Service difficulty report · Transition Panel · Boeing 737990ER

Difficulty date
June 11, 2025
Submitted
July 9, 2025
Operation
Air carrier
Aircraft
N461AS
Make and model
Boeing 737990ER
Aircraft serial
36363
Aircraft time
42,008 hours, 13,036 cycles
Part
Transition Panel
Part number
143A7501204
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

FWD CARGO FLOOR BETWEEN STA 500H+12 TO 500L. RIGHT TRANSITION PANEL HAS OUT OF LIMITS CORROSION. GROUNDED - YES. REMOVED CORR. FROM FWD CARGO FLOOR TRANS PNL AT STA.500H+12 TO 500L ORIG THICKNESS .040 I.A.W. B737-900 SRM 53-30-53, MAT LOSSED .010. REMAINING THICKNESS .030 FOUND TO BE OUT OF LIMITS I.A.W B737-900 SRM 53-00-53 TOOL #T8224U DUE DATE 28/MAR/26. REMOVED AND REPLACED WITH NEW TRANS PNL AND SPLICE I.A.W. B737-900 SRM 53-00-53. LOCATED, DRILLED, COUNTERSINKED AND DEBURRED NEW TRANS PNL AND SPLICE I.A.W B737-900 SRM 51-40-05 ALODINED I.A.W B737-900 SRM 51-21-41. PRIMED I.A.W B737-900 SRM 51-21-72.