TN-20842 Houston Fire Department – Status Investigation Report 

1

PPE CASE

Personal Protective Equipment Conformity Assessment Studies and Evaluations

Evaluation of a Self-Contained Breathing Apparatus for Potential 

Contribution to a Fatal Event in the Fire Service

Houston, Texas Fire Department Request for Scott® Safety Air-Pak® 4.5, 4500 psi 

unit with NIOSH Approval Number TC-13F-212CBRN 

(August 15, 2016)

As part of the National Institute for Occupational Safety and Health

(NIOSH) Fire Fighter Fatality Investigation and Prevention Program 

(FFFIPP), the National Personal Protective Technology Laboratory

(NPPTL) agreed to examine and evaluate a self-contained breathing 

apparatus (SCBA) unit identified as Scott® Safety model Air-Pak® 4.5,

4500 psi, 30-minute,SCBA.

This SCBA status investigation was assigned NIOSH Task Number 

20842. The NIOSH Division of Safety Research (NIOSH/DSR) and the

Houston Fire Department were advised that NIOSH/ NPPTL would

provide a written report of the inspections and any applicable test

results.

The SCBA unit was shipped to the NIOSH facility in Morgantown, West 

Virginia on May 13, 2016. The unit was taken to the lower floor of

the lab, room 1513, for secured storage. The SCBA unit was then

removed from storage for inspection on May 13, 2016 and was placed

back into secured storage until the testing began on August 5, 2016.

NIOSH evaluated one SCBA 

unit used by a fire fighter 

involved in a fatal event. 

The SCBA was not found to 

contribute to the fatality. 

A qualified service 

technician should always 

inspect, repair, test, clean, 

and replace damaged 

components of any SCBA 

involved in an incident 

before it may be returned to 

service.
TN-20842 Houston Fire Department – Status Investigation Report 

2

Disclaimer

The purpose of Respirator Status Investigations is to determine the conformance

of each respirator to the NIOSH approval requirements found in Title 42, Code

of Federal Regulations, Part 84. A number of performance tests are selected

from the complete list of Part 84 requirements and each respirator is tested in

its “as received” condition to determine its conformance to those

performance requirements. Each respirator is also inspected to determine its

conformance to the quality assurance documentation on file at NIOSH.

In order to gain additional information about its overall performance, each

respirator may also be subjected to other recognized test parameters, such

as National Fire Protection Association (NFPA) consensus standards. While the

test results give an indication of the respirator’s conformance to the NFPA

approval requirements, NIOSH does not actively correlate the test results from

its NFPA test equipment with those of certification organizations which list

NFPA-compliant products. Thus, the NFPA test results are provided for

information purposes only.

Selected tests are conducted only after it has been determined that each

respirator is in a condition that is safe to be pressurized, handled, and tested.

Respirators whose condition has deteriorated to the point where the health

and safety of NIOSH personnel and/or property is at risk will not be tested.
TN-20842 Houston Fire Department – Status Investigation Report 

3

Investigator Information

The SCBA performance tests were conducted by Karis Kline (Contractor) and Jeremy Gouzd (Fellow). 

The SCBA inspections were performed by Karis Kline and Jeremy Gouzd and this report was written

by Jeremy Gouzd. The investigators are part of the Evaluation and Testing Branch, National Personal

Protective Technology Laboratory, National Institute for Occupational Safety and Health, located in 

Morgantown, West Virginia.

NIOSH Task Number 20842

SCBA Inspection

The unit was removed from the packaging in room 1513 and inspected on May 13, 2016 by Jeremy

Gouzd (Fellow), Karis Kline (Contractor) Morgantown Testing Team (MTT), NPPTL. The SCBA was

identified as the Houston Fire Department SCBA and the SCBA was extensively examined,

component by component, in the condition received to determine how well the unit conformed to 

the NIOSH-approved configuration. The unit was identified as the Scott® Safety Company model

Air-Pak® 4.5, 30 minute, 4500 psi unit, NIOSH approval number TC-13F-212CBRN. The visual 

inspection process was documented photographically.

