What was found
PDX - VERTICAL STAB RIB 3.2 HAS A CRACKED LEFT LOWER FLANGE AT AFT END, SEVERAL CRACKS EXTEND THROUGH AND CONNECT APPROXIMATELY FOUR RIVET HOLES. REPAIRED IAW HORIZON AIR EA 4-55-194.
- Difficulty date
- March 2, 2000
- Submitted
- April 13, 2000
- Operation
- Air carrier
- Aircraft
- N478US
- Make and model
- Fokker F28MK4000
- Aircraft serial
- 11227
- Aircraft time
- 30,576 hours, 37,630 cycles
- System (JASC)
- 5531 · Vertical Stabilizer, Spar/Rib
- Part
- Rib
- Condition
- Cracked
- Location
- Vertical Stab
- Stage of operation
- IN
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.