Yd Yaw
No failure report names the yd yaw. 4 FAA approvals let 2 companies make a replacement yd yaw, Honeywell International US LLC holding the most (3).
Approved replacement parts 4 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a yd yaw and sell it as an approved part for the models named. These are the companies holding such approvals for a yd yaw:
For these models most: Piper PA-31 Navajo and Chieftain (1), Learjet 55 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Butler Avionics INC. | YD-85 Yaw Computer Controller 501-1579-( ) | 501-1579-( ) | Learjet 55 | 2026-07-10 | current |
| Honeywell International US LLC | YD4 Yaw Damper System Installation Kit 4009527-0501 | Modification Part | Piper PA-31P | 1999-12-01 | current |
| Honeywell International US LLC | YD4 Yaw Damper System Installation Kit for FCS-810 System 4009531-0502 | Modification Part | Beech Raytheon) (C90 | 1999-12-01 | current |
| Honeywell International US LLC | YD4 Yaw Damper System Installation Kit for FCS-810 System 4009531-0501 | Modification Part | Beech Raytheon) (C90 | 1999-12-01 | current |
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.