Parts · Flight controls

Interlock Valve

3 failure reports named the interlock valve in the last ten years, 3 since 2017, most often on the Boeing 737; the condition most often found was "faulty". 1 FAA approvals let 1 company make a replacement interlock valve, Hydro-Aire Incorporated holding the most (1).

Reports by year

Reports by year, as a table

	reports
2017	1
2018	1
2026	1

Which system the reports file it under last ten years

Flight controls2Landing gear1

Reports by system, as a table

	reports
Flight controls	2
Landing gear	1

Models most often reporting it last ten years

Boeing 7373

Models most reported, as a table

	reports
Boeing 737	3

How it failed the condition found, last ten years

faulty2faulted1

Conditions found, as a table

	reports
faulty	2
faulted	1

Approved replacement parts 1 parts manufacturer approvals

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

Hydro-Aire Incorporated 1

For these models most: Boeing 737 (1).

Maker	Part	Replaces	Fits	Granted	Status
Hydro-Aire Incorporated	INTERLOCK VALVE 38-805-2	S251A101-1	BOEING 737-600 SERIES, 737-700 SERIES,...	2010-11-11	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.