Airworthiness Directive · Amendment 39-15914 · Rolls-Royce Corporation AE 2100D2, AE 2100D2A, AE 2100D3, and AE 2100J Turboprop Engines
Rolls-Royce Corporation AE 2100D2, AE 2100D2A, AE 2100D3, and AE 2100J Turboprop Engines
This AD applies to Rolls-Royce Corporation (RRC) AE 2100D2, AE 2100D2A, AE 2100D3, and AE 2100J turboprop engines with certain serial number (SN) propeller gearbox (PGB) shaft-and-carrier assemblies installed. These engines are U.S. type-certificated but as of the effective date of this AD are only installed on military airplanes. For the SNs affected, see the Effectivity section of the applicable service bulletin in Table 1 of this AD.
| For engine model: | Reference service bulletin: |
|---|---|
| AE 2100D2, AE 2100D2A | AE 2100D2-A-72-073, Revision 1, dated February 18, 2008. |
| AE 2100D3 | AE 2100D3-A-72-256, Revision 1, dated February 18, 2008. |
| AE 2100J | AE 2100J-A-72-071, Revision 1, dated February 18, 2008. |
These engines are U.S. type-certificated and are installed on, but not limited to, Lockheed Martin C130-J and Lockheed/Alenia C-27J military airplanes.
The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce Corporation (RRC) AE 2100D2, AE 2100D2A, AE 2100D3, and AE 2100J turboprop engines with certain propeller gearbox (PGB) shaft-and- carrier assemblies installed. These engines are U.S. type-certificated but as of the effective date of this AD are only installed on military airplanes. This AD requires monitoring a certain population of PGB shaft-and-carrier assemblies for vibration during flight, and borescope-inspecting the PGB shaft for cracks if vibration is experienced. This AD would also require removing the affected population of PGB shaft-and-carrier assemblies from service and installing serviceable PGB shaft-and-carrier assemblies. This AD results from a report of a crack found in the forward cone of a PGB shaft in an RRC AE 2100D3 turboprop engine that was removed from service due to high vibration. We are issuing this AD to prevent separation of the propeller from the airplane, which could result in injury, and damage to the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done.
During flight, monitor affected engines for vibration in the PGB shaft and carrier assemblies, using the vibration monitoring system in the cockpit.
(g) Whenever a vibration message is displayed on the airplane's Advisory Caution and Warning System, borescope-inspect the PGB shaft-and-carrier assembly for cracks, before any additional flights.
(h) If any crack is found, remove the engine from service.
(i) Guidance on borescope-inspecting, vibration monitoring, and fault isolation procedures can be found in the applicable service bulletin listed in Table 2 of this AD.
| For engine model: | Reference service bulletin: |
|---|---|
| AE 2100D2, AE 2100D2A | AE 2100D2-A-72-074, dated April 7, 2008. |
| AE 2100D3 | AE 2100D3-A-72-258, dated April 7, 2008. |
| AE 2100J | AE 2100J-A-72-070, dated September 17, 2007. AE 2100J-A-72-073, dated October 11, 2007. |
At the next shop visit for PGB inspection or repair after the effective date of this AD, remove the affected PGB shaft-and-carrier assembly from service and install an eligible PGB shaft-and-carrier assembly.
(k) After the effective date of this AD, do not install any PGB shaft and carrier assembly in any aircraft if it was removed for cracks.
For the purpose of this AD, a PGB shaft-and-carrier assembly is eligible for installation if it was manufactured after June 2005, or if it is P/N 23087076 or P/N 23087077.
