SDR ASAA2024112454467

Service difficulty report · Transition Panel · Boeing 737990ER

Difficulty date: November 24, 2024
Submitted: December 13, 2024
Operation: Air carrier
Aircraft: N433AS
Make and model: Boeing 737990ER
Aircraft serial: 41704
Aircraft time: 41,254 hours, 12,967 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Transition Panel
Part number: 146A7502
Condition: Corroded
Location: Zone 100
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, R/H TRANSITION PANEL HAS CORROSION FROM STA 727C TO 727I. GROUNDED - YES. REMOVED CORROSION FROM AFT PIT R/H TRANSITION PANEL FROM STA 727C TO 727I IAW B737-900ER SRM 53-00-53-1A-2. ORIG THICKNESS IS .040" IAW B737-900ER SRM 53-60-53-01-1. REMOVED .010". REMAINING THICKNESS IS .030" AND IS FOUND TO BE OUT LIMITS IAW B737-900ER SRM 53-00-53-1A-2. REMOVED AND REPLACED AFT CARGO, R/H TRANSITION PANEL USING PN: BAC1496-377 7075-T62 PO:1100059.1 FROM STA 727B+10 TO 727I+8 IAW B737-900ER SRM 53-00-53-2R-5.