GE Aerospace CF34
2,293 US-registered aircraft fly this program — 4,586 installed engines across 16 registry codes
Program snapshot(US registry)
16 registry engine codes aggregated
131 aircraft flying the CF34 left the US registry and stayed domestic since 2023 — a teardown proxy, not confirmed part-outs — at an average age of 22 years. 139 more were exported and left the US fleet intact.
FAA registry data, US-registered aircraft only. Deregs = domestic deregistrations — a teardown proxy that also captures re-registrations and some unflagged exports, never a confirmed part-out count. Median build year is a tails-weighted median of per-variant medians (≈). 680 of 2,293 active tails are registered under generic series codes rather than a specific variant, so per-variant splits are partial.
Registry codes under this program
FAA registry — as registered, variants + generic series rows
| Engine model | Active tails | Engine units | Median build yr | Deregs since ’23 | Exported | Avg age at dereg |
|---|---|---|---|---|---|---|
| CF34-8E5 | 693 | 1,386 | 2016 | 0 | 3 | 15 yr |
| CF34 seriesgeneric code | 676 | 1,352 | 2003 | 87 | 38 | 23.4 yr |
| CF34-3B | 329 | 658 | 2010 | 2 | 37 | 14.1 yr |
| CF34-8C5 | 270 | 540 | 2014 | 5 | 0 | 19.2 yr |
| CF34-8C5B1 | 132 | 264 | 2006 | 4 | 0 | 23 yr |
| CF34-3B1 | 96 | 192 | 2003 | 13 | 14 | 20.9 yr |
| CF34-10E6 | 22 | 44 | 2008 | 17 | 26 | 15.8 yr |
| CF34-3A2 | 20 | 40 | 1991 | 1 | 0 | — |
| CF34-3A | 15 | 30 | 1987 | 2 | 0 | 35.5 yr |
| CF34-3A1 | 15 | 30 | 1994 | 0 | 1 | 28 yr |
| CF34-8C5A1 | 10 | 20 | 2006 | 0 | 0 | — |
| CF34-10E5A1 | 8 | 16 | 2007 | 0 | 15 | 12.8 yr |
+ 4 more registry codes covering 7 active tails (each under 8 tails).
Counts reflect the engine model exactly as registered. Registry-wide, roughly 57% of engine records name a specific variant; the rest carry generic series codes, so generic rows coexist with variant rows and per-variant figures are partial. Deregs = domestic deregistrations (a teardown proxy, not confirmed part-outs); exported aircraft left the US fleet intact.
Airframe applications
FAA registry + BTS T-100 family rollups
| Family | Tails on this program | Family US fleet | Avg fleet age | Built 15+ yrs ago | Avg cycles / yr |
|---|---|---|---|---|---|
| CRJ | 947 | 1,002 | 19.9 yr | 769 | 987 |
| E-Jet | 775 | 840 | 11.2 yr | 201 | 1,626 |
“Tails on this program” counts US-registered aircraft the registry rollup maps to both the family and a CF34 engine code — an undercount, since not every tail resolves to a family. Family fleet, age, and cycles columns describe the WHOLE family across every engine option, not just CF34-powered aircraft (cycles from BTS T-100, 2025).
Airworthiness Directive activity
FAA / EASA public regulatory data
- FAA AD 2025-14-03effective Aug 25, 2025Mixed actions
The FAA is adopting a new airworthiness directive (AD) for certain General Electric Company (GE) Model CF34-10E2A1, CF34-10E6, CF34-10E6A1, CF34-10E7, CF34-10E7-B, CF34-10E5, and CF34-10E5A1 engines. This AD was prompted by a report of cracks found in the high- pressure turbine (HPT) front rotating air seal. This AD requires performing repetitive fluorescent penetrant inspections (FPIs) to detect indications or linear indications (any indication which is four times longer than the width of that same indication) in the HPT front rotating air seal and, if necessary, replacing the HPT front rotating air seal or HPT rotor disk with parts eligible for installation as applicable. This AD also includes an optional terminating action to the repetitive FPIs. The FAA is issuing this AD to address the unsafe condition on these products.
- FAA AD 2025-12-08effective Jul 23, 2025Prohibition
The FAA is adopting a new airworthiness directive (AD) for certain General Electric Company (GE) Model CF34-8C1, CF34-8C5, CF34- 8C5A1, CF34-8C5A2, CF34-8C5A3, CF34-8C5B1, CF34-8E2, CF34-8E2A1, CF34- 8E5, CF34-8E5A1, CF34-8E5A2, CF34-8E6, and CF34-8E6A1 engines. This AD was prompted by a predicted reduction in the cyclic life of the combustion chamber assembly (CCA) forward flange. This AD requires fluorescent penetrant inspections (FPIs) of the CCA for any indications and replacement if necessary. The FAA is issuing this AD to address the unsafe condition on these products.
- FAA AD 2025-10-04effective Jun 26, 2025Mixed actions
The FAA is adopting a new airworthiness directive (AD) for all General Electric Company (GE) Model CF34-10E2A1, CF34-10E5, CF34- 10E5A1, CF34-10E6, CF34-10E6A1, CF34-10E7, and CF34-10E7-B engines with certain part-numbered high-pressure turbine (HPT) shroud/low pressure turbine (LPT) nozzle assemblies installed. This AD was prompted by a report of failed retention features of the inner and outer support air ducts (commonly referred to as spoolies) discovered during engine disassembly. This AD requires a visual inspection of the combustion case for wear and gouges, repair if necessary, and rework of the affected HPT shroud/LPT nozzle assemblies to add a positive retention of the support air duct. The FAA is issuing this AD to address the unsafe condition on these products.
- FAA AD 2023-02-05effective Mar 14, 2023Mixed actions
The FAA is adopting a new airworthiness directive (AD) for all General Electric Company (GE) CF34-8C1, CF34-8C5, CF34-8C5A1, CF34- 8C5B1, CF34-8C5A2, CF34-8C5A3, CF34-8E2, CF34-8E2A1, CF34-8E5, CF34- 8E5A1, CF34-8E5A2, CF34-8E6, and CF34-8E6A1 model turbofan engines. This AD was prompted by a predicted reduction in the cyclic life of the combustion chamber assembly aft flange. This AD requires revisions to the airworthiness limitations section (ALS) of the existing engine manual (EM) and the operator's existing approved maintenance or inspection program, as applicable, to incorporate initial and repetitive fluorescent penetrant inspections (FPIs) of the combustion chamber assembly. The FAA is issuing this AD to address the unsafe condition on these products.
- FAA AD 2022-21-06effective Nov 15, 2022Prohibition
The FAA is adopting a new airworthiness directive (AD) for certain General Electric Company (GE) CF34-8C and CF34-8E model turbofan engines. This AD was prompted by a report of a crack found on the low-pressure turbine (LPT) stage 5 disk at the forward arm area. This AD requires the removal of the affected LPT stage 5 disk and replacement with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.
Directives in the FAA / EASA corpus we have processed whose text names CF34 engine models — not a complete historical AD list, and text matching can include airframe directives that reference the engine. An AD is a compliance requirement that drives scheduled work on a regulator's clock — a regulatory compliance signal, not a failure prediction, and no comment on this engine's reliability.