MANUFACTURER: General Electric Company CF6-45
and CF6-50 Series Turbofan Engines
SUBJECT: Airworthiness Directive 2011-02-07
SUMMARY: This AD supersedes an existing
airworthiness directive (AD) for General Electric Company (GE)
CF6-45 and CF6-50 series turbofan engines with certain low-pressure
turbine (LPT) rotor stage 3 disks installed. That AD currently
requires initial and repetitive borescope inspections of the
high-pressure turbine (HPT) rotor stage 1 and stage 2 blades for
wear and damage, including excessive airfoil material loss. That AD
also requires fluorescent-penetrant inspection (FPI) of the LPT
rotor stage 3 disk under certain conditions and removal of the disk
from service before further flight if found cracked. That AD also
requires repetitive exhaust gas temperature (EGT) system checks
(inspections). This AD requires HPT rotor stage 1 and stage 2 blade
inspections and EGT system inspections. This AD also requires FPI
of the LPT rotor stage 3 disk under certain conditions, removal of
the disk from service before further flight if found cracked, and
an ultrasonic inspection (UI) of the LPT rotor stage 3 disk forward
spacer arm. This AD also requires initial and repetitive engine
core vibration surveys and reporting to the FAA any crack findings,
disks that fail the UI, and engines that fail the engine core
vibration survey.
This AD was prompted by reports received of additional causes of
HPT rotor imbalance not addressed in AD 2010-12-10, and two
additional LPT rotor stage 3 disk events. The FAA is issuing this
AD to prevent critical life-limited rotating engine part failure,
which could result in an uncontained engine failure and damage to
the airplane.
Aero Linx: International Flying Farmers IFF is a not-for-profit organization started in 1944 by farmers who were also private pilots. We have members all across the United States a>[...]
From 2017 (YouTube Version): Remembrances Of An Israeli Air Force Test Pilot Early in 2016, ANN contributor Maxine Scheer traveled to Israel, where she had the opportunity to sit d>[...]
"We renegotiated what our debt restructuring is on a lot of our debts, mostly with the family. Those debts are going to be converted into equity..." Source: Excerpts from a short v>[...]
Also: B-29 Superfortress Reunion, FAA Wants Controllers, Spirit Airlines Pulls Back, Gogo Galileo Van's Aircraft posted a short video recapping the goings-on around their reorganiz>[...]
Chart Supplement US A flight information publication designed for use with appropriate IFR or VFR charts which contains data on all airports, seaplane bases, and heliports open to >[...]