Airworthiness Directive 2001-13-28
one-timeAirworthiness Directives; Rolls-Royce Limited, Aero Division-Bristol, S.N.E.C.M.A. Olympus 593 Mk. 610-14-28 Turbofan Engines
What this AD requires
This amendment adopts a new airworthiness directive (AD) that is applicable to Rolls-Royce Limited, Aero Division-Bristol, S.N.E.C.M.A. (RR) Olympus 593 Mk. 610-14-28 turbofan engines. This action requires replacement of the low-oil pressure (LOP) switch. This amendment is prompted by a report of the failure of the low pressure (LP) and high pressure (HP) rotor thrust bearings due to oil starvation that was caused by the loss of the LOP switch function and resulted in a delayed engine shutdown. The actions specified in this AD are intended to prevent the failure of the LOP switch to indicate an LOP event, which could contribute to uncontained engine failure due to oil starvation in the thrust bearings.
Which aircraft AD 2001-13-28 applies to
Requires installing a revised LOP switch (extended support bush, angled backshell, added cable slack) per Rolls-Royce SB OL.593-71-9056-33 Rev 2, dated Dec 7, 2000, to prevent failure to indicate an LOP event contributing to uncontained engine failure from thrust-bearing oil starvation. Specific engine serial applicability list is in the preceding provision, not captured in this excerpt.
Whether AD 2001-13-28 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.