SDR ASAA2017102122490

Service difficulty report · Floorbeam · Boeing 737990

Difficulty date: October 21, 2017
Submitted: November 13, 2017
Operation: Air carrier
Aircraft: N307AS
Make and model: Boeing 737990
Aircraft serial: 30015
Aircraft time: 58,702 hours, 23,109 cycles
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
Part number: 147A550414
Condition: Corroded
Location: Fuselage
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

PASSENGER COMPARTMENT FLOORBEAM CORRODED STA 947.5 RBL 50. GROUNDED - YES. REMOVED CORROSION, ORIGINAL MATL. THICKNESS .180", REMOVED .120", .060" REMAINING, FOUND TO BE OUT OF LIMITS. REMOVED UPPER T-CHORD FROM FLOORBEAM AND INSTALLED 2 EA. REPAIR SECTION T-CHORDS AND SPLICE ANGLES REF SRM 57-70-51-1A-1, 53-70-51-2R-5, AND DWG 147A5650.