Sikorsky Aircraft Corporation
6900 Main Street P.O. Box 9729
Stratford, Connecticut 06615-9129
(203) 386-4000
S-70TM/H-60 HELICOPTER
ALERT
SERVICE BULLETIN
NOTICE TO ALL PERSONS RECEIVING THIS DOCUMENT:
WARNING: THIS DOCUMENT, OR AN EMBODIMENT OF IT IN ANY MEDIA, DISCLOSES INFORMATION WHICH IS PROPRIETARY, IS THE PROPERTY OF LOCKHEED MARTIN CORPORATION AND/OR ITS SUBSIDIARIES, IS
AN UNPUBLISHED WORK PROTECTED UNDER APPLICABLE COPYRIGHT LAWS, AND IS DELIVERED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED, DISCLOSED, REPRODUCED, IN WHOLE OR IN PART
(INCLUDING REPRODUCTION AS A DERIVATIVE WORK), OR USED FOR MANUFACTURE FOR ANYONE OTHER THAN LOCKHEED MARTIN CORPORATION AND/OR ITS SUBSIDIARIES WITHOUT ITS WRITTEN CONSENT,
AND THAT NO RIGHT IS GRANTED TO DISCLOSE OR SO USE ANY INFORMATION CONTAINED HEREIN. ALL RIGHTS RESERVED. ANY ACT IN VIOLATION OF APPLICABLE LAW MAY RESULT IN CIVIL AND CRIMINAL
PENALTIES.
S-70TM IS A REGISTERED TRADEMARK OF SIKORSKY AIRCRAFT CORPORATION.
ASB 70-02-046
Basic Issue ▪ June 30/22
SUBJECT:
AIRFRAME – Pilot and Copilots Seats – One-Time Inspection of Pilot and Copilot Seat
Restraint Harness.
Section 1. PLANNING INFORMATION
A.
Effectivity
All S-70/H-60 with Pilot/Copilot seat utilizing restraint harness P/N 10223-12,
102335-1, 102335-2, 102335-3, or 112409-101 and all spares.
B.
Purpose
To perform a one-time inspection of Pilot/Copilot seat restraint harness for
condition and complying retirement date.
C.
Background Seat supplier BAE issued a Notice of Potential Escape No. 2129 informing
Sikorsky Aircraft of a failed lap restraint at the anchor fitting during a 35 G forward
static test. It was determined that the failure was due to non-conforming wrap
radius of the seat restraint anchor P/N 930045. Further investigation noted restrain
anchor P/N 930010 was also out of compliance.
D.
Description
E.
Compliance Compliance is Essential. The inspection outlined herein shall be accomplished no
later than September 28, 2022.
ONE-TIME
INSPECTION
Aircraft is prepared for inspection. Pilot/Copilot restraint harness is inspected for
condition and complying retirement date in accordance with this Alert Service
Bulletin (ASB). Restraint harness is replaced as required. Log card tracking of
restraint is initiated if not already in place. Compliance is recorded and aircraft is
returned to service.
Page 1 of 11
WARNING – This document contains export-controlled information subject to the EAR. ECCN 9E610.a
S-70/H-60 ALERT
SERVICE BULLETIN
ASB 70-02-046
Basic Issue ▪ June 30/22
Section 1. PLANNING lNFORMATION (Continued)
F.
Approval
The technical details of this design are approved by an Armed Force of the United
States. FAA approval is subsequently derived from 14 CFR 21.25(a)(2).
G.
Manpower (Estimated)
Task
Complete Restraint Harness Inspection
No. of Men
No. of Hours
Man-Hours*
1
1.0
1.0
Total Man-Hours
1.0
*Estimate does not include time required to prepare helicopter or return it to flight status.
H.
Tooling
Not applicable.
I.
Weight and Balance
Not affected.
J.
Electrical Load Data
Not affected.
K.
Software Load Data
Not changed.
L.
References
(1)
M.
Applicable S-70/H-60 model helicopter maintenance manual.
Publications Affected
None.
N.
Attachment
None.
Page 2
ONE-TIME
INSPECTION
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S-70/H-60 ALERT
SERVICE BULLETIN
ASB 70-02-046
Basic Issue ▪ June 30/22
Section 2. MATERIAL INFORMATION
A.
Basis for Material Data
Per helicopter.
B.
Bill of Material
None.
C.
