Airworthiness Directive · Amendment 39-14977 · General Electric Aircraft Engines (GE) CF34-3A1/-3B/-3B1 Turbofan Engines
General Electric Aircraft Engines (GE) CF34-3A1/-3B/-3B1 Turbofan Engines
Superseded. A later AD replaced this one: AD 2009-26-09. Comply with the one in force.
This AD applies to General Electric Aircraft Engines (GE) CF34-3A1/-3B/-3B1 turbofan engines that have fan disks with serial numbers (SNs) listed in Table 1 of this AD.
| SN (Fan Disk) | ESN (current) |
|---|---|
| GEE148JH | 872787 |
| GEE01629 | 807168 |
| GEE01888 | 807188 |
| GEE147MF | 807620 |
| GEE147NA | 807622 |
| GEE147V5 | 807624 |
| GEE147VC | 807625 |
| GEE148JG | 807633 |
| GEE145LL | 872526 |
| GEE145NK | 872545 |
| GEE1466F | 872563 |
| GEE1466L | 872568 |
| GEE146H3 | 872599 |
| GEE146KD | 872604 |
| GEE146N7 | 872634 |
| GEE147N7 | 872705 |
| GEE147N8 | 872709 |
| GEE14818 | 872727 |
| GEE14815 | 872730 |
| GEE1480J | 872731 |
| GEE1485J | 872745 |
| GEE1480F | 872750 |
| GEE14885 | 872763 |
| GEE148EJ | 872780 |
| GEE148FT | 872785 |
| GEE148ER | 872790 |
| GEE148PN | 872804 |
| GEE148RN | 872811 |
| GEE148TW | 872817 |
| GEE03675 | SPARE |
| GEE148R0 | SPARE |
| GEE148VT | 872830 |
| GEE148WC | 872837 |
| GEE1F9G6 | 872841 |
| GEE1F9G8 | 872846 |
| GEE1F9GA | 872849 |
| GEE1F9WN | 872857 |
| GEE1FA22 | 872866 |
| GEE1FA6H | 872886 |
(d) For reference, affected regional jet fan disk part numbers (P/Ns) are 5922T01G04, 5922T01G05, 6078T57G01, 6078T57G02, 6078T57G03, 6078T57G04, 6078T57G05, and 6078T57G06.
(e) For reference, affected business jet fan disk P/Ns are 5921T18G01, 5921T18G09, 5921T18G10, 5921T54G01, 5922T01G02, 5922T01G04, 5922T01G05, 6020T62G04, 6020T62G05, 6078T00G01, 6078T57G01, 6078T57G02, 6078T57G03, 6078T57G04, 6078T57G05, and 6078T57G06.
(f) These engines are installed on, but not limited to, Bombardier, Inc. CL-600-2B16 (CL-601-3R Variant), CL-600-2B16 (CL-604 Variant), and CL-600-2B19 (Regional Jet Series 100 and 440) model airplanes.
This action supersedes emergency airworthiness directive (AD) 2007-04-51 that was sent previously to all known U.S. owners and operators of GE CF34-3A1/-3B/-3B1 turbofan engines. That action required a onetime visual and tactile inspection of certain areas of certain serial number (SN) fan disks for an arc-out defect, within 20 engine flight hours after the effective date of that AD. This AD supersedes AD 2007-04-51 and adds eight SNs to the list of suspect fan disks. This AD results from GE discovering eight additional SNs of fan disks suspected of having an arc-out defect, and from the original report that a GE CF34-3B1 turbofan engine experienced an uncontained fan disk failure during flight operation. We are issuing this AD to prevent an uncontained fan disk failure and airplane damage.
You are responsible for having the actions required by this AD performed within 20 engine flight hours after the effective date of this AD, unless the actions have already been done.
(i) Perform a onetime visual and tactile inspection of the bore area on the 39 fan disks listed in Table 1 of this AD, that have not had a shop-level inspection.
(j) For regional jet engine models CF34-3A1/-3B1, use paragraphs 3.A through 3.B.(2)(h) of the Accomplishment Instructions of GE Alert Service Bulletin (ASB) No. CF34-AL S/B 72-A0232, Revision 1, dated February 27, 2007, to do the inspections.
(k) For business jet engine models CF34-3A1/-3B, use paragraphs 3.A through 3.B.(2)(h) of the Accomplishment Instructions of GE ASB No. CF34-BJ S/B 72-A0213, Revision 1, dated February 27, 2007, to do the inspections.
Previous inspection credit is allowed:
(1) For regional jet engine models CF34-3A1/-3B1, inspected using paragraphs 3.A through 3.B.(2)(g) of the Accomplishment Instructions of GE ASB No. CF34-AL S/B 72-A0232, dated February 15, 2007, for the fan disk SNs listed in emergency AD 2007-04-51.
(2) For business jet engine models CF34-3A1/-3B, inspected using paragraphs 3.A through 3.B.(2)(g) of the Accomplishment Instructions of GE ASB No. CF34-BJ S/B 72-A0213, dated February 15, 2007, for the fan disk SNs listed in emergency AD 2007-04-51.
(m) Fan disks listed in Table 1 of this AD that have already had a full visual inspection, eddy current inspection, and fluorescent penetrant inspection using GE CF34-3 (BJ) Heavy Maintenance Manual SEI-782, Section 72-21-00, or using GE CF34-3 (RJ) Engine Manual SEI-756, Section 72-21-00, are considered in compliance with this AD.
