SDR ASAA2016032116325

Service difficulty report · Channel · 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: Channel
Part number: 146A750222
Condition: Corroded
Location: Bs 727j-767
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, RT FLOOR SUPPORT ZEE CHANNEL SECTION IS CORRODED, APPROXIMATELY BS 727J+6 TO BS 767. ACFT GROUNDED. REMOVED CORROSION AND FOUND BEYOND ALLOWABLE LIMITS IAW SRM 53-00-53-1A-2. ORIGINAL MATERIAL THICKNESS IS 0.040 IN, REMAINING THICKNESS IS 0.033", REMOVED 0.007". REPLACED DAMAGED SECTION APPROXIMATELY BS 727J+6, BS 767 RTH IAW SRM 53-00-53-2R-5 AND DWG 146A7500, REV A.