Airworthiness Directive · Amendment 39-10039 · Puritan Bennett Aero Systems Company Series 174290 Constant Flow Airline Portable Oxygen Masks, Part Numbers 174290-14, 174290-24, 174290-34, 174290-44, and 174290-54
Puritan Bennett Aero Systems Company Series 174290 Constant Flow Airline Portable Oxygen Masks, Part Numbers 174290-14, 174290-24, 174290-34, 174290-44, and 174290-54
Series 174290 Constant Flow Airline Portable Oxygen Masks, Part Numbers 174290-14, 174290-24, 174290-34, 174290- 44, and 174290-54, that have a manufacturing date between September 1992 to August 1996; utilized in aircraft that are certificated in any category. Note 1. The part number and date of manufacture of these masks are located on the oxygen mask gas bag. These oxygen masks are the portable type as opposed to the drop-down design. Note 2. This AD applies to aircraft equipped with an oxygen mask that is identified in the preceding applicability provision, regardless of whether a mask has been modified, altered, or repaired in the area subject to the requirements of this AD. For aircraft utilizing the oxygen masks that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
This amendment adopts a new airworthiness directive (AD) that applies to Puritan Bennett Aero Systems Company (Puritan Bennett) Series 174290 Constant Flow Airline Portable Oxygen Masks, Part Numbers 174290-14, 174290-24, 174290-34, 174290-44, and 174290-54, that are utilized on aircraft. This action requires replacing any Series 174290 Constant Flow Airline Portable Oxygen Masks, Part Numbers 174290-14, 174290-24, 174290-34, 174290-44, and 174290-54, that have a manufacturing date between September 1992 to August 1996 with an FAA- approved mask that incorporates a part number not covered by this AD. These masks have a connector with an orifice that could restrict more than half of the oxygen flow to the passenger. This oxygen mask is mainly used for emergency medical action or emergency decompression procedures during flight. The actions specified by this AD are intended to prevent restricted oxygen flow, which, if not corrected, could cause serious injury to a passenger in need of emergency or first aid oxygen during flight.
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.
Appliances and equipment
