SDR ASAA2019112573418

Service difficulty report · Channel · Boeing 737990ER

Difficulty date: November 17, 2019
Submitted: November 26, 2019
Operation: Air carrier
Aircraft: N464AS
Make and model: Boeing 737990ER
Aircraft serial: 40714
Aircraft time: 22,330 hours, 7,108 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Channel
Part number: 146A7500
Condition: Corroded
Location: Bs 727c-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 FLOOR SUPPORT RAIL HAS MULTIPLE AREAS OF CORROSION STA. 727.4 TO 727I+8 LBL 22. GROUNDED - YES. CORROSION REMOVED ON AFT CARGO COMP. FLOOR SUPPORT RAIL IAW B737-900 SRM 51-10-02. ORIGINAL THICKNESS IS .040, MULTIPLE READINGS OF REMAINING THICKNESS OF .031. OUT OF LIMITS IAW B737-900 SRM 53-60-53-01-2 & 53-00-53-1A-2. REPAIRED DAMAGED SECTION IAW B737-900ER SRM 53-00-53-22-5 & BAC DWG 1467500 REV C FROM STA 727C+10-STA 727I+8 LBL22.