Consumable Material
OBSERVE ALL CAUTIONS AND WARNINGS ON CONTAINERS
WHEN USING CONSUMABLES. WHEN APPLICABLE, WEAR
NECESSARY PROTECTIVE GEAR DURING HANDLING AND USE. IF
A CONSUMABLE IS FLAMMABLE OR EXPLOSIVE, MAKE CERTAIN
CONSUMABLE AND ITS VAPORS ARE KEPT AWAY FROM HEAT,
SPARK AND FLAME. MAKE CERTAIN FIREFIGHTING EQUIPMENT
IS READILY AVAILABLE PRIOR TO USE. FOR ADDITIONAL
INFORMATION ON TOXICITY, FLASHPOINT AND FLAMMABILITY
OF CHEMICALS, CONSULT YOUR MEDICAL DEPARTMENT OR
THE MANUFACTURER OF THE CONSUMABLE.
Qty
Nomenclature
Part No.
(AR)
CLOTH, LINT FREE
MIL-C-85043 TY1
(1)
Source
(1)
Procured through normal supply channels.
Section 3. ACCOMPLISHMENT INSTRUCTIONS
A.
Prepare helicopter for modification:
TO PREVENT ELECTRICAL SHOCK OF PERSONNEL OR
POSSIBLE DAMAGE TO HELICOPTER COMPONENTS, MAKE
SURE TO TURN OFF ALL ELECTRICAL POWER.
B.
C.
(1)
Turn off all helicopter electrical and hydraulic power.
(2)
Engage rotor brake or gust lock.
Inspect Pilot/Copilot seat restraint harness for P/N 10223-12, 102335-1, 102335-2, 102335-3, or
112409-101:
(1)
If the Pilot/Copilot seat restraint harness is P/N 10223-12, 102335-1, 102335-2, 102335-3,
or 112409-101 continue to step C.
(2)
If the Pilot/Copilot seat restraint harness is not P/N 10223-12, 102335-1, 102335-2,
102335-3, or 112409-101 continue to step G.
Create a log card for the seat restraint harness if one has not been previously created.
ONE-TIME
INSPECTION
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Page 3
S-70/H-60 ALERT
SERVICE BULLETIN
ASB 70-02-046
Basic Issue ▪ June 30/22
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
NOTE: The Retirement Date (RET DATE) is located on the four labels on the restrain harness
(Figure 1. Restraint Label) assembly both lap belts, shoulder strap, and tie down strap
and is recorded MM/YY. The restrain harness’ service life is valid through the end of the
RET DAT month.
D.
Inspect restrain harness RET DATE:
NOTE: Completion of the inspection in accordance with this ASB allows the service life to
be extended no more than 12 months but not to exceed 60 months service life
limit.
(1)
If the RET DATE field located on the restraint harness is blank:
NOTE: The retirement date is 48 months after the service date. If service date is
unknown the default retirement date is 48 months from the date in the DATE
OF MFG field.
(a)
If no date has been recorded in the RET DATE field fill in the RET DATE.
NOTE: To be considered suitable storage environment the harness shall be protected
from dampness direct sunlight, contamination, and chemicals.
NOTE: Service life is the period from when the restraint is removed from storage. Except
for harnesses on aircraft which have been held in storage from delivery. In this
case the service life would begin from date aircraft is taken out of storage.
NOTE: RET DATE shall not exceed 120 months from the DATE OF MFG.
(2)
If the RET DATE field located on the restraint harness is present:
(a)
If the RET DATE has been previously filled out, verify it is no greater than 48 months
from the service date.
(b)
If the service date is not known, then the default retirement date will be no greater
than 48 months from the DATE OF MFG.
(c)
If a date entered in the RET DATE field does not meet either condition; cross date
out, follow RET DATE field left blank guidance above.
NOTE: If there is more than one RET DATE for the restrain harness, record the earliest date.
NOTE: The restraint harness service life is valid through the end of the RET DATE month.
E.
Page 4
Enter the date using MM/YY format in helicopter logbook using form IAW DA pam 738-751.
ONE-TIME
INSPECTION
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S-70/H-60 ALERT
SERVICE BULLETIN
ASB 70-02-046
Basic Issue ▪ June 30/22
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
Figure 1. Restraint Label
NOTE: Inspections should be performed without magnification under good lighting conditions.
NOTE: If two or more occurrences of marginal wear conditions exists, the restrain harness shall
be replaced
NOTE: If marginal wear conditions exist within 2 inches of a restrain anchor (Figure 2. No
Marginal Wear Allowed at Anchor) the restrain harness shall be replaced.
