Service difficulty report · Web · Boeing 737990ER

Difficulty date
March 13, 2025
Submitted
April 23, 2025
Operation
Air carrier
Aircraft
N457AS
Make and model
Boeing 737990ER
Aircraft serial
36355
Aircraft time
37,855 hours, 11,929 cycles
Part
Web
Part number
146A8123U25
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

AFT CARGO DOOR SILL AREA FASTENER HOLES CORRODED. GROUNDED - YES. REMOVED CORROSION ON AFT CARGO DOOR THRESHOLD WEB. ORIGINAL MATERIAL = .045 MAT REMOVED =.014 MAT REMAINING = .031 FOUND TO BE OUT OF LIMIT IAW B737-900ER SRM 53-60-15-1A-1. REMOVED DAMAGE WEB LOCATED AND DRILLED NEW WEB P/N 146A8123U25 P.O.# 1117566.2 AND INSTALLED WEB IAW B737-900ER SRM 51-21-05, 51-40-02 AND BAC DWG 146A8340 REV-.