AD 99-04-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | MD-90-30 | Airworthiness Directives; McDonnell Douglas Model MD-90-30 Series Airplanes |
Unsafe Condition
Failure of the hydraulic damper assemblies of the main landing gear (MLG) due to insufficient material thickness of the spring retainers, which could result in vibration damage and collapse of the MLG.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the right and left MLG hydraulic damper assemblies in accordance with Service Bulletin MD90-32-032, or replace them with modified and re-identified assemblies having specified part numbers. Ensure no unmodified dampers with listed part numbers are installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 2 years after the effective date of this AD (March 17, 1999).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
McDonnell Douglas Model MD-90-30 series airplanes listed in Service Bulletin MD90-32-032, dated July 8, 1998.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.