Is AD 98-24-34 a recurring Airworthiness Directive?

No — AD 98-24-34 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 98-24-34 apply to?

AD 98-24-34 applies to Hamilton Standard — models 54H60-77, 54H60-91, 54H60-117, 54H60-123, 54H60-125, 54H60. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-24-34

one-time

Official AD 98-24-34 · FR doc 98-31701 · 1998-12-03 · propeller

Airworthiness Directives; Hamilton Standard 54H60 Series Propellers

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to Hamilton Standard 54H60 series propellers. This action requires affected propeller blades to be removed from service and shipped to designated repair facilities for inspection for insufficient cold rolling of the beveled radius of the blade flange. Affected blades are identified by serial number. This amendment is prompted by reports of propeller blades that cracked due to incomplete cold rolling in the beveled radius area of the blade flange. The actions specified in this AD are intended to prevent propeller blade cracks due to incomplete cold rolling during manufacture, which can result in propeller blade separation and damage to the aircraft.

Which aircraft AD 98-24-34 applies to

MakesHamilton Standard

Models54H60-77, 54H60-91, 54H60-117, 54H60-123, 54H60-125, 54H60

Applies to propeller blades identified by serial number in Hamilton Standard Alert Service Bulletin (ASB) No. 54H60-61-A134, Revision 1, dated June 24, 1998, and ASB No. 54H60-61-A135, dated June 24, 1998.

Whether AD 98-24-34 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 98-24-34 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.