The U.S. aircraft register, updated daily
Parts

Screwjack Actuator

No failure report names the screwjack actuator. 2 FAA approvals let 1 company make a replacement screwjack actuator, Cef Industries 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 screwjack actuator and sell it as an approved part for the models named. These are the companies holding such approvals for a screwjack actuator:

For these models most: Piper PA-42 (1), Piper PA-31 Navajo and Chieftain (1).

MakerPartReplacesFitsGrantedStatus
Cef Industries LLCScrewjack Actuator 8537Piper 489-516Piper PA-31, PA-31-325, PA-31-3501997-09-01current
Cef Industries LLCScrewjack Actuator 8407Piper 451-813Piper PA-42, PA-42-729, PA-421997-06-24current

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.