SDR HYIA20110910001

Service difficulty report · Spar Cap · Aerosp ATR42320

Difficulty date: September 10, 2011
Submitted: November 11, 2011
Operation: Air carrier
Aircraft: N42836
Make and model: Aerosp ATR42320
Aircraft serial: 200
Aircraft time: 36,410 hours, 43,608 cycles
System (JASC): 5711 · Wing Spar
Part: Spar Cap
Condition: Corroded
Location: Zone 600
Part time: 36,410 hours, 43,608 cycles
Stage of operation: IN
How discovered: V
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 HEAVY CHECK INSP ZL-530/533-GVI-10000, 5722220-DVI-10000, CORROSION WAS FOUND ON RT WING AFT SPAR LOWER CAP VERTICAL FLANGE BETWEEN RIBS 24 AND 25. CORROSION WAS REMOVED, BLENDED AND INSPECTED USING UT INSP. REMAINING THICKNESS WAS SUBMITTED FOR EVAULUATION UNDER SRI DO/TS-4349/11-5786 AND FOUND TO BE WITHIN LIMITS. ISSUED STRUCTURAL REPAIR APPROVAL SHEET (SRAS) DO/TS-4349/11...6760. SUPPLEMENTARY INSP TASK: DVI OF BLENDED AREAS FOR NEW CORROSION DETECTION WITH THRESHOLD INTERVAL 2 YEARS.

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