Is AD 99-5038 a recurring Airworthiness Directive?

No — AD 99-5038 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-5038 apply to?

AD 99-5038 applies to Mcdonnell Douglas Helicopter Systems — models MD-900. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-5038

one-time

AD 99-5038 · 1999-03-03 · airframe

Airworthiness Directives; McDonnell Douglas Helicopter Systems Model MD-900 Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to McDonnell Douglas Helicopter Systems (MDHS) Model MD- 900 helicopters. This action requires establishing or reducing certain life limits, applying serial numbers (S/N's), determining hours time- in-service (TIS), and creating component history cards or equivalent records for various parts. This amendment is prompted by analysis that indicates a need for establishing or reducing life limits to avoid fatigue failure of certain parts. The actions specified by this AD are intended to apply appropriate life limits to various parts.

Which aircraft AD 99-5038 applies to

MakesMcdonnell Douglas Helicopter Systems

ModelsMD-900

Serial-conditional — narrows to serials 900-00002–900-00057.

Part-conditional — 900D2436528-101, 900D6400004-101, 900DF436026-101, 900DF400100-101, 900R2443000-105, 900C3010042-105, 500N5311-5, 900R3442009-101.

Establishes life limits: main rotor drive shaft retired at 1,450 hrs TIS, NOTAR pitch plate assembly at 3,527 hrs TIS, spherical/slider main rotor bearing at 12,807 hrs TIS. Serial-number marking of the pitch plate assembly required on MD-900 helicopters S/N 900-00002 through 900-00057 per MDHS SB 900-058R1. Revises the Airworthiness Limitations Section of the MD-900 Maintenance Manual.

Whether AD 99-5038 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 99-5038 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.