The U.S. aircraft register, updated daily
Parts

Normal Unlock

No failure report names the normal unlock. 2 FAA approvals let 1 company make a replacement normal unlock, Whippany Actuation Systems LLC holding the most (2).

Approved replacement parts 2 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a normal unlock and sell it as an approved part for the models named. These are the companies holding such approvals for a normal unlock:

MakerPartReplacesFitsGrantedStatus
Whippany Actuation Systems LLCNormal Unlock Actuator R5419M2H10350708SCAirbus A380-841, A380-842, A380-8612015-05-12current
Whippany Actuation Systems LLCNormal Unlock Actuator R5419M1H10350707SCAirbus A380-841, A380-842, A380-8612015-05-12current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.