AD 97-21-05

Applies to

All Model DH.125-400A, BH.125-400A and -600A, HS.125-600A and -700A, and BAe 125-800A series airplanes; and Model Hawker 800 and Hawker 800 XP series airplanes (including Military Variants C29A, U125, and U125A airplanes); having serial numbers 1 through 258294 inclusive; on which Modification 252036 has been installed with a high pressure oxygen hose assembly having part number WKA 34609; certificated in any category.

The FAA's summary

This amendment adopts a new airworthiness directive (AD), applicable to certain Raytheon Model DH.125-400A; BH.125-400A and - 600A; HS.125-600A and -700A; BAe 125-800A series airplanes; and Hawker 800 and Hawker 800 XP series airplanes (including military variants C29A, U125, U125A). This amendment requires a one-time inspection to determine if certain high pressure oxygen hose assemblies are installed, and, if installed, replacement of those hose assemblies with new, improved hose assemblies. This amendment is prompted by a report that certain high pressure oxygen hose assemblies are susceptible to leakage due to those hose assemblies not meeting design specifications during manufacturing. The actions specified by this AD are intended to prevent leaks in high pressure oxygen hose assemblies, which, if not detected and corrected, could result in insufficient oxygen available to the passengers or crew if the cabin pressure altitude should rise to a level requiring emergency oxygen.

Filed under

The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.

Official sources

• The Federal Register document · document 97-27223, the legal text
• FAA Dynamic Regulatory System (DRS) · search 97-21-05 for its current status and any corrections