SDR DJFA20120604004

Service difficulty report · Rib · Beech 400A

Difficulty date: June 4, 2012
Submitted: June 27, 2012
Operation: Air carrier
Aircraft: N428LX
Make and model: Beech 400A
Aircraft serial: RK264
Aircraft time: 8,544 hours, 7,162 cycles
System (JASC): 5511 · Horizontal Stabilizer, Spar/Rib
Part: Rib
Part number: 45A21116005
Condition: Cracked
Location: Zone 300
Part time: 8,544 hours, 7,162 cycles
Stage of operation: IN
How discovered: B
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING INSPECTION, FOR CRACKS ON THE RIB FLANGES OF THE HORIZONTAL STABILIZER ASSEMBLY, THE RIB DESCRIBED BELOW WAS FOUND CRACKED. ON THE LOWER FLANGE AT RIGHT HORIZTONAL CANTED STATION 62.20, BETWEEN THE FWD AND AFT SPARS. CRACKS EMANATE FROM THE FASTENER HOLES. THE RIBS WERE REPLACED IAW MFG KIT 128-6200-001.

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