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US 12,559,251 B2Granted
Method and apparatus for auxiliary power unit installation
AssigneeThe Boeing Company
InventorsAlan J. Wong, Curtis John Call, Theodore Carl Arnold
Life of this patent
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Abstract
An aircraft is disclosed, including a fuselage having a compartment configured to house refueling apparatus. An auxiliary power unit is mounted in the compartment.
Claims20
A method of installing an Auxiliary Power Unit (APU) in an aircraft, wherein the aircraft includes a refueling hose reel housed in a Hose Drum Unit (HDU), the method comprising:
- retrofitting a HDU compartment in a fuselage to house the APU, wherein the retrofitting step comprises:
- removing the refueling hose reel from the HDU compartment;
- and
- mounting the APU in the HDU compartment.
1 more element
A method of retrofitting an aircraft, comprising:
- removing a refueling apparatus from an un-pressurized internal compartment disposed in a pressurized fuselage of the aircraft, wherein the refueling apparatus comprises a refueling hose reel, and
- mounting an Auxiliary Power Unit (APU) in the un-pressurized internal compartment.
A method of retrofitting a tanker aircraft, comprising:
- removing a refueling Hose Drum Unit (HDU) from a HDU compartment in a fuselage of the tanker aircraft;
- mounting an Auxiliary Power Unit (APU) in the HDU compartment, the mounting step including:
- suspending the APU from an upper wall section of the HDU compartment,
- extending an exhaust duct of the APU through a hose trough of the HDU compartment, and
- altering an exterior access door of the HDU compartment to include an air inlet.
2 more elements
Dependencies are inferred from the claim text.