Service difficulty report · Transition Panel · Boeing 737990ER

Difficulty date
February 19, 2026
Submitted
March 10, 2026
Operation
Air carrier
Aircraft
N428AS
Make and model
Boeing 737990ER
Aircraft serial
36353
Aircraft time
36,408 hours, 11,334 cycles
Part
Transition Panel
Part number
146A75023
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 LH TRANSITION PANEL HAS CORROSION BETWEEN STATIONS 727I TO FWD BULKHEAD. GROUNDED - YES. REMOVED CORROSION BETWEEN STA. 737I - FWD BULKHEAD. ORIGINAL THICKNESS .040 MAT LOSS AT GREATEST POINTS .007, AT LOWEST POINT REMAINING THICKNESS AT .033 AREAS OUT OF LIMITS PER B737-900 SRM 53-00-53-1A-2. FABBED AND INSTALLED REPAIRS PER B737-900 SRM 53-00-53-2R-5.