle handle is cracked? 

A: The buckle assembly should be immediately removed from service. 

Contact Pacific Scientific for exchange/replacement. 

 

Q10: What can happen if the buckle handle is cracked? 

 A: Under some circumstances, testing has shown that the straps might not release when 

the handle is rotated. There have been no reports of this happening in the field. Pacific 

Scientific is replacing the buckle handles as a precaution. 

 

Q11: Who should I contact with questions? 

 A: Contact any of the following; 

o 1 (626) 228 8841 

o SB@pacscimiami.com 

o Miami; Contact : Edel Mena 305-477-4711 

o UK; Contact: Ross Hamilton 44-1628 68-2200 

o Germany; Contact: Holger Laue 49 (0) 561 57981 0 

o www.pacscimiami.com www.pacscieurope.com 
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May 22, 2007 

APPENDIX 1

Restraint system part numbers potentially affected. 

1 0108084-05 30 1111432-01 59 2000014-83 

2 0108084-07 31 1111460-01 60 2000021-05-001 

3 0108092-01 32 1111460-03 61 2000029-01 

4 0108092-03 33 1111475-XX 62 2000029-03 

5 0108904-01 34 1117119-01 63 2000029-101 

6 0108904-03 35 1117119-03 64 2000029-121 

7 0108904-05 36 1117119-05 65 2000029-55 

8 0108904-301 37 1117119-07 66 2000029-71 

9 0108904-303 38 1117148-01 67 2000029-73 

10 0108904-53 39 1117148-03 68 2000037-05 

11 0108904-55 40 1117148-05 69 2000067-01 

12 0108904-91 41 1117148-07 70 2000091-05-001 

13 0108904-93 42 1117148-09 71 2000104-23-226 

14 0118013-01 43 1117148-11 72 2000104-43-226 

15 0118026-05 44 1117148-133 73 2000108-01-001 

16 0118030-07 45 1117148-15 74 2000108-03-001 

17 0118037-01-001 46 1117148-17 75 2000111-01 

18 0118037-03-001 47 1117148-27 76 2000111-03 

19 0118038-01 48 1117148-29 77 2000114-03-001 

20 1106193-03 49 1117148-33 78 2000115-101 

21 1106193-13 50 1117148-35 79 2100011-03 

22 1106193-53 51 1117181-01 80 2100023-15-001 

23 1109012-03-001 52 1117433-21 81 2100025-01-001 

24 1109026-01-001 53 1117433-23 82 2100025-01-066 

25 1109026-11-001 54 2000013-01-001 83 2100025-01-104 

26 1109026-31-001 55 2000013-03-001 84 2100025-01-243 

27 1111131-03 56 2000014-01 85 2100025-03-066 

28 1111147-01-001 57 2000014-03 86 2100025-03-104 

29 1111430-XX 58 2000014-81 87 2100025-03-243 

END