SDR QXEA2014032400235

Service difficulty report · Seat Track · Bombdr DHC8402

Difficulty date: March 17, 2014
Submitted: March 24, 2014
Operation: Air carrier
Aircraft: N427QX
Make and model: Bombdr DHC8402
Aircraft serial: 4156
Aircraft time: 16,682 hours, 18,073 cycles
System (JASC): 5347 · Fuselage, Seat/Cargo Attach Fittings
Part: Seat Track
Condition: Corroded
Location: Bs 228-570
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

SEAT TRACK NR 7 HAS NUMEROUS AREAS OF PITTING CORROSION FROM FS 228.00-FS 570.00. REMOVED PITTING CORROSION AT NUMEROUS AREAS ON SEAT TRACK 7, REF SRM 53-20-49. EVALUATED SEAT TRACK NR 7 ORIGINAL MATERIAL THICKNESS FROM TOP TO BOTTOM SECTION OF THE SEAT TRACK CLAW IS .460", MATERIAL LOSS AFTER BLENDOUT IS BET .005" TO .025IN. DEPTH THE MAX ALLOWABLE BLENDOUT LIMIT IS ONLY .015" IAW SRM 53-20-49. REWORKED AREAS IS OUT LIMITS EVALUATED AND MEASURED USING TUC6161 DEPTH GAGE. REPLACEMENT COMPLIED WITH ON BTAC NRI JOB 5415611, OP 133.