AD NUMBER: 2009-07-12
MANUFACTURER: General Electric
SUBJECT: Airworthiness Directive 2009-07-12
SUMMARY: The FAA is adopting a new airworthiness directive
(AD) for General Electric Company (GE) CF34-1A, -3A, -3A1, -3A2,
-3B, and -3B1 turbofan engines with high-pressure (HP) rotor 4-step
air balance piston stationary seals (4-step seals), part numbers
(P/Ns) 4923T54G01,6019T90G03, 6037T99G01, 6037T99G02, and
6037T99G03, installed.