Service difficulty report · Oxygen Mask · Cessna 550

Difficulty date
November 6, 2008
Submitted
November 6, 2008
Operation
General aviation
Aircraft
N43SA
Make and model
Cessna 550
Aircraft serial
5500086
Aircraft time
10,523 hours, 7,697 cycles
Part
Oxygen Mask
Part number
C3512000205
Part serial
NONE
Condition
Torn
Location
Cabin
Part time
2,500 hours
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

THREE OF THE DROP DOWN PASSENGER OXYGEN MASKS P/N C351-2000-205 OR CESSNA P/N 17504-61 WERE FOUND WITH TEARS IN THE FACE CUSHION NEXT TO THE INNER MASK HOUSING IN THE SAME AREA DESCRIBED IN AD 99-08-21. HOWEVER THE ELASTOMERIC CURE DATES ON THESE MASKS ARE THE 3RD QUARTER OF 1999, THE AD ONLY ADDRESSES MASKS WITH A CURE DATE FROM 3RD QUARTER 1993 TO 1ST QUARTER 1997. THESE TEARS COULD LEAD TO LEAKAGE AND POSSIBLE INSUFFICIENT OXYGEN DELIVERY AS DESCRIBED IN THE ORIGINAL A/D.

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