The complete SCBA inspection is summarized in Appendix I. The condition of each major

component of the SCBA that was photographed with a digital camera is contained in Appendix III.
TN-20842 Houston Fire Department – Status Investigation Report 

4

SCBA Testing

The purpose of the testing was to determine how well the SCBA conformed to the approval

performance requirements of Title 42, Code of Federal Regulations, Part 84 (42 CFR 84). Further

testing was conducted to provide an indication of the SCBA’s conformance to the National Fire 

Protection Association (NFPA) Airflow Performance requirements of NFPA 1981, Standard on 

Open-Circuit Self-Contained Breathing Apparatus for the Fire Service, 1997 Edition.

NIOSH SCBA Certification Tests (in accordance with the performance requirements of 42 

CFR 84):

1. Positive Pressure Test [§ 84.70(a)(2)(ii)]

2. Rated Service Time Test (duration) [§ 84.95]

3. Static Pressure Test [§ 84.91(d)]

4. Gas Flow Test [§ 84.93]

5. Exhalation Resistance Test [§ 84.91(c)]

6. Remaining Service Life Indicator Test (low-air alarm) [§ 84.83(f)]

National Fire Protection Association (NFPA) Tests (in accordance with NFPA 1981, 1997 

Edition):

7. Airflow Performance Test [Chapter 5, 5-1.1]

Appendix II contains the complete NIOSH test report for the SCBA. Tables ONE and TWO

summarize the NIOSH and NFPA test results.

Summary and Conclusions

An SCBA unit was submitted to NIOSH/NPPTL by the Houston Texas Fire Department for

evaluation. The SCBA unit was delivered to NIOSH on May 13, 2016 and extensively inspected

on May 13, 2016. The unit was identified as a Scott® Safety model Air-Pak® 4.5, 4500 psi, 30-

minute, SCBA (NIOSH approval number, TC-13F-212CBRN). A facepiece was not provided with 

the unit. The unit didn’t show any signs of heat damage, but exhibited signs of normal wear and 

tear for the unit. The cylinder gauges showed that the tank was empty. The mask mounted 

regulator (MMR) and sealing area were mostly clean, locking assembly functioned, and inside 

flange had minimal scratching. The NFPA approval label was present and readable. The personal

alert safety system (PASS) functioned and overall condition of the SCBA was good. For detailed 

test results, see appendices below. 
TN-20842 Houston Fire Department – Status Investigation Report 

5

In light of the information obtained during this investigation, NIOSH has proposed no further

action on its part at this time. The SCBA unit was returned to storage pending return to the 

Houston Fire Department. If this unit is to be placed back in service, the SCBA must be repaired,

tested, cleaned, and any damaged components replaced and inspected by a qualified service 

technician, including such testing and other maintenance activities as prescribed by the

schedule from the SCBA manufacturer. Typically, a flow test is required on at least an annual 

basis.

Actions to be Taken by the Fire Departments With SCBAs 

Involved in an Incident

• Any SCBA unit involved in an incident may not be placed back in service until the SCBA has 

been repaired, tested, cleaned and any damaged components replaced and inspected by a

qualified service technician, including such testing and other maintenance activities as

prescribed by the schedule from the SCBA manufacturer. 

• All SCBA units, even those not involved in an incident, should undergo a flow test on an 

annual basis at a minimum.

Actions the PPE Users, Selectors, and Purchasers May Take to 

Further Protect Themselves and Others from Hazards

• Sign up for NPPTL’s Listserv at http://www.cdc.gov/niosh/npptl/sub-NPPTL.html to receive 

email notifications relevant to PPE.

