Is AD 98-19-12 a recurring Airworthiness Directive?

Yes — AD 98-19-12 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 98-19-12 apply to?

AD 98-19-12 applies to Rolls-Royce — models RB211 Trent 700. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-19-12

recurring

Official AD 98-19-12 · FR doc 98-24645 · 1998-09-16 · turbine engine

Airworthiness Directives; Rolls-Royce, plc RB211 Trent 700 Series Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to Rolls-Royce, plc RB211 Trent 700 series turbofan engines. This action requires repositioning of the oil metering jet up into the oil distributor within the bevel gearshaft, followed by repetitive inspections of the Magnetic Chip Detector (MCD). Evidence of driving bevel gearshaft ball bearing failure requires replacement of the Step Aside Gearbox (SAGB). This amendment is prompted by reports of uncommanded engine rundowns caused by failure of the SAGB driving bevel gearshaft ball bearing due to oil starvation. This causes a loss of drive to the external gearbox and accessories, resulting in an inflight engine shutdown. The actions specified in this AD are intended to prevent inflight engine shutdowns caused by SAGB driving bevel gearshaft ball bearing failure.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 98-19-12 applies to

MakesRolls-Royce

ModelsRB211 Trent 700

Installed on but not limited to Airbus A330 series aircraft; applies to each identified engine regardless of modification, alteration, or repair status.

Whether AD 98-19-12 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:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.

Date — When the work was done.

Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.

Signature & certificate — The A&P/IA who returned it to service, with certificate number.

Is AD 98-19-12 complied with on your aircraft?

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.