About Us (Overview)

Welcome to our website. Parnassus is an aerospace system safety and reliability engineering provider which began in 1979 as a systems engineering and program management consultancy. We apply the technical expertise required to perform the analytic tasks set forth in SAE ARP4754A, ARP4761 and MIL-STD-882 including program planning, functional / physical hazard analysis, risk analysis, development of mitigation strategies, PSSA and SSA, SSHA and SAR data item preparation. We apply a rigorous top-down requirements driven approach which ensures comprehensive traceability of all derived requirements to their upper-level system requirements.

Airline Software (ALS)

Created explicitly for aircraft operators, RMO entities and aircraft component OEMs that require real time analysis of aircraft fleet, system, item and ultimately piece part reliability performance.

Network compatible

Sample Lot Inspection (SLI) database is a fully-interactive, SQL based Quality Assurance application tool for Receiving / Incoming Inspection and Material Review Board (MRB) members.

MIL-STD-882E

Military System Safety approach per MIL-STD-882E “The objective of system safety is to achieve acceptable mishap risk through a systematic approach of hazard analysis, risk assessment and risk management.”

System Safety & Reliability Engineering Consulting Services

Parnassus is an aerospace Reliability, Maintainability and System Safety (RMS) engineering consulting company that maintains competencies in avionics, communications equipment, active and passive flight controls, hydraulic pumps, servos and actuators, FADEC, thrust control quadrants and aerial refueling systems, in addition to flight data recorders, airport systems and aircraft cargo loading systems. We can assist in all phases of commercial, military and NASA design and development life cycles, from proposals to requirements capture and management, to new product design and development to flight test and certification. Beyond certification, Parnassus LLC commonly provides critical fielded (in service) services, such as developing and managing cost effective field reliability monitoring activities.

Parnassus Advantage

Parnassus LLC is an aerospace System Safety & Reliability Engineering company. For more then 45 years now, we’ve contracted directly to the industry’s leading aircraft equipment / system manufacturers on more than 75 commercial, space and military development programs.

Billing Rates, Terms and Contract Structures:

Standardized rates typically lower than industry burden rates. Flexible contract structures and terms are available for firm, fixed price (FFP), time and materials (T&M), retainer model, tiered pricing structures, project-based pricing, performance-based pricing, in addition to subscription rates, discounts & offers, and custom pricing plans.

Flexible Responsiveness:

Not all contracts come with comfortable delivery schedules. Accordingly, Parnassus LLC offers standard and expedited responses to RFP’s and contract deliverables.

Remote Integration and Operability:

Parnassus LLC achieves full integration with client data systems while performing most analysis and reporting services remotely from its offices in Tucson, AZ. By leveraging TEAMS, Zoom and other video conferencing services, we are able to support client team meetings, reviews and other functions regardless of their physical location or time zone.

Alana put system engineering, electronic engineering, and reliability engineering teams together, allowed more room for collaborations and communications easily to our team. I highly recommend Alana to work in a high-pace envirnmt

David Chen; Crane-HydroAire

Alana is a hardworking, outstanding Engineer. Her work is always thoughtfully prepared and of very high quality. Alana keeps her technical skills sharp, and is also very organized, highly motivated and easy to work with.

Paul Wulff; Northrop Grumman

I was privileged to have Alana’s RM&S expertise on a number of different program teams. Our customers were equally impressed with the thoroughness and accuracy of her work … Alana is a “First Class” professional.

Eugene Hari; Esterline Palomar Products

System Safety

Reliability Engineering