SDR ASAA2025042157669

Service difficulty report · Web · Boeing 737990ER

Difficulty date: April 21, 2025
Submitted: May 2, 2025
Operation: Air carrier
Aircraft: N487AS
Make and model: Boeing 737990ER
Aircraft serial: 44108
Aircraft time: 32,319 hours, 9,921 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Web
Part number: 146A8123
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 PIT ENTRY HAS CORROSION ON SILL THRESHOLD THROUGH OUT. GROUNDED - YES. REMOVED CORROSION ON AFT PIT THRESHOLD WEB, ORIGINAL MATERIAL THICKNESS .050, REMOVED .027, REMAINING .023, FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-60-15-1A-1. REMOVED DAMAGED WEB,LOCATED AND DRILLED NEW WEB; PN: 146A8123-25 PO-11202658 AND INSTALLED WEB IAW B737-900ER SRM 51-40-02, SRM 51-40-05, AND BAC DWG 146A8340 REV: G.