Service difficulty report · Floorboard · Boeing 737990ER

Difficulty date
August 30, 2025
Submitted
September 11, 2025
Operation
Air carrier
Aircraft
N471AS
Make and model
Boeing 737990ER
Aircraft serial
41703
Aircraft time
40,738 hours, 12,607 cycles
Part
Floorboard
Part number
16T015A0477
Condition
Delaminated
Location
Zone 200
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

MULTIPLE CORRODED FASTNERS AND AREAS OF DELAMINATION ON FLOORBOARD 242TF. GROUNDED - YES. REPAIRED DELAMINATION AND REPLACED INSERTS ON FLOORBOARD 242TF IAW B737-900 SRM 53-00-50-2R-1, 53-00-50-2R-0.