Dual Oxygen

No failure report names the dual oxygen. 9 FAA approvals let 2 companies make a replacement dual oxygen, Platinum Aviation Group holding the most (5).

Approved replacement parts 9 parts manufacturer approvals

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

Platinum Aviation Group 5 Ametek Aerospace 4

For these models most: Airbus Helicopters AS355 TwinStar (2), Aerospatiale AS-355 (2).

Maker	Part	Replaces	Fits	Granted	Status
Platinum Aviation Group	Dual Oxygen System, Patient All parts listed on Master...	Modification Part	Eurocopter France AS-355E, AS-355F, AS-355F1	2003-03-02	current
Platinum Aviation Group	Dual Oxygen System-E.M.S. All parts listed on Master...	Modification Part	Eurocopter France SA-360C	2003-03-02	current
Platinum Aviation Group	Dual Oxygen System All parts listed on Master...	Modification Part	Eurocopter France SA-365N	2002-01-07	current
Platinum Aviation Group	Dual Oxygen System, Patient All parts listed on Master...	Modification Part	Eurocopter France AS-355E, AS-355F, AS-355F1	2002-01-07	current
Platinum Aviation Group	Dual Oxygen System-E.M.S. All parts listed on Master...	Modification Part	Eurocopter France SA-360C	2002-01-07	current
Ametek Aerospace	Dual Oxygen Press Indicator 521981	LASC 673955-103	Lockheed L-1011 (S/N 1083 & Up)	1993-11-18	current
Ametek Aerospace	Dual Oxygen Press Indicator 521932	LASC 673955-101	Lockheed L-1011 (S/N 1083 & Up)	1993-11-18	current
Ametek Aerospace	Dual Oxygen Press Indicator 521932	LASC 673955-101	Lockheed L-1011 (S/N 1083 & Up)	1993-11-18	current
Ametek Aerospace	Dual Oxygen Press Indicator 521981	LASC 673955-103	Lockheed L-1011 (S/N 1083 & Up)	1993-11-18	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.