ATA 35

Passenger Oxygen Masks
On February 19 our Service Center, Trimec, reported that during an operational inspection of the passenger oxygen drop down masks, there was one that would not let oxygen flow thru the connection between the larger line attached to the barbed fitting on the oxygen drop down box and the smaller line that goes to the mask. In this case the smaller line was squeezed shut and would not allow oxygen to flow to the mask. The part number in question is a 174080-31 Rev “K”. The, Batch was LC0526K. This lot had been shipped around July of 2005.
A thorough inspection of the masks that are installed in your aircraft is recommended. This inspection should include a functional test of the mask as well as the aircraft system.

Please refer to the IAI AMM 35-00-00 Oxygen system adjustment and test paragraph 1, Steps (1) thru (36).

This may be the time for you to accomplish your chapter 5 requirements: 6- 8 year factory overhaul or 20 life limit.

A follow up investigation of the event is underway and if any fleet action is required it will be communicated accordingly.

ATA 27

Aileron Push Pull Tubes
It was brought to our attention that FAA AD92-12-02 and IAI SB 1124-27-144 are not in agreement. An Alternate Method of Compliance (AMOC) has been completed by the FAA to correct the disparity. The AD states to replace the existing control rods P/N 513506-503 with a P/N 513506-503RE or -503RD. The issue is when you comply with the SB 1124-27-144 by replacing the offending push pull tubes with the stainless 513506-505, you are no longer in compliance with the AD

Please refer to the IAI AMM 27-00-00 Flight Controls
Contact Worthington for a copy of the AMOC for your records (ANM-116-08-182R1)