Service difficulty report · Transition Panel · Boeing 737990ER

Difficulty date
October 16, 2018
Submitted
October 22, 2018
Operation
Air carrier
Aircraft
N423AS
Make and model
Boeing 737990ER
Aircraft serial
35206
Aircraft time
21,888 hours, 7,230 cycles
Part
Transition Panel
Part number
143A7501192
Condition
Corroded
Location
Fuselage
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, RT TRANSITION PANEL FROM BS 500A TO BS 500L HAS MULTIPLE SPOTS/AREAS OF CORR. GROUNDED - YES. REMOVED CORROSION ON TRANSITION PANEL IAW SRM 51-10-02. ORIGINAL THICKNESS IS .040 , AT MULTIPLE LOCATIONS REMAINING THICKNESS IS .030, LOSS OF .010 OF MATERIAL. OUT OF LIMITS IAW SRM 53-00-53-1A-2. REMOVED TRANSITION PANEL FROM STA 500A TO STA 500L AND REPLACED WITH REPAIRED/FABRICATED TRANSITION PANEL IAW SRM 53-00-53-2R-5 & BAC DWG 143A7500 REV A.