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DEPOT LEVEL MAINTENANCE OF THE PROPELLANT HANDLERS ENSEMBLE
DENNIS J. DUDZINSKILIFE SUPPORT MANAGER
WYLE LABORATORIES(321) 853-9333
Maintenance
• Perform all levels of maintenance for all NASA and Air Force customers– Inspection– Repair– Overhaul– Rebuild/Manufacture
Maintenance
• Inventory comprised of over 10,000 pieces of equipment– Protective Clothing/Hazmat Suits– Cryogenic Equipment– Self Contained Breathing Apparatus– Emergency Breathing Equipment– Airline Breathing Apparatus– Medical Resuscitators
Operations
• Preoperations setup of equipment• Assist onsite
– Donning/Doffing Equipment• Large Volume – over 100 “suitings”/day
– Monitor Operations– Transport “Suited” operators
• Equipment/Personnel Deployment “offsite”
PPE Inventory
SCAPE
• Self Contained Atmospheric Protective Ensemble– Predates Shuttle Operations (1960s)– Equipment evolved to accommodate the
needs for all programs– Current SCAPE (Propellant Handlers
Ensemble – PHE) in use since 1987
Category I SCAPE
• Mobile• Internal Cryogenic Air Supply
(Environmental Control Unit)
Category I SCAPE
Category I SCAPE
Category IV SCAPE
• Airline Supply• Portable Air Supply for Ingress/Egress
Category IV SCAPE
CATEGORY IV SCAPE
PHE
• Available in two modes– Self Contained (CATEGORY I)– Airline Supplied (CATEGORY IV)
• Incorporates many features– Detachable Boots and Gloves– “Bubble” or Flat Visor– Internal Air Distribution System
PHE
• Protection Factor (PF) Testing• Protection Factor Test Facility (PSTF) at
Aberdeen Proving Grounds– Passing percentages of 100% at a PF of
50,000 for preoperational and operational exercises
Maintenance Process
• Performed each time the ensemble is worn and restores to reusable condition
• Preserves established protection factors• Process incorporates original design
requirements and knowledge obtained by “Lessons Learned”
Cleaning• Performed after each use• Shower (inside and outside) with warm water
and biodegradable detergent
Drying
• Drying accomplished by forced warm air
Visual Inspection
• Light Inspection (small holes)• Checklist of criteria to be performed• Material degradation identified
– Damage Includes Holes, Tears, Scuffs, Damaged Components
– Repairs accomplished and could include replacement of suspect fabric or rebuild
Performance Testing
• Pressure (leak) test
Performance Testing
• Relief Valve Reverse Flow (Leak) Test• Mitigate vapor Intrusion during transient
negative pressure effects
Performance Testing
• Airline Adapter Flow Test
Performance Testing
• Communications Test
Final Inspection• Quality Assurance Final Acceptance
– Validates that all tests have been performed– Performs final visual inspection – Stamps approval on “go” tag affixed to suit
Boot/Glove Performance Testing
• Each Boot and Glove tested after use– Pressurized and submerged in water– Bubble leakage determines pass/fail
• Visual Inspection– Material Degradation
Boot/Glove Performance Testing
• Glove/Boot Pressure Test
Ancillary Equipment
• Environmental Control Unit– Utilizes Liquid Air (20% - 30% Oxygen)– Recycle and Performance Testing
Ancillary Equipment
• Liquid Air Cart – Fill, Operate and Maintain
Data Collection
• Infield Data includes:– Operator/Date/Location of Operation– Operator Comments/Concerns– Commodity (Chemical) Used During
Operation– Damage noted during visual inspection– Verification of Performance Test (Results)
Reporting Application
• Location/Operator-specific information• Distributed to Users• Enables review of operational areas, work
practices or procedures for causes of damage – Results in damage prevention– Awareness leading to improving operational
safety– Tracks equipment performance
SCAPE INFIELD DAMAGE
0.000
5.000
10.000
Mar-05
Apr-05
May-05
Jun-05
Jul-05
Aug-05
Sep-05
Oct-05
Nov-05
Dec-05
Jan-06
Feb-06
MONTH AND YEAR
DA
MA
GE
RA
TIO
6.43N/A06.5N/A1.571.21N/AN/AN/A0.980.55
2.784.63.934.112.30.640.904.25N/A0.402.880.64
N/A4.75N/AN/AN/A2.00N/A2.061.81N/A2.820.50
7.956.5N/A9.5N/AN/A2.50N/AN/AN/AN/AN/A
FEBJANDECNOVOCTSEPAUGJULJUNMAYAPRMARMONTH
060605050505050505050505YEAR
PERCENTAGE OF DAMAGE (RATIO)s PER MONTH BY SPECIFIC LOCATION
a. Damage ratio is derived by: TOTAL DAMAGE/TOTAL RECORDED SUITINGSb. Damage is defined as operator-incurred defects during use of ensemble.
Additional Reports
• Infield Performance• Ad Hoc Reports
Anomaly Investigation
• Anomalies recorded during operation• Investigation results
– Findings added to “Lessons Learned”– Potential maintenance improvements – Potential operational improvements (Safety)– Potential equipment modification (Design)– Potential training improvements
Investigation Results
• Examples of Findings– Decontamination Shower Head Installed
Backward and Tore Suit– Ground Support Equipment positioned in
operators path leading to recurring damage in ankle area
Summary
• Closed Loop System– Equipment Designed for use in Environment– Data collected during actual use– Data distributed to users, maintainers and
designers– Continuous evolution of process to address
challenges and evaluate improvements to training, ensemble design and operational processes