For more information related to personal protective equipment, visit the NIOSH website

www.cdc.gov/niosh/npptl

To receive documents or other information about occupational safety and health topics, contact NIOSH:

Telephone: 1–800–CDC–INFO (1–800–232–4636)

TTY: 1–888–232–6348

CDC INFO: www.cdc.gov/info

or visit the NIOSH website at www.cdc.gov/niosh

For a monthly update on news at NIOSH, subscribe to NIOSH eNews by visiting www.cdc.gov/niosh/eNews
TN-20842 Houston Fire Department – Status Investigation Report 

6

Appendix I

SCBA Inspection Report
TN-20842 Houston Fire Department – Status Investigation Report 

7

 National Personal Protective Technology Laboratory, Evaluation and Testing Branch

Respirator Field Problem

Incoming Inspection Report Summary

The SCBA was received in a cardboard box (refer to Figures 1-2 in Appendix III)

Contact Agency: NIOSH/DSR for the Houston City Fire Department

As received:

• Cylinder included and empty

• Bypass in the “on” position

• Donning switch on, regulator inactive

• No facepiece included

Components and Observations

NOTE: All references to “right” or “left” are from the user’s perspective.

Facepiece:

No facepiece included

MMR with Heads up Display (HUD): (refer to Figures 3-4 in Appendix III).

Air-Pak® plus CBRN with Vibralert and E-Z Flo regulator. 

Regulator assembly P/N: Not Present Other Markings: 02 VJTF126 (hand 

inscribed)

S/N: Not Present MFG Date: Not Present

Task Number: TN-20842 Requestor: NIOSH/DSR for the Houston 

Fire Department

Date Received: May 13, 2016

Date Inspected: May 13, 2016 Description: Fatality

Manufacturer: Scott® Safety Inspected by: Jay Tarley, Jeremy Gouzd, Karis 

Kline

Approval Number: TC-13F-212 CBRN SCBA Type: Open Circuit, Pressure-Demand
TN-20842 Houston Fire Department – Status Investigation Report 

8

• Overall condition is good, some scrapes

• Outer case is good with stickers present

• Donning switch and cover are in fair condition

• Secured to low pressure line

• Bypass in the on position

• Bypass knob normal wear and tear

• Inside flange has scratches

• Sealing area mostly clean

• Locking assembly does function

Low Pressure Line: (refer to Figures 5 in Appendix III).

Scott® partial part number: Not readable

• Overall condition is good, no rips or tears

• Secured at all attachments points

• Quick disconnect in good condition and functions

• Line runs through the shoulder strap to the reducer 

4.5 Pressure Reducer Assembly: (refer to Figures 6-8 in Appendix III).

P/N: Present but unreadable Marking: 4.5 sticker, SN engraved: 0606033582AA

S/N: Present but unreadable

HUD control module part number: 200187-01 

• Overall condition is good, pretty clean 

• All airline connections are secure

High Pressure Line & Cylinder Attachment: (refer to Figures 9-11 in Appendix III).

Cylinder Attachment P/N: 802228-05 Other markings: 0708, Scott + 888 above PN 

for

Assembly 

• Overall condition is good, some scratches

• Cylinder attachments thread clean, threads on and off, “O” ring in place 

• Quick fill and cover in good shape #ETN FD17-1002-10-04

Console Assembly PASS: (refer to Figures 12-13 in Appendix III).

SEI label 2007 ed

HUD # US Patent #50 XXB6, Some unreadable

• Overall condition is good, clean
TN-20842 Houston Fire Department – Status Investigation Report 

9

• Lines in good shape – pressure/electrical

• Gauge lens is readable 

• Protective casing slightly dirty

• Rubber attachment strap present, attached to the PASS console and shoulder strap

• SEI Label attached: NFPA 1982, 1998 edition

PASS Control Module: (refer to Figures 14-15 in Appendix III).

P/N: 200451-01,-11

 200451-02, -12 with Pak tracker – ID#: 00152-74 label

• Overall condition is good

• Held securely to backframe

• Wire connection connected to PASS device

• Wire held secure to backframe and runs to console assembly 

Backframe Assembly: (refer to Figures 16-18 in Appendix III).

