Airworthiness Directive · Amendment 39-16381 · Oxygen
The Boeing Company Model 767-200, -300, and -300F Series Airplanes
This AD applies to The Boeing Company Model 767-200, -300, and -300F series airplanes, certificated in any category; line numbers 1 through 763 inclusive, except line number 758, which was accomplished in production.
We are adopting a new airworthiness directive (AD) for certain Model 767-200, -300, and -300F series airplanes. This AD requires inspecting to verify the part number of the low-pressure flex-hoses of the flightcrew and supernumerary oxygen system installed under the oxygen mask stowage box at flightcrew and supernumerary oxygen mask locations, and replacing the flex-hose with a new non-conductive low- pressure flex-hose if necessary. This AD results from reports of low- pressure flex-hoses of the flightcrew oxygen system that burned through due to inadvertent electrical current from a short circuit in an adjacent audio select panel. We are issuing this AD to prevent inadvertent electrical current, which can cause the low-pressure flex- hoses used in the flightcrew and supernumerary oxygen systems to melt or burn, resulting in oxygen system leakage and smoke or fire.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 36 months after the effective date of this AD, do an inspection to determine whether any low-pressure flex-hose of the flightcrew and supernumerary oxygen systems installed under the oxygen mask stowage location has a part number identified in Table 1 of this AD. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number of the low-pressure flex-hoses of the flightcrew and supernumerary oxygen systems can be conclusively determined from that review.
(1) For any hose having a part number identified in Table 1 of this AD, before further flight, replace the hose with a new or serviceable part, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 767-35A0034, Revision 1, dated June 22, 2000.
(2) For any hose not having a part number identified in Table 1 of this AD, no further action is required by this paragraph.
| Equivalent Boeing supplier part Nos. | Sierra Engineering | Spencer Fluid | Puritan Bennett | Hydraflow |
|---|---|---|---|---|
| 60B50059-70 | 835-01-70 | 9513-20S5-18.0 | ZH784-20 | 38001-70 |
| 60B50059-81 | Not applicable | Not applicable | Not applicable | 38001-81 |
| 60B50059-94 | Not applicable | Not applicable | Not applicable | 38001-94 |
| 60B50059-101 | Not applicable | Not applicable | Not applicable | 38001-101 |
| 60B50059-130 | Not applicable | Not applicable | Not applicable | 38001-130 |
As of the effective date of this AD, no person may install a flightcrew or supernumerary oxygen hose with a part number identified in Table 1 of this AD on any airplane.
(i) Actions accomplished before the effective date of this AD in accordance with Boeing Alert Service Bulletin 767-35A0034, dated September 2, 1999, are considered acceptable for compliance with the corresponding actions specified in this AD.