NOTE: If damage that is not specifically addressed in this ASB is found the restrain harness
shall be replaced.
F.
Inspect Pilot/Copilot seat restraint harness condition:
(1)
Inspect restraint harness for fraying in the form of broken filaments in the wrap
(longitudinal) yarns or weft (transverse) yarns (Figure 3. Edge Fray on Webbing):
(a)
If broken filaments extend greater than 10% of the width of the webbing replace
restraint harness in accordance with applicable S-70/H-60 Maintenance Manual.
(b)
If broken filaments obscure identity of any yarn replace restraint harness in
accordance with applicable S-70/H-60 Maintenance Manual.
(c)
If fraying causes any improper operation of any portion of the restraint system
replace restraint harness in accordance with applicable S-70/H-60 Maintenance
Manual.
ONE-TIME
INSPECTION
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Page 5
S-70/H-60 ALERT
SERVICE BULLETIN
ASB 70-02-046
Basic Issue ▪ June 30/22
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
Figure 2. No Marginal Wear Allowed at Anchor
Figure 3. Edge Fray on Webbing
Page 6
ONE-TIME
INSPECTION
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S-70/H-60 ALERT
SERVICE BULLETIN
ASB 70-02-046
Basic Issue ▪ June 30/22
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
(2)
Inspect restraint harness for cuts or tears:
(a)
(b)
Inspect for transverse cuts or tears (Figure 4. Transverse Cut or Tear Inspection):
1.
If any cut or tear reaches edge replace restraint harness in accordance with
applicable S-70/H-60 Maintenance Manual.
2.
If any cut or tear spans more than 15 yarns replace restraint harness in
accordance with applicable S-70/H-60 Maintenance Manual.
Inspect for longitudinal cuts or tears (Figure 5. Longitudinal Cut or Tear Inspection):
1.
If any longitudinal cuts exceed 0.25 inches in length replace restraint harness in
accordance with applicable S-70/H-60 Maintenance Manual.
2.
If any holes are found in webbing replace restraint harness in accordance with
applicable S-70/H-60 Maintenance Manual.
Figure 4. Transverse Cut or Tear Inspection
ONE-TIME
INSPECTION
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Page 7
S-70/H-60 ALERT
SERVICE BULLETIN
ASB 70-02-046
Basic Issue ▪ June 30/22
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
Figure 5. Longitudinal Cut or Tear Inspection
(3)
Inspect restraint harness for broken stitching where webbing is sewn to component parts:
NOTE: The zigzag stitching near the stitching pattern is not a structural stitch.
(a)
Inspect for broken structural stitches (Figure 6. Broken Stitch Inspection):
1.
Page 8
If four or more structural stiches on the same structural stitch pattern are
broken replace restraint harness in accordance with applicable S-70/H-60
Maintenance Manual.
ONE-TIME
INSPECTION
This document contains export-controlled information. See WARNING on first page.
S-70/H-60 ALERT
SERVICE BULLETIN
ASB 70-02-046
Basic Issue ▪ June 30/22
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
Figure 6. Broken Stitch Inspection
(4)
Inspect restraint harness for fading (Figure 7. Fading Inspection):
NOTE: The easiest method for checking webbing for fading is to compare covered
areas with light exposed surfaces of the webbing.
(a)
If fading of the webbing has occurred replace restraint harness in accordance with
applicable S-70/H-60 maintenance manual.
(b)
Inspect covered area that loops through the anchor with the exposed area within 2
inches of the anchor (Figure 8. Fading Inspection at Anchors). If any variation in
color is present replace restraint harness in accordance with applicable S-70/H-60
Maintenance Manual.
Figure 7. Fading Inspection
ONE-TIME
INSPECTION
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Page 9
S-70/H-60 ALERT
SERVICE BULLETIN
ASB 70-02-046
Basic Issue ▪ June 30/22
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
Figure 8. Fading Inspection at Anchors
(5)
Inspect restraint harness for fungus or mold:
(a)
(6)
If evidence of fungus or mold is found:
1.
Clean restraint harness using lint free cloth wet with a solution of soap and
warm water.
2.
Dry restraint harness with clean dry lint free cloth.
(b)
If fungus or mold cannot be cleaned off or if the webbing has been damaged from
fungus/mold replace restraint harness in accordance with applicable S-70/H-60
Maintenance Manual.
