Service difficulty report · Beam · Boeing 737990ER

Difficulty date
November 15, 2021
Submitted
November 22, 2021
Operation
Air carrier
Aircraft
N493AS
Make and model
Boeing 737990ER
Aircraft serial
41727
Aircraft time
20,471 hours, 6,498 cycles
Part
Beam
Part number
147A550616
Part serial
NSN
Condition
Corroded
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

STA 986 FLOOR BEAM HAS CORROSION AT LBL 54. GROUNDED - YES. REMOVED CORROSION AT STA 986 FLOOR BEAM AT LBL 54 AND FOUND TO BE OUT OF LIMITS IAW 737-900ER SRM 53-70-51-1A-1 4F REPAIRED BEAM IAW 737-900ER SRM 53-70-51-2R-6 FIG 205W=1.0 O=.150 R=.121 L=1.0 D=.029.