SDR ASAA2016032116326

Service difficulty report · Floor Support · Boeing 737990

Difficulty date: March 21, 2016
Submitted: April 11, 2016
Operation: Air carrier
Aircraft: N320AS
Make and model: Boeing 737990
Aircraft serial: 33680
Aircraft time: 45,793 hours, 17,529 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Floor Support
Part number: 146A750221
Condition: Corroded
Location: Bs 727f-727i
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 CARGO COMPARTMENT, LT FLOOR SUPPORT ZEE CHANNEL SECTION IS CORRODED, APPROXIMATELY BS 727F+10 TO BS 727I+8. ACFT GROUNDED. REMOVED CORROSION AND FOUND BEYOND ALLOWABLE LIMITS IAW SRM 53-00-53-1A-2. ORIGINAL MATERIAL THICKNESS IS 0.040, REMAINING THICKNESS IS 0.034", REMOVED 0.006". REPLACED LT ZEE CHANNEL SECTION APPROXIMATELY BS 727F+10 TO 727I+8 IAW SRM 53-00-53-2R-5 AND BAC DWG 146A7500, REV A.