(c)
If no evidence of fungus or mold is found or has been cleaned continue inspection.
Inspect restraint harness for contamination or soiling:
NOTE: Exposure to foreign substances may cause restraint harness to lose
flexibility resulting in the webbing unable to adjust properly through the
adjustment hardware.
(a)
(b)
Page 10
If contamination or soiling is found:
1.
Compare flexibility of contaminated or soiled webbing against uncontaminated
portions of the restrain harness:
2.
If flexibility is compromised replace restraint harness in accordance with
applicable S-70/H-60 Maintenance Manual.
3.
If flexibility is uncompromised continue to step G.
If contamination or soiling is not found continue to step G.
ONE-TIME
INSPECTION
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S-70/H-60 ALERT
SERVICE BULLETIN
ASB 70-02-046
Basic Issue ▪ June 30/22
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
MAKE SURE ALL FOREIGN OBJECT DEBRIS (FOD) IS REMOVED
BEFORE RETURNING HELICOPTER TO SERVICE.
G.
Inspect for any remaining FOD. Clean as required to remove any remaining FOD.
H.
Return helicopter to service.
I.
Record of compliance:
(1)
Make helicopter logbook entries to show compliance with this ASB as follows:
(a)
Make helicopter level logbook entry on form SA7343-15 (Aircraft ASB and CSN
Release Signoff).
(b)
When ASB modifies a component that can be removed from this helicopter:
1.
Make component log card entries on forms SA7343-22 (Aircraft Component
Log Cards) & SA7343-21 (Component Log Cards), as applicable.
2.
If a component modified by this ASB does not have a log card and the ASB
does not create one, then annotate compliance on the next higher assembly
that the component belongs to which does have a log card.
NOTE: If access to www.Sikorsky360.com is unavailable, complete attached ALERT
SERVICE BULLETIN COMPLIANCE RECORD CARD and return it to Sikorsky
Aircraft Corporation.
(2)
Make an appropriate electronic compliance entry in the E-Notification section at
www.Sikorsky360.com. Refer to User Guide located on the www.Sikorsky360.com/ENotification Search page.
ONE-TIME
INSPECTION
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Page 11
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SIKORSKY AIRCRAFT CORPORATION
FACSIMILE NUMBER (817) 762-6715
EMAIL ADDRESS: product_safety.gr-sik@lmco.com
ATTENTION: Gr-SIK, Product_Safety
SIKORSKY AIRCRAFT CORPORATION
IMPORTANT NOTICE
Upon COMPLIANCE with the attached ASB, Sikorsky requests your cooperation
in completing and returning this ENTIRE PAGE by MAIL, FAX, or scan &
EMAIL.
Please fill in the requested information at the bottom of the page, so we may maintain
proper records documenting the configuration of your aircraft. This information is useful
when determining configuration and effectivity of issues affecting fielded aircraft.
This request is in keeping with our policy to assure that our customers receive the latest
information applicable for the maintenance of your aircraft. Thank you.
ALERT SERVICE BULLETIN:
No. 70-02-046
________________
Compliance Record Card
AIRFRAME – Pilot and Copilots Seats – One-Time Inspection of Pilot and Copilot
TITLE: ___________________________________________________________________
Seat Restraint Harness.
___________________________________________________________________
___________________________________________________________________
OWNER/OPERATOR: _____________________________________________________
SUBMITTED BY: ___________________________ DATE:
____________________
FOLLOWING SERIAL NUMBERS ARE NOT AFFECTED BY THIS ASB
ASB HAS BEEN COMPLIED WITH ON HELICOPTER SERIAL NUMBERS:
___________
___________ ___________
___________
___________ ___________
___________
___________ ___________
___________
___________ ___________
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Necessary
BUSINESS REPLY MAIL
FIRST-CLASS MAIL
PERMIT NO. 432
BRIDGEPORT CT
POSTAGE WILL BE PAID BY ADDRESSEE
SIKORSKY AIRCRAFT CORPORATION
Commercial Systems and Services
Mailstop K100
124 QUARRY ROAD
TRUMBULL, CT 06611 U.S.A.
ATTENTION:
Gr-SIK, Product_Safety
Please complete the form on the reverse side and FAX to
FACSIMILE NUMBER (817) 762-6715
Or scan and email to:
EMAIL ADDRESS: product_safety.gr-sik@lmco.com
or fold and return ENTIRE form to Sikorsky Aircraft Corporation
This document contains export-controlled information. See WARNING on first page.