AD 91-23-06
Unsafe Condition
Cracks in the horizontal stabilizer attach fittings could cause uncommanded movement of the horizontal stabilizer and subsequent reduced controllability of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a high-frequency eddy current inspection of the horizontal stabilizer attach fittings within 90 days after the effective date of this AD, following Fokker Service Bulletin F28/55-28. If cracks are found, repair or replace the affected fittings with a serviceable part before further flight. Compliance may be adjusted with FAA approval.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 90 days after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Fokker Model F-28 series airplanes listed in Fokker Service Bulletin F28/55-28, dated December 21, 1990
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.