GE CF34 SB #5 Bearing Replacement

August 2012

General Electric Service Bulletin (SB) CF34-72-0252 replaces the #5 bearing that was introduced on newer production engines, starting with engine S/N 950333, or with the incorporation of SB 72-0176. The #5 bearing, P/N 5042T13P04, was redesigned to increase the internal radial clearance. This increased clearance has now shown to be susceptible to higher engine vibrations.

The new bearing, P/N 5042T13P06, reduces the internal radial clearance. GE recommends that this category 6 SB be accomplished at next exposure.

If you are experiencing INTERMITTENT vibration levels that are significantly higher than normal at the higher power settings, please contact Duncan Aviation for further investigation.

For more information about this Service Bulletin, contact me anytime.


William Walker Engine Tech Rep Astra, Challenger, Citation, Embraer, Falcon, Global, Gulfstream, Hawker, King Air, Learjet, Westwind Battle Creek, MI (BTL) +1 269.969.8486

Related Tech Articles

Authorized NDT Services For Honeywell TFE731 Service Bulletins
November 2021

Honeywell Adds New Maintenance Service Plan For HTF Nacelle
June 2021

Honeywell AS907 Inspection Intervals
June 2021

Value Survey: $200 For Five Minutes Of Your Time
June 2021

Talking To The Principal About Comparing Quotes
February 2021

View All Engine & APU Tech Articles