What is the maximum oil pressure for a windmill start?

What is the maximum oil pressure for a windmill start?

• A. 182 PSI
• B. 95 PSI
• C. 100 PSI
• D. 150 PSI

Answer: (A)

During a windmill start the engine is being turned by the airstream while the starter isn’t driving the engine. The oil pump is still driven by the accessory gear train, so oil pressure rises as the engine spins up. To protect the oil system during this condition, there is a defined maximum oil pressure that can be observed. For the CRJ-550’s engine family, that limit is 182 psi. Reaching this value is acceptable during windmilling, while higher readings would indicate a fault or improper start and require action. The other listed pressures are associated with different operating scenarios and not the windmill-start limit.

During a windmill start the engine is being turned by the airstream while the starter isn’t driving the engine. The oil pump is still driven by the accessory gear train, so oil pressure rises as the engine spins up. To protect the oil system during this condition, there is a defined maximum oil pressure that can be observed. For the CRJ-550’s engine family, that limit is 182 psi. Reaching this value is acceptable during windmilling, while higher readings would indicate a fault or improper start and require action. The other listed pressures are associated with different operating scenarios and not the windmill-start limit.