Patent ID: 8438949

Claim:
A gas turbine engine accessory box comprising: an accessory shaft for driving an accessory of the gas turbine engine, the accessory shaft to be connected to a main shaft in a gas turbine engine through a gear train; a first drive connection for driving said accessory shaft; a biased drive member including a second drive connection to be selectively brought into contact with said first drive connection to allow rotation of the main shaft, said biased drive member biasing said second drive connection out of contact with said first drive connection; said second drive connection includes gear teeth that are selectively brought into engagement with gear teeth on said first drive connection; said second drive connection including a shaft guided within a bore in a housing, with said gear teeth on said second drive connection being beyond an inner end of said bore, an outer end of said shaft not extending outwardly beyond an end face of said housing, and not outwardly of said bore, even in a retracted position at which said biased drive member biases said second drive connection away from said first drive connection; said gear teeth of the second drive connection extending radially outwardly of the inner end of the bore, and are radially larger than the bore; and wherein said gear teeth on said second drive connection include a spline drive having the same number of teeth as are on an internal surface of said first drive connection.