Service difficulty report · Transition Panel · Boeing 737990ER

Difficulty date
April 10, 2024
Submitted
May 2, 2024
Operation
Air carrier
Aircraft
N419AS
Make and model
Boeing 737990ER
Aircraft serial
41734
Aircraft time
41,192 hours, 12,959 cycles
Part
Transition Panel
Part number
143A7501
Condition
Corroded
Location
Bs 500d
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

FWD PIT: RH TRANSITION PANEL HAS MULTIPLE SPOTS OF CORROSION FROM STATION 500D TO AFT BULKHEAD. CIRCLED IN RED GREASE PEN. GROUNDED - YES. REMOVED CORROSION. ORIGINAL THICKNESS .040, REMOVED .017, REMAINING .023. FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-00-53-1A-2. FABRICATED NEW FWD R/H TRANSITION PANEL STA 500C 500L AND INSTALLED IAW B737-900 SRM 53-00-53-2R-5TOOLING- T8224KCAL DUE- 25/OCT/24.