# US 2026/0062964 A1 · Aircraft door locking system comprising a monitoring system signaling whether the locking system is in a locked or unlocked state > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0062964 A1 - Document ID: US20260062964A1 - Status: Published application - Kind: A1 - Application number: 19/209,677 - Filed: 2025-05-15 - Published: 2026-03-05 - Earliest claimed: 2024-08-30 - Assignees: Airbus Helicopters - Applicants: Airbus Helicopters - Inventors: Fleur HUGUET; Pierre FRUITET; Lilian GAIA; Jérôme DARGNAT - Web page: https://patentgrep.com/patent/US20260062964A1 ## CPC - E05B 41/00: Locks with visible indication as to whether the lock is locked or unlocked {(indicator lights E05B17/10)} - E05B 77/22: Functions related to actuation of locks from the passenger compartment of the vehicle - B64C 1/1407: {Doors; surrounding frames} - B64C 1/1423: {Passenger doors} - B64D 45/0005: {Devices specially adapted to indicate the position of a movable element of the aircraft, e.g. landing gear} - E05B 2047/0068: {Door closed} - E05B 2047/0069: {bolt position} - E05Y 2900/502: for aircraft or spacecraft - E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS - B64C: AEROPLANES; HELICOPTERS - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF ## Abstract A locking system for locking a door comprising at least two locks. The locking system has one position sensor per lock, each position sensor emitting a measurement signal bearing a locked state or an unlocked state of the associated lock, the signaling system comprising a controller receiving the measurement signals and being connected to an alerter, the controller being configured to emit either an unlocking signal when at least one measurement signal bears an unlocked state of the associated lock or a locking signal if each measurement signal bears a locked state of the associated lock, the alerter generating a visual unlocking alert following receipt of the unlocking signal and a visual locking alert following receipt of the locking signal. ## Claims ### Claim 1 A locking system for locking a door in a closed position with respect to a carrier, the locking system comprising at least two locks each capable of immobilizing the door in the closed position, the locking system having a signaling system, wherein the signaling system includes one position sensor per lock, each position sensor emitting a measurement signal bearing a locked state or an unlocked state of the associated lock, the signaling system comprising a controller receiving the measurement signals and connected to an alerter, the controller being configured to emit either an unlocking signal when at least one measurement signal bears an unlocked state of the associated lock or a locking signal if each measurement signal bears a locked state of the associated lock, the alerter generating a visual unlocking alert following receipt of the unlocking signal and a visual locking alert following receipt of the locking signal, the locking alert being different from the unlocking alert. ### Claim 2 (depends on 1) The locking system according to claim 1, wherein each lock comprises an immobilizing member integral with a finger sliding in a slot of a frame of the lock, the immobilizing member and the finger being only movable with respect to the frame between a release position and a blocking position, each position sensor emitting a measurement signal bearing a locked state when the finger is in the blocking position and emitting a measurement signal bearing an unlocked state when the finger is in the release position. ### Claim 3 (depends on 1) The locking system according to claim 1, wherein each lock comprises a shaft extending along an axis of rotation of the immobilizing member, and the position sensor of a lock is mounted on the shaft of this lock. ### Claim 4 (depends on 1) The locking system according to claim 1, wherein the alerter comprises at least one light source for generating the locking alert and the unlocking alert, the locking alert being in the form of a light of a first color and the unlocking alert being in the form of a light of a second color different from the first color. ### Claim 5 (depends on 1) The locking system according to claim 1, wherein the locking system includes a dedicated signaling electrical power source electrically powering the system. ### Claim 6 (depends on 1) The locking system according to claim 1, wherein the locking system is autonomous and independent. ### Claim 7 (depends on 1) The locking system according to claim 1, wherein the controller is configured to emit the unlocking signal and the locking signal for a predetermined time period. ### Claim 8 (depends on 1) The locking system according to claim 1, wherein the signaling system comprises at least one human-machine interface in communication with the controller, the controller being configured to output the unlocking signal and the locking signal as a result of an operation of the human-machine interface. ### Claim 9 (depends on 1) The locking system according to claim 1, wherein the controller is configured to output the unlocking signal and the locking signal as a result of a change in a measurement signal. ### Claim 10 (depends on 1) A door provided with the locking system, wherein the locking system is according to claim 1. ### Claim 11 (depends on 10) The door according to claim 10, wherein the alerter is visible on either side of the door. ### Claim 12 (depends on 10) The door according to claim 10, wherein the door comprises a closure detection system provided with a closure sensor communicating with an alert generator. ### Claim 13 (depends on 10) An aircraft, wherein the aircraft comprises a door according to claim 10. ### Claim 14 (depends on 13) The aircraft according to claim 13, wherein the signaling system is independent of an avionics system of the aircraft.