Airworthiness Directive · Amendment 39-19263 · Engine oil system
Rolls-Royce plc Turbojet Engines
This AD applies to all Rolls-Royce plc (RR) Viper Mk. 601-22 engines.
We are adopting a new airworthiness directive (AD) for Rolls- Royce plc (RR) Viper Mk. 601-22 turbojet engines. This AD requires removing the oil pump assembly, part number (P/N) V112027, and oil pressure filter, P/N V21264, from service and replacing them with parts eligible for installation. This AD was prompted by a report of an engine failure caused by installation of an incorrect oil filter. We are issuing this AD to correct the unsafe condition on these products.
(1) For engines with an oil pump assembly, part number (P/N) V112225 or P/N NPN11962, installed:
(i) After the effective date of this AD, within 30 days or 25 flight hours, whichever occurs first, inspect the oil pump assembly to determine the P/N of the oil pressure filter in accordance with the Accomplishment Instructions, Paragraph 2.A.(3), of RR Alert Service Bulletin (ASB) Mk. 601-22 Number 72-A208, dated September 2017.
(ii) If an oil pressure filter, P/N V21264, is installed, replace the oil pressure filter before the next flight with oil filter, P/N 2526, in accordance with the Accomplishment Instructions, Paragraph 2.A.(3)(b), of RR ASB Mk. 601-22 Number 72-A208, dated September 2017.
(2) For engines with an oil pump assembly, P/N V112027, installed:
(i) After the effective date of this AD, within 30 days or 25 flight hours, whichever occurs first, replace the oil pump assembly with oil pump assembly, P/N V112225 or P/N NPN11962, in accordance with the Accomplishment Instructions, Paragraph 2.A.(2), of RR ASB Mk. 601-22 Number 72-A208, dated September 2017.
(ii) Reserved.
After the effective date of this AD, do not install an oil pump assembly, P/N V112027, or an oil pressure filter, P/N V21264, on any engine, nor return any engine to service with an oil pump assembly, P/N V112027, or an oil pressure filter, P/N V21264, installed.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Engines
