# 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.

# SB 25-1111432



# SERVICE BULLETIN

SB 25-1111432
PAGE 2 OF 7 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

# SB 25-1111432



# SERVICE BULLETIN

SB 25-1111432
PAGE 3 OF 7 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 1/8 t h

inch and no more than 1/2 inch away from central hub.

ACCEPTABLE HANDLE : LESS than .125 INCH

SUSPECT HANDLE : GREATER than .130 INCH

# SB 25-1111432



# SERVICE BULLETIN

SB 25-1111432
PAGE 4 OF 7 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

# SB 25-1111432



# SERVICE BULLETIN

SB 25-1111432
PAGE 5 OF 7 May 22, 2007 Standard Contacts

Pacific Scientific Aviation Services 11700 N.W. 102 nd 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 ORDE RING PROCEDURES In order to maintain unit traceability, pleas e return all suspect parts (buckle only) to your local Pacific Scientific fac ility 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 quantitie s 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



# SERVICE BULLETIN

SB 25-1111432
PAGE 6 OF 7 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 restra int 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 bulleti n 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 Scientif ic 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 remov ed from service if the handle shows visible cracks. Handles which do not show visi ble cracks should be replaced as soon as possible. Replacement parts will be made av ailable at no charge for a period of six months. Thereafter, norma l 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 esti mates a turn around time of four days.

Q7: How much will the rework cost? A: All exchange/replacements will be Free of C harge 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, Germ any repair center per the SB instructions.

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

A: The buckle assembly should be i mmediately 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 bu ckle 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

# SB 25-1111432



# SERVICE BULLETIN

SB 25-1111432
PAGE 7 OF 7 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