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Interim Recommendation issued to: Federal Aviation Administration (FAA)

Recommendation details
Output No: IR19990089
Date issued: 28 July 1999
Safety action status:
Background: Why this Interim Recommendation was developed

Output text

The Bureau of Air Safety Investigation recommends that the Federal Aviation Administration issue a directive for an immediate check of the fitment of passenger oxygen system mask container doors on all Beech King Air B200 aircraft and, all other aircraft similarly equipped.

As a result of the investigation into this safety deficiency, the Bureau simultaneously issues the following interim recommendations:

IR19990084

The Bureau of Air Safety Investigation recommends that the Civil Aviation Safety Authority issue a directive for an immediate check of the fitment of passenger oxygen system mask container doors on all Australian Beech King Air B200 aircraft and, all other aircraft similarly equipped.

IR19990088

The Bureau of Air Safety Investigation recommends that Raytheon Aircraft issue a directive for an immediate check of the fitment of passenger oxygen system mask container doors on all Beech King Air B200 aircraft and, all other Raytheon aircraft similarly equipped.

IR 19990090

The Bureau of Air Safety Investigation recommends that Raytheon Aircraft examine and implement methods of preventing incorrect passenger oxygen system mask container door fitment as installed in Beech King Air B200 series aircraft, and all other Raytheon aircraft similarly equipped.

Initial response
Date issued: 23 August 1999
Response from: Federal Aviation Administration (FAA)
Action status: Monitor
Response text:

The Office of Accident Investigation is in receipt of your recommendations concerning "B-200 Passenger Oxygen System."

Your recommendations have been forwarded to the appropriate office for response. Your recommendations have been identified as 99.301 through 99.303, and inquiries should reference these numbers.

You will be kept informed as to the progress and final resolution of your submission. If you have any questions, please contact this office.

Further correspondence
Date issued: 11 January 2000
Response from: Federal Aviation Administration (FAA)
Response status: Closed - Accepted
Response text:

Subject: FAA Safety Recommendations 99.301 through 99.303

The Office of Accident Investigation convened a Safety Recommendation Review Board to review the enclosed responses to your safety Recommendations. As a result, the Review Board classified your recommendations as follows:

99.301 - "Closed-Not Adopted"
99.302 - "Open-Awaiting Further Response"
99.303 - "Closed-Not Adopted"

If you have any questions, please contact [name and phone number provided].

ATSB Note: The following extract was part of the enclosure and is published for clarification.

1. Recommendation 99.301 - The Bureau of Air Safety Investigation recommends that the Federal Aviation Administration issue a directive for an immediate check of the fitment of passenger oxygen system mask container doors on all Beech King Air B200 aircraft and, all other aircraft similarly equipped.

The Raytheon Aircraft maintenance manual for the Beech Super King Air 200 Series airplanes requires that an oxygen system functional test be performed at the Phase 1 and Phase 3 inspections. This results in an initial inspection at 200 hours and subsequent inspections every 400 hours. During each oxygen system inspection, the operator is required to ensure that the doors on the mask containers open and the masks drop out. Additionally, the Model 200 Series Maintenance Manual cautions operators that the oxygen "Container door can be positioned 180' off. If this happens, the plunger cannot push the door open when activated." Other similarly equipped aircraft have the same oxygen system maintenance schedule. The Model 300 Series Maintenance Manual does not have the additional cautionary note.

However, Raytheon has committed to revising this manual to add a similar note to that in the Model 200 manual. To provide an added level of awareness to operators, Raytheon Aircraft has published an article regarding this subject in a King Air Model Communique. The Communique will be mailed to all operators of Raytheon aircraft equipped with auto-deploy oxygen masks to ensure that all operators are aware of the importance of properly installing the doors on the oxygen mask boxes. Considering the maintenance instructions already in place, issuance of an Airworthiness Directive for an immediate check of the fitment of passenger oxygen system mask container doors would not significantly add to the safety of the fleet.

In conclusion, this office recommends the Safety Recommendations 99.301, 99.302 and 99.303 be closed. No further ACO action is required or planned.

 
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Last update 01 April 2011