AD 97-24-11
Unsafe Condition
Fatigue cracking of the left-hand and right-hand flanges and finger strips at rib 5.0 of the vertical stabilizer, which could reduce structural integrity.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct repetitive eddy current inspections of the flanges and finger strips at rib 5.0 of the vertical stabilizer to detect fatigue cracking and repair if necessary. Install a steel reinforcement in the torsion box at rib 5.0 and cold-expand certain bolt holes on the torsion box. The modification with steel reinforcement terminates repetitive inspection requirements.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to the accumulation of 13,500 total landings or within 6 months, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Fokker Model F28 Mark 0100 series airplanes with serial numbers 11244 through 11460, inclusive; 11463 through 11469, inclusive; 11471; 11474 through 11483, inclusive; 11489 through 11491, inclusive; 11497 through 11499, inclusive; 11501; 11502; 11504; 11506; 11507; 11512 through 11515, inclusive; 11517; 11520.
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.