S/N: None other markings: SH9 on twice

SEI Label attached, NFPA 1981, 2007 Edition

• Overall fair condition, no bends/cracks in wire frame

• Shoulder straps were attached to the frame

• Cylinder strap and latch are in fair condition, dirty

• Cylinder strap adjuster functional

• Cylinder strap and latch is dirty but functional

• E73-2 marked on back frame

• CBRN label present

• NIOSH label present, TC-13F-212CBRN

Straps & Buckles: (refer to Figure 19 in Appendix III).

• Overall strap condition is good

• Both shoulder straps attached at the top of the back frame

• Hose lines and wires pass through shoulder straps

• All adjustable buckles move and hold in place

• Waist area buckle latches and releases

• Right side waist strap worn

• Lumbar strap in good condition with some dirt and minimal fraying at attachment points on 

either side of the pad 
TN-20842 Houston Fire Department – Status Investigation Report 

10

Cylinder & Valve Assembly: (refer to Figures 20-23 in Appendix III).

Some DOT and other information Other Markings: Red “44” paint

DOT-SP 10915-4500 Scott P/N: 10009673

TC-SU-5134-310 Scott logo visible

IL 754674 Luxfer REE 110

Luxfer P/N: L65G-002 Manufacture Date: 12/14 45 Minute, 4500 PSIG

Cylinder Valve SN: 11551502010157

• Overall condition is fair to good as there are some surface scratches and dirt present

• Gauge is readable

• Threads are okay, some corrosion

• As received cylinder valve fully closed with no air remaining

• Rubber bumper at base on cylinder valve is in good condition 
TN-20842 Houston Fire Department – Status Investigation Report 

11

Appendix II

SCBA Test Results
TN-20842 Houston Fire Department – Status Investigation Report 

12

National Personal Protective Technology Laboratory, Evaluation and Testing Branch

SCBA Test Report

Task Number: TN-20842

Manufacturer: Scott® Safety

NIOSH Approval Number: TC-13F-212CBRN

Tests Performed by: Jeremy Gouzd, Karis Kline

Report written by: Jeremy Gouzd

Date of Report: August 12, 2016

I. Background

On May 13, 2016, a SCBA unit from the Houston Fire Department was delivered to the NIOSH

facility in Morgantown, West Virginia. The unit was initially removed from the shipping container 

May 13, 2016 in lab H-1513 for inspection by Jeremy Gouzd (Fellow) and Karis Kline (Contractor)

Morgantown Testing Team (MTT), NPPTL. The SCBA was identified as the Houston Fire

Department SCBA and was extensively examined, component by component, in the condition

received to determine how well the SCBA conformed to the NIOSH-approved configuration. The 

unit was identified as the Scott® Safety Company model Air-Pak® 4.5, 45 minute, 4500 psi unit,

NIOSH approval number TC-13F-212CBRN. The visual inspection process was documented

photographically.

II. Test Outlines

1. POSITIVE PRESSURE TEST – NIOSH Test Procedure No. 120 42 CFR

Part 84 Reference: Subpart H, § 84.70 (a)(2)(ii)

Requirement:

The pressure inside the facepiece in relation to the immediate environment is positive during 

both inhalation and exhalation.

Procedure:

A breathing machine with a 622 kg.-m./min. cam operating at 24 RPM with a 40-liter per

minute flow rate (115 liters per minute peak flow) is connected to an anthropometric head

for cycling. A pressure tap in the head is connected to a transducer, which in turn is

connected to a strip chart recorder for determining the pressure in the facepiece.
TN-20842 Houston Fire Department – Status Investigation Report 

13

ResultsThe unit was tested on August 5, 2016 and met the test requirement. The facepiece was

replaced prior to testing as there was not one provided. The HUD, remote gauge, and

donning switch functioned normally.

