Revised SAIB Covers Certain CFM Engines | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Most Recent Daily Episodes

Episode Date

Airborne-Monday

Airborne-Tuesday

Airborne-Wednesday Airborne-Thursday

Airborne-Friday

Airborne On YouTube

Airborne-Unlimited-04.14.25

Airborne-NextGen-04.15.25

AirborneUnlimited-04.16.25

Airborne-AffordableFliers-04.17.25

SunnFun-DayFour-04.03.25

Fri, Jan 31, 2014

Revised SAIB Covers Certain CFM Engines

Dimension Anomalies Found That Could Affect Cooling Airflow

The FAA has issued a revised Special Airworthiness Information Bulletin (SAIB) to inform owners, operators, and certificated repair facilities of all CFM International CFM56-5, -5A1, -5A1/F, -5A3, -5A4, -5A4/F, -5A5, -5A5/F turbofan engines that non-type certificate holder-repaired low pressure turbine (LPT), stage 1 nozzle guide vanes (NGV), supplied by Chromalloy Gas Turbine, LLC (Chromalloy), are being removed from service due to dimensional anomalies that can affect the cooling airflow to the turbine.

These engines are installed on, but not limited to, Airbus Industries A319 and A320 airplanes. The airworthiness concern is not an unsafe condition that would warrant airworthiness directive action under Title 14 of the Code of Federal Regulations (14 CFR) part 39.We have revised this SAIB to reference updated Chromalloy Service Bulletin (SB) CGT SB 72-047, Revision 1, dated November 26, 2013. The SB was updated to remove a Chromalloy repair part number from service.

The Chromalloy LPT NGV repair increases the dimensional variation in the features that provide the primary cooling air to the turbine. The potential effects of reduced cooling on the turbine include shortfalls in the service life of turbine engine parts. Chromalloy has issued SB CGT SB 72-047, Revision 1, dated November 26, 2013, to replace the Chromalloy-repaired CFM56-5A stage 1 LPT NGV segments. The Chromalloy-repaired LPT NGV removal program is based on the likelihood of an unsafe condition developing in affected CFM56-5A engines.

The FAA recommends that all owners, operators, and certificated repair facilities of affected engines follow the instructions in SB CGT SB 72-047 Revision 1, dated November 26, 2013, to remove the affected parts. Incorporating the SB into your shop procedures soon will decrease the likelihood of shortfalls in the service life of turbine parts.

FMI: SAIB

Advertisement

More News

ANN's Daily Aero-Term (04.15.25): On-Course Indication

On-Course Indication An indication on an instrument, which provides the pilot a visual means of determining that the aircraft is located on the centerline of a given navigational t>[...]

Aero-News: Quote of the Day (04.15.25)

“The remaining infrastructure and staffing for this outdated method costs taxpayers millions of dollars annually to support the small number of pilots that have not converted>[...]

NTSB Prelim: Wild Sky LLC Goat

Weather Conditions Were “Very Gusty” At The Time Of The Accident On March 14, 2025, about 1515 eastern daylight time, an experimental amateur-built Wild Sky Goat light->[...]

Airborne 04.16.25: NYC Heli-Tour Shutdown, FAA Closing RCOs, A-26 Restoration

Also: Penguins Are Bad Pilots, DA42 Fleet Delivery, Coulson Expands, CAF SoCal Celebrates Spitfire 80th The FAA issued an emergency order shutting down New York Helicopter Charter,>[...]

Aero-News: Quote of the Day (04.16.25)

"The FAA is taking this action in part because after the company’s director of operations voluntarily shut down flights, he was fired.... The review, known as a Certificate H>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2025 Web Development & Design by Pauli Systems, LC