Accession Number:

AD0678146

Title:

HYDRAULIC VALVE EROSION INVESTIGATION -- 727 ELEVATOR FEEL COMPUTER VALVE.

Descriptive Note:

Technical note,

Corporate Author:

BOEING CO RENTON WASH COMMERCIAL AIRPLANE DIV

Personal Author(s):

Report Date:

1968-09-24

Pagination or Media Count:

65.0

Abstract:

The report covers progress made in one portion of the investigation into the hydraulic control valve erosion problem encountered on 727 and 737 airplanes. The portion of work presented in this report includes testing with the old design LTV PN 401-60547-2 727 elevator feel computer valve with various hydraulic fluids, filters and 4A molecular sieves. The overall investigation also has included evaluation of other factors such as contamination, cavitation, temperature, fluid acidity, fluid additives, control valve materials, control valve port configuration and system back pressure. Author

Subject Categories:

  • Pumps, Filters, Pipes, Tubing, Fittings and Valves

Distribution Statement:

APPROVED FOR PUBLIC RELEASE