Inhalation Breathing Resistance:

(inches of water column)

Pass / Fail 0.1

PASS

2. RATED SERVICE TIME TEST – NIOSH Test Procedure No. 121

42 CFR Part 84 Reference: Subpart F, § 84.53 (a) and Subpart H, § 84.95 (a) and (b)

Requirement:

Service time will be measured while the apparatus is operated by a breathing machine as

described in § 84.88. The open-circuit apparatus will be classified according to the length of 

time it supplies air or oxygen to the breathing machine. Classifications are listed in

§ 84.53.

Procedure:

A breathing machine with a 622 kg.-m./min. cam operating at 24 RPM with a 40 liters per

minute flow rate is connected to an anthropometric head for cycling. A pressure tap in the

head is connected to a transducer, which in turn is connected to a strip chart recorder for

determining the pressure in the facepiece. The breathing machine continues to run until the

inhalation portion of the breathing curve falls below the minimum requirement.

Results - Tested on August 5, 2016, the SCBA met the test requirement.

Test Notes: The measured service time (adjusted to correspond with the recorded

breathing cycles) was more than the rated service time of 45 minutes. The PASS unit did

function during the test. The SCBA did not go negative on inhalation, but maintained

positive pressure in the facepiece at the same level.

Measured Service

Time

Minutes Seconds

51 25

Pass/Fail PASS

3. STATIC PRESSURE TEST – NIOSH Test Procedure No. 122

42 CFR Part 84 Reference: Subpart H, § 84.91 (d)
TN-20842 Houston Fire Department – Status Investigation Report 

14

Requirement:

The static pressure (at zero flow) in the facepiece shall not exceed 38 mm. (1.5 inches)

water-column height.

Procedure:

The facepiece is fitted to an anthropometric head for testing. A pressure tap in the head is

connected to a calibrated manometer. Full cylinder pressure is applied to the unit at zero

flow and a reading from the manometer is recorded.

Results – Tested on August 9, 2016, the SCBA met the test requirement.

Facepiece Static Pressure:(inches of water 0.51

column)

Pass / Fail Pass

4. GAS FLOW TEST – NIOSH Test Procedure No. 123

42 CFR Part 84 Reference: Subpart H, § 84.93 (b) and (c)

Requirement:

The flow from the apparatus shall be greater than 200 liters per minute when the pressure in 

the facepiece of demand apparatus is lowered by 51 mm. (2 inches) water column height

when full container pressure is applied. Where pressure demand apparatus are tested, the

flow will be measured at zero gage pressure in the facepiece.

Procedure:

A pressure tap in the anthropometric head is connected to a manometer for determining

when the pressure inside the facepiece is zero. A mass flow meter is connected in line

between the anthropometric head and an adjustable vacuum source to measure flow. The

SCBA cylinder is replaced by a test stand, which is adjusted initially to full cylinder pressure. 

The vacuum source is adjusted during the test to maintain the desired pressure inside the

facepiece. Once the proper facepiece pressure has stabilized, a flow reading is recorded. 

The procedure is then repeated with the test stand adjusted to 500 psig
TN-20842 Houston Fire Department – Status Investigation Report 

15

Results – Tested on August 8, 2016 the SCBA met the test requirement. The bypass

appeared to function normally.

5. EXHALATION RESISTANCE TEST – NIOSH Test Procedure No. 122

42 CFR Part 84 Reference: Subpart H, § 84.91 (c)

Requirement:

The exhalation resistance of pressure-demand apparatus shall not exceed the static

pressure in the facepiece by more than 51 mm. (2 inches) water-column height.

Procedure:

The facepiece is mounted on an anthropometric head form. A probe in the head form is

connected to a slant manometer for measuring exhalation breathing resistance. The airflow 

through the apparatus is adjusted to a rate of 85 liters per minute and the exhalation

resistance is recorded.

Results – Tested on August 9, 2016, the SCBA met the test requirement.

