SDR ASAA2016041816579

Service difficulty report · Channel · Boeing 737990

Difficulty date: April 18, 2016
Submitted: May 3, 2016
Operation: Air carrier
Aircraft: N309AS
Make and model: Boeing 737990
Aircraft serial: 30857
Aircraft time: 53,241 hours, 20,696 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Channel
Part number: 146A750221
Condition: Corroded
Location: Bs 727k-762
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 APPROXIMATELY BS 727K+10 TO 762 IS CORRODED. 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 0.032", REMOVED 0.008 IN ZEE CHANNEL SECTION BS 727K TO 807, REPLACED ON CARD G678335.