Scott AV-3000 Technical Bulletin

Concerning SCOTT AV-3000® Facepieces

DATE: January 8, 2008
TO: All Users of SCOTT AV-3000® Facepieces

SOME USERS OF AV-3000 F ACEPIECES HA VE REPORTED SEP ARA TION OF THE HEAD HARNESS
FROM THE FACEPIECE AT THE RUBBER ATTACHMENT TAB. SEPARATION OF THE TAB MAY
RESUL T IN EXPOSING THE USER TO THE A TMOSPHERE THE RESPIRA TOR WAS INTENDED TO
PROTECT THE USER AGAINST.

Carefully review this entire notice before taking action.
SCOTT has learned that some AV-3000 facepieces have separated at the rubber tab which connects

the head harness to the facepiece seal and lens.

FIGURE 1

AV-3000 Facepiece

Based on laboratory testing, the force needed to damage the faceseal is well beyond what is needed
to properly don a facepiece and achieve a good face-to-facepiece seal. As a result, most users have
not experienced damage to their equipment. To achieve a good face-to-facepiece seal, the AV-3000

facepiece requires less tension on the head harness straps than some of the other SCOTT Facepiece
Models. This may lead some users to over tighten the straps on the AV-3000 facepiece.

Because reducing the potential of any risk begins with basic procedures, SCOTT is reminding users to
follow the steps in the Operation and Maintenance instructions regarding donning the facepiece. Prior
to donning your facepiece, inspect your respirator as discussed in your organized respiratory protection
program or as discussed in the Operations and Maintenance instructions originally supplied with your
respirator . Additional copies of the Operations and Maintenance instructions are available from SCOTT
upon request.

Page 1 of 4 H/S 6678

DONNING THE AV-3000 FACEPIECE

To begin use of respirator, don the facepiece (i.e., place facepiece on face and obtain a proper seal) as
follows:

1. Examine the facepiece assembly to be certain the nose cup inhalation valves are installed, the
nose cup is correctly positioned inside the face seal chin cup, and nose cup is properly seated
between the flanges of the voicemitter ducts.

2. Adjust the head straps to the full outward position.

3. Hold the head harness out of the way with one hand while placing the facepiece on the face with
the other hand.

NOTE

ENSURE THAT THE CHIN IS PROPERLY LOCATED IN THE CHIN POCKET OF THE FACEPIECE.

4. Pull the head harness over the head and ensure that straps are lying flat against the head and
neck with no twists.

NOTE

IF THE F ACEPIECE IS EQUIPPED WITH A RUBBER HEAD HARNESS, POSITION THE TOP CENTER
OVER THE CROWN OF THE HEAD. MAINTAIN THE HEAD HARNESS IN THIS POSITION WHILE
TIGHTENING THE STRAPS.

5. Tighten the neck straps by pulling the two lower strap ends toward the rear of the head.

PULL TOWARD
REAR OF HEAD

FIGURE 2

PULLING THE TWO

LOWER STRAPS

6. Verify that the head harness is lying flat against the back of the head by stroking the harness
using one or both hands. Retighten neck straps.

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