SDR 7AHR20121119004

Service difficulty report · Floorbeam · Doug DC983

Difficulty date: November 19, 2012
Submitted: November 19, 2012
Operation: Air carrier
Aircraft: N120MN
Make and model: Doug DC983
Aircraft serial: 53120
Aircraft time: 40,084 hours, 41,076 cycles
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
Condition: Corroded
Location: Zone 200
Part time: 40,084 hours, 51,076 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

AFT FUSELAGE FLOOR STUCTURE AT BS 1322 FLOORBEAM HAS LIGHT CORROSION ON UPPER SURFACE AND AROUND FASTENER HOLERS AT RBL 24 - LBL 60 AND EXFOLIATION CORROSION AT LBL 60. BLENDED CORROSION, FOUND TO BE OUT OF LIMITS IAW SRM 53-01, FIG 1. REMOVED DAMAGE AREAS OF FLOORBEAM IAW 53-05. FABRICATED REPAIR PARTS IAW SRM 53-05, PAGE 474. INSTALLED REPAIR PARTS IAW SRM 53-05, PAGE 474.

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