Exhalation Breathing Resistance:

(inches of water column)

1.95

Static Pressure: (inches of water

column)

0.51

Difference: (inches of water column) 1.44

Pass / Fail Pass

Pass/Fail

Applied

pressure

Air Flow (liters per minute)

4500

psig

501.21 Pass

500 psig 472.89 Pass
16

6. REMAINING SERVICE LIFE INDICATOR TEST – NIOSH Test Procedure No. 124

42 CFR Part 84 Reference: Subpart H, § 84.83 (f) and Subpart G, § 84.63 (c)

Requirement:

Each remaining service life indicator or warning device shall give an alarm when the

remaining service life of the apparatus is reduced within a range of 20 to 25 percent of its

rated service time or pressure.

This requirement is modified under § 84.63(c) as follows: For apparatus which do not have 

a method of manually turning off remote gage in the event of a gage or gage line failure the

remaining service life indicator is required to be set at 25% ± 2% of the rated service time or 

pressure.

Procedure:

A calibrated gauge is connected in line between the air supply and the first-stage regulator.

The unit is then allowed to gradually bleed down. When the low-air alarm is activated, the

pressure on the gauge is recorded. This procedure is repeated six times. The average of

the six readings is calculated and recorded.

Results – Tested on August 8, 2016. The test requirement is 25% ± 2%.

Testing Notes:

Run # Alarm 

Point (psig)

VibrAlert

Alarm 

Point (psig)

HUD

1. 1040 1130

2. 1040 1140

3. 1040 1130

4. 1040 1130

5. 1050 1130

6. 1045 1140

Avg. 1043 1133

Pass / Fail Pass PASS
17

7. NFPA AIR FLOW PERFORMANCE TEST

NFPA 1981 (1997 Edition) Reference: Chapter 5, Performance Requirements, Sec. 5-1.1

Requirement:

SCBA shall be tested for air flow performance as specified in Section 6-1, Air Flow

Performance Test, and the SCBA facepiece pressure shall not be less than 0.0 in. (0.0 mm)

water column nor greater than 31⁄2 in. (89 mm) water column above ambient pressure from

the time the test begins until the time the test is concluded.

Procedure:

The required equipment specified in the NFPA standards were used to conduct the tests on

this unit. A pressure tap in the head is connected to a transducer, which in turn is

connected to a flatbed chart recorder for determining the pressure in the facepiece.

Results – Tested on August 11, 2016. The SCBA passed this test.

Test Notes – PASS unit was functional. HUD was functional. Alarm systems were functional. Used a 

stock Scott facepiece as no facepiece was provided

Maximum Facepiece Pressure:

(inches of water column)

2.725

Minimum Facepiece Pressure:

(inches of water column)

0.35

Pass / Fail PASS

III. Disposition:

Following testing, the SCBA unit was returned to the package in which the unit was shipped to

NIOSH and placed in secured storage. The unit was then removed from secured storage and a

download of the data logger was conducted by the MTT in lab H-1513 on September 14, 2016. The

unit was placed back into secured storage until it was shipped back to the fire department.

The results of all tests are summarized in Tables One and Two which follow.
18

TABLE ONE – Summary of NIOSH Test Results –

Task Number: 20842

Manufacturer: Scott® Safety

NIOSH Approval Number: TC-13F-212CBRN

Tests Performed By: Jeremy Gouzd, Karis Kline

Dates of Tests: August 5, 2016 – August 11, 2016

TEST / 42 CFR PART 84 REFERENCE STANDARD RESULT PASS FAIL

1. POSITIVE PRESSURE TEST Reference: 

Subpart H, § 84.70 (a)(2)(ii)

≥ 0.00 INWC

0.1 INWC X

2. RATED SERVICE TIME TEST Reference: 

Subpart F, § 84.53 (a), Subpart H, § 

84.95 (a) and (b) ≥ 30 min.

