SDR ASAA2025032957290

Service difficulty report · Web · Boeing 737990ER

Difficulty date: March 29, 2025
Submitted: April 15, 2025
Operation: Air carrier
Aircraft: N251AK
Make and model: Boeing 737990ER
Aircraft serial: 62470
Aircraft time: 28,926 hours, 9,363 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Web
Part number: 143A812210
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

FORWARD CARGO DOOR SILL HAS CORROSION IN MULTIPLE AREAS. GROUNDED - YES. REMOVED CORROSION ON FWD CARGO DOOR THRESHOLD WEB ORIGINAL MAT=.045 MAT REMOVED .007 REMAINING=.038 FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-30-15. REMOVED DAMAGE WEB LOCATED AND DRILLED NEW WEB P/N:143A8122-10 P.O.=1118555.1 AND INSTALLED WEB IAW B737-900ER SRM 51-40-02 B737-900ER SRM 51-40-05 AND BOEING DWG=1438330, REV:G.