Is AD 98-14-10 a recurring Airworthiness Directive?

Yes — AD 98-14-10 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 98-14-10 apply to?

AD 98-14-10 applies to Alliedsignal — models RIA-35B. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-14-10

recurring

Official AD 98-14-10 · FR doc 98-17914 · 1998-07-07 · appliance

Airworthiness Directives; Boeing Model 747-400, 757, 767, and 777 Series Airplanes Equipped with AlliedSignal RIA-35B Instrument Landing System Receivers

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to certain Boeing Model 747-400, 757, 767, and 777 series airplanes. This action requires a revision to the Airplane Flight Manual (AFM) to prohibit certain types of approaches if only one instrument landing system (ILS) receiver is operational. This action also requires repetitive inspections to detect certain faults of all RIA-35B ILS receivers, and replacement of discrepant ILS receivers with new, serviceable, or modified units; or, alternatively, an additional revision to the AFM and installation of a placard to prohibit certain operations. This AD also provides for optional terminating action for the AFM revisions and repetitive inspections. This amendment is prompted by a report of errors in the glide slope deviation provided by an ILS receiver. The actions specified in this AD are intended to detect and correct faulty ILS receivers, and to ensure that the flightcrew is advised of the potential hazard of performing ILS approaches using a localizer deviation from a faulty ILS receiver and also advised of the procedures necessary to address that hazard. Erroneous localizer deviation could result in a landing outside the lateral boundary of the runway.

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 98-14-10 applies to

MakesAlliedsignal

ModelsRIA-35B

Part-conditional — 066-50006-0101, 066-50006-1101.

Applies to airplanes equipped with AlliedSignal RIA-35B ILS receiver, P/N 066-50006-0101 (single operative receiver prohibited for ILS/LOC approach); fault indicated via EICAS 'SNGL SOURCE ILS' message on Model 747-400/777 series airplanes, or an ILS flag on the EFIS for Model 757/767 series airplanes; requires fault-memory inspection every 64 flight cycles or replacement/modification to P/N 066-50006-1101 per AlliedSignal SB M-4426 (RIA-35B-34-6) Rev 3, dated May 1998.

Whether AD 98-14-10 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 98-14-10 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.