Service difficulty report · O-Ring · Boeing 747422

Difficulty date
June 28, 2007
Submitted
July 24, 2007
Operation
Air carrier
Aircraft
N196UA
Make and model
Boeing 747422
Aircraft serial
28715
Engine
Pwa PW4056
Part
O-Ring
Part number
680146904
Condition
Damaged
Location
Evac Slide
Component
Evac Slide
Component part number
MR25652
Stage of operation
IN
How discovered
O
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

LOW BOTTLE PRESSURE. PIN HOLE LEAK AROUND O-RING ON PRESSURE GAUGE. REPLACED O-RING, RECHECKED, NO LEAKS FOUND, REPLACED WITH STOCK BOTTLE. SLIDE PROBLEM ROOT CAUSE: O-RING HARDENED DUE TO HEAT & OXIDATION & LOST ELASTICITY.