51 min 25 s X

3. STATIC PRESSURE TEST

Reference: Subpart H, § 84.91 (d)

≤ 1.50 INWC

0.51 INWC

X

4. GAS FLOW TEST (at Full Cylinder

Pressure)

Reference: Subpart H, § 84.93 (b) and (c)

≥ 200 lpm

501.21

LPM

X

4. GAS FLOW TEST (at 500 psig) Reference: 

Subpart H, § 84.93 (b) and (c)

≥ 200 lpm

472.89 LPM X

5. EXHALATION RESISTANCE TEST

Reference: Subpart H, § 84.91 (c)

Difference

≤ 2.00 INWC

1.44 INWC X

6. REMAINING SERVICE LIFE INDICATOR 

TEST (vibrating alarm) Reference: 

Subpart H, § 84.83 (f) and Subpart G, § 

84.63 (c)

Between 1035 and 1215 psig

1043 PSIG X
19

NOTE: The Positive Pressure Test and Rated Service Life Test are run simultaneously.

TABLE TWO – Summary of NFPA Test Results

TEST / REFERENCE STANDARD RESULT PASS FAIL

7. NFPA AIR FLOW PERFORMANCE

Reference: NFPA 1981 (1997 Edition),

Section 5-1.1

≤ 3.50 INWC

Exhalation

Resistance

2.725 INWC X

7. NFPA AIR FLOW PERFORMANCE

Reference: NFPA 1981 (1997 Edition),

Section 5-1.1

≥ 0.00 INWC

Inhalation

Resistance

0.35 INWC X

6. REMAINING SERVICE LIFE INDICATOR 

TEST (light alarm HUD) Reference: 

Subpart H, § 84.83 (f) and Subpart G, § 

84.63 (c)

Between 1035 and 1215 psig

1133 PSIG X
20

Appendix III

SCBA Inspection Report
21

Figure 1: Cardboard box containing SCBA as received

Figure 2: Overview of unit out of bag 

Figure 3: Mask Mounted Regulator

Figure 4: Inside flange, mask mounted regulator

Figure 5: Low pressure hose

Figure 6: Pressure reducer assembly

Figure 7: Interior view of pressure reducer assembly

Figure 8: Top view of pressure reducer assembly

Figure 9: Cylinder attachment overview and relief valve 

Figure 10: Cylinder attachment identifying markings 

Figure 11: Quick fill port on cylinder attachment and overview of threads 

Figure 12: PASS console 

Figure 13: Back of PASS console, SEI label

Figure 14: PASS control module 

Figure 15: Label on side of PASS control module

Figure 16: Overview of pack assembly

Figure 17: Labels inside of pack 

Figure 18: Labels on back frame

Figure 19: Overview of straps and buckles

Figure 20: Overview of cylinder

Figure 21: Overview of cylinder label

Figure 22: Cylinder gauge is readable

Figure 23: Overview of top of cylinder
22

Figure 1: Cardboard box containing SCBA as received

Figure 2: Overview of unit out of bag
23

Figure 3: Mask mounted regulator

Figure 4: Inside flange, Mask mounted regulator 
24

Figure 5: Low pressure hose

Figure 6: Pressure reducer assembly
25

Figure 7: Interior view of pressure reducer assembly

Figure 8: Top view of Pressure reducer assembly
26

Figure 9: Cylinder attachment overview and relief valve

Figure 10: Cylinder attachment identifying markings
27

Figure 11: Quick fill port on cylinder attachment and overview of threads

Figure 12: PASS console
28

Figure 13: Back of PASS console, SEI label

Figure 14: PASS control module
29

Figure 15: Label on side of PASS control module

Figure 16: Overview of pack assembly
30

Figure 17: Labels inside of pack

Figure 18: Labels on back frame
31

Figure 19: Overview of straps and buckles

Figure 20: Overview of cylinder
32

Figure 21: Overview of cylinder label

Figure 22: Cylinder gauge is readable
33

Figure 23: Overview